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sgls012b ? march 2003 ? revised april 2008 1 post office box 655303 ? dallas, texas 75265 qualified for automotive applications esd protection exceeds 2000 v per mil-std-883, method 3015; exceeds 200 v using machine model (c = 200 pf, r = 0) open drain power-on reset with 200-ms delay (tps775xx) open drain power good (tps776xx) 500-ma low-dropout voltage regulator available in 1.5-v, 1.6-v (tps77516 only), 1.8-v, 2.5-v, 2.8-v (tps77628 only), 3.3-v fixed output and adjustable versions dropout voltage to 169 mv (typ) at 500 ma (tps77x33) ultralow 85 a typical quiescent current fast transient response 2% tolerance over specified conditions for fixed-output versions 20-pin tssop powerpad ? (pwp) package thermal shutdown protection description the tps775xx and tps776xx devices are designed to have a fast transient response and be stable with a 10- f low esr capacitors. this combination provides high performance at a reasonable cost. because the pmos device behaves as a low-value resistor, the dropout voltage is very low (typically 169 mv at an output current of 500 ma for the tps77x33) and is directly proportional to the output current. additionally, since the pmos pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 85 a over the full range of output current, 0 ma to 500 ma). these two key specifications yield a significant improvement in operating life for battery-powered systems. this ldo family also features a sleep mode; applying a ttl high signal to en (enable) shuts down the regulator, reducing the quiescent current to 1 a at t j = 25 c. the reset output of the tps775xx initiates a reset in microcomputer and microprocessor systems in the event of an undervoltage condition. an internal comparator in the tps775xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. power good (pg) of the tps776xx is an active high output, which can be used to implement a power-on reset or a low-battery indicator. the tps775xx and tps776xx are offered in 1.5-v, 1.6-v (tps77516 only), 1.8-v , 2.5-v, 2.8 v (tps77628 only), and 3.3-v fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 v to 5.5 v for tps77501 option and 1.2 v to 5.5 v for TPS77601 option). output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. the tps775xx and tps776xx families are available in 20 pin tssop package. copyright ? 2008, texas instruments incorporated please be aware that an important notice concerning avail ability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. nc ? no internal connection 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 gnd/hsink gnd/hsink gnd nc en in in nc gnd/hsink gnd/hsink gnd/hsink gnd/hsink nc nc reset /pg fb/nc out out gnd/hsink gnd/hsink pwp package (top view) powerpad is a trademark of texas instruments.
sgls012b ? march 2003 ? revised april 2008 2 post office box 655303 ? dallas, texas 75265 t ? time ? s tps77x33 load transient response i ? output current ? ma o v o ? change in ? output voltage ? mv 500 0 0 50 ?50 c o = 2x47 f esr = 1/2x100 m ? v o = 3.3 v v i = 4.3 v 060 40 20 80 100 140 120 160 180 200 t a ? free-air temperature ? c ?40 0 20 120 10 3 ?60 40 60 80 100 ? dropout voltage ? mv v do tps77x33 dropout voltage vs free-air temperature 10 2 10 1 10 0 10 ?1 10 ?2 ?20 140 i o = 10 ma i o = 0 ma c o = 10 f i o = 500 ma available options ? t j output voltage (v) packaged devices t j typ tssop (pwp) 3.3 tps77533pwpq1 tps77633pwpq1 2.5 tps77525pwpq1 tps77625pwpq1 2.8 ? tps77628pwpq1 1.8 tps77518pwpq1 tps77618pwpq1 ?40 c to 125 c 1.6 tps77516pwpq1 ? ?40 c to 125 c 1.5 tps77515pwpq1 tps77615pwpq1 adjustable ? 1.2 v to 5.5 v ? TPS77601pwpq1 adjustable ? 1.5 v to 5.5 v tps77501pwpq1 ? ? the tps775xx has an open-drain power-on reset with a 200-ms delay function. the tps776xx has an open-drain power good function. ? the tps77x01 is programmable using an external resistor divider (see application information). the pwp package is available taped and reeled. add an r suffix to the device type (e.g., tps77501qpwprq1). tps77516 is product preview.
sgls012b ? march 2003 ? revised april 2008 3 post office box 655303 ? dallas, texas 75265 ? see application information section for capacitor selection details. reset / pg out out 7 6 5 in in en gnd 3 16 14 13 v i 0.1 f reset /pg v o 10 f + c o ? figure 1. typical application configuration for fixed output options functional block diagram?adjustable version 200 ms delay (for reset option) _ + v ref = 1.183 v out fb/nc en gnd pg or reset _ + in external to the device r1 r2
sgls012b ? march 2003 ? revised april 2008 4 post office box 655303 ? dallas, texas 75265 functional block diagram?fixed-voltage version _ + v ref = 1.183 v out en gnd r1 r2 pg or reset _ + in 200 ms delay (for reset option) terminal functions tssop package (tps775xx) terminal i/o description name no. i/o description en 5 i enable input fb/nc 15 i feedback input voltage for adjustable device (no connect for fixed options) gnd 3 regulator ground gnd/hsink 1, 2, 9, 10, 11, 12, 19, 20 ground/heatsink in 6, 7 i input voltage nc 4, 8, 17, 18 no connect out 13, 14 o regulated output voltage reset 16 o reset output tssop package (tps776xx) terminal i/o description name no. i/o description en 5 i enable input fb/nc 15 i feedback input voltage for adjustable device (no connect for fixed options) gnd 3 regulator ground gnd/hsink 1, 2, 9, 10, 11, 12, 19, 20 ground/heatsink in 6, 7 i input voltage nc 4, 8, 17, 18 no connect out 13, 14 o regulated output voltage pg 16 o pg output
sgls012b ? march 2003 ? revised april 2008 5 post office box 655303 ? dallas, texas 75265 tps775xx reset timing diagram ? v res is the minimum input voltage for a valid reset . the symbol v res is not currently listed within eia or jedec standards for semiconductor symbology. ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? v i v res ? t t t v o threshold voltage reset output 200 ms delay 200 ms delay output undefined output undefined v it + ? v it ? ? v it ? ? v it + ? less than 5% of the output voltage ? v it ?trip voltage is typically 5% lower than the output voltage (95%v o ) v it? to v it+ is the hysteresis voltage. v res ?
sgls012b ? march 2003 ? revised april 2008 6 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) input voltage range ? , v i ?0.3 v to 13.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . voltage range at en ?0.3 v to 16.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . maximum reset voltage (tps775xx) 16.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . maximum pg voltage (tps776xx) 16.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . peak output current internally limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output voltage, v o (out, fb) 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous total power dissipation see dissipation rating tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating virtual junction temperature range, t j ?40 c to 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ?65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . esd rating, hbm 2 kv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, a nd functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating conditi ons? is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. ? all voltage values are with respect to network terminal ground. dissipation rating table ? free-air temperatures package air flow (cfm) t a < 25 c power rating derating factor above t a = 25 c t a = 70 c power rating t a = 85 c power rating pwp 0 2.9 w 23.5 mw/ c 1.9 w 1.5 w pwp 300 4.3 w 34.6 mw/ c 2.8 w 2.2 w pwp ? 0 3 w 23.8 mw/ c 1.9 w 1.5 w pwp ? 300 7.2 w 57.9 mw/ c 4.6 w 3.8 w this parameter is measured with the recommended copper heat sink pattern on a 1-layer pcb, 5-in 5-in pcb, 1 oz. copper, 2-in 2-in coverage (4 in 2 ). ? this parameter is measured with the recommended copper heat sink pattern on a 8-layer pcb, 1.5-in 2-in pcb, 1 oz. copper with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in 2 ) and layers 3 and 6 at 100% coverage (6 in 2 ). for more information, refer to ti technical brief slma002. recommended operating conditions min max unit input voltage, v i # 2.7 10 v output voltage range, v o tps77501 1.5 5.5 v output voltage range, v o TPS77601 1.2 5.5 v output current, i o (see note 1) 0 500 ma operating virtual junction temperature, t j (see note 1) ?40 125 c # to calculate the minimum input voltage for your maximum output current, use the following equation: v i(min) = v o(max) + v do(max load) . note 1: continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recomm ended that the device operate under conditions beyond those specified in this table for extended periods of time.
sgls012b ? march 2003 ? revised april 2008 7 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating free-air temperature range, v i = v o(typ) + 1 v, i o = 1 ma, en = 0 v, c o = 10 f (unless otherwise noted) parameter test conditions min typ max unit tps77501 1.5 v v o 5.5 v, t j = 25 c v o tps77501 1.5 v v o 5.5 v, t j = ?40 c to 125 c 0.98v o 1.02v o TPS77601 1.2 v v o 5.5 v, t j = 25 c v o v TPS77601 1.2 v v o 5.5 v, t j = ?40 c to 125 c 0.98v o 1.02v o v tps77x15 t j = 25 c, 2.7 v < v in < 10 v 1.5 tps77x15 t j = ?40 c to 125 c, 2.7 v < v in < 10 v 1.470 1.530 tps77516 t j = 25 c, 2.7 v < v in < 10 v 1.6 v output voltage (10 a to 500 ma tps77516 t j = ?40 c to 125 c, 2.7 v < v in < 10 v 1.568 1.632 v output voltage (10 a to 500 ma load) (see note 2) tps77x18 t j = 25 c, 2.8 v < v in < 10 v 1.8 load) (see note 2) tps77x18 t j = ?40 c to 125 c, 2.8 v < v in < 10 v 1.764 1.836 tps77x25 t j = 25 c, 3.5 v < v in < 10 v 2.5 tps77x25 t j = ?40 c to 125 c, 3.5 v < v in < 10 v 2.450 2.550 v tps77628 t j = 25 c, 3.8 v < v in < 10 v 2.8 v tps77628 t j = ?40 c to 125 c, 3.8 v < v in < 10 v 2.744 2.856 tps77x33 t j = 25 c, 4.3 v < v in < 10 v 3.3 tps77x33 t j = ?40 c to 125 c, 4.3 v < v in < 10 v 3.234 3.366 quiescent current (gnd current) 10 a < i o < 500 ma, t j = 25 c 85 a quiescent current (gnd current) en = 0v, (see note 2) i o = 500 ma, t j = ?40 c to 125 c 125 a output voltage line regulation ( ? v o /v o ) (see notes 2 and 3) v o + 1 v < v i 10 v, t j = 25 c 0.01 %/v load regulation 3 mv output noise voltage (tps77x18) bw = 200 hz to 100 khz, i c = 500 ma c o = 10 f, t j = 25 c 53 vrms output current limit v o = 0 v 1.7 2 a thermal shutdown junction temperature 150 c en = v i ,t j = 25 c, 2.7 v < v i < 10 v 1 a standby current en = v i ,t j = ?40 c to 125 c 2.7 v < v i < 10 v 10 a fb input current tps77x01 fb = 1.5 v 2 na high level enable input voltage 1.7 v low level enable input voltage 0.9 v power supply ripple rejection (see note 2) f = 1 khz, c o = 10 f, t j = 25 c 60 db notes: 2. minimum in operating voltage is 2.7 v or v o(typ) + 1 v, whichever is greater. maximum in voltage 10v. 3. if v o 1.8 v then v imin = 2.7 v, v imax = 10 v: line reg. (mv) % v v o v imax 2.7 v 100 1000 if v o 2.5 v then v imin = v o + 1 v, v imax = 10 v: line reg. (mv) % v v o v imax v o 1v 100 1000
sgls012b ? march 2003 ? revised april 2008 8 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating free-air temperature range, v i = v o(typ) + 1 v, i o = 1 ma, en = 0 v, c o = 10 f (unless otherwise noted) (continued) parameter test conditions min typ max unit minimum input voltage for valid reset i o(reset) = 300 a 1.1 v trip threshold voltage v o decreasing 92 98 %v o reset (tps775xx) hysteresis voltage measured at v o 0.5 %v o reset (tps775xx) output low voltage v i = 2.7 v, i o(reset) = 1ma 0.15 0.4 v leakage current v (reset) = 5 v 1 a reset time-out delay 200 ms minimum input voltage for valid pg i o(pg) = 300 a 1.1 v pg trip threshold voltage v o decreasing 92 98 %v o pg (tps776xx) hysteresis voltage measured at v o 0.5 %v o (tps776xx) output low voltage v i = 2.7 v, i o(pg) = 1 ma 0.15 0.4 v leakage current v (pg) = 5 v 1 a input current (en ) en = 0 v ?1 0 1 a input current (en ) en = v i ?1 1 a tps77628 i o = 500 ma, t j = 25 c 285 tps77628 i o = 500 ma, t j = ?40 c to 125 c 410 dropout voltage (see note 4) tps77533 i o = 500 ma, t j = 25 c 169 mv dropout voltage (see note 4) tps77533 i o = 500 ma, t j = ?40 c to 125 c 287 mv tps77633 i o = 500 ma, t j = 25 c 169 tps77633 i o = 500 ma, t j = ?40 c to 125 c 287 note 4: in voltage equals v o (typ) ? 100 mv; tps77x15, tps77516, tps77x18, and tps77x25 dropout voltage limited by input voltage range limitations (i.e., tps77x33 input voltage needs to drop to 3.2 v for purpose of this test). typical characteristics table of graphs figure v o output voltage vs output current 2, 3, 4 v o output voltage vs free-air temperature 5, 6, 7 ground current vs free-air temperature 8 power supply ripple rejection vs frequency 9 output spectral noise density vs frequency 10 z o output impedance vs frequency 11 v do dropout voltage vs input voltage 12 v do dropout voltage vs free-air temperature 13 input voltage (min) vs output voltage 14 line transient response 15, 17 load transient response 16, 18 v o output voltage vs time 19 equivalent series resistance (esr) vs output current 21 ? 24
sgls012b ? march 2003 ? revised april 2008 9 post office box 655303 ? dallas, texas 75265 typical characteristics figure 2 i o ? output current ? a tps77x33 output voltage vs output current 3.2830 3.2815 3.2800 0.1 0.3 3.2825 3.2820 3.2810 0.2 3.2835 0 ? output voltage ? v v o 3.2805 0.4 0.5 v i = 4.3 v t a = 25 c figure 3 i o ? output current ? a 1.4975 1.4960 1.4950 1.4970 1.4965 1.4955 1.4985 ? output voltage ? v v o tps77x15 output voltage vs output current 1.4980 0.1 0.3 0.2 0 0.4 0.5 v i = 2.7 v t a = 25 c figure 4 i o ? output current ? a tps77x25 output voltage vs output current 2.4955 2.4940 2.4920 0.1 0.3 2.4950 2.4945 2.4935 0.2 0.4 2.4960 0 0.5 ? output voltage ? v v o v i = 3.5 v t a = 25 c 2.4930 2.4925 figure 5 t a ? free-air temperature ? c tps77x33 output voltage vs free-air temperature ? output voltage ? v v o 3.31 3.28 3.25 ?40 0 3.30 3.29 3.27 ?20 100 140 3.32 ?60 120 3.26 20 40 60 80 v i = 4.3 v i o = 500 ma i o = 1 ma
sgls012b ? march 2003 ? revised april 2008 10 post office box 655303 ? dallas, texas 75265 typical characteristics figure 6 t a ? free-air temperature ? c tps77x15 output voltage vs free-air temperature ? output voltage ? v v o 1.515 1.500 1.485 ?40 0 1.510 1.505 1.495 ?20 100 ?60 120 1.490 20 40 60 80 v i = 2.7 v i o = 500 ma i o = 1 ma 140 figure 7 t a ? free-air temperature ? c tps77x25 output voltage vs free-air temperature ? output voltage ? v v o ?40 0 ?20 100 ?60 120 20 40 60 80 2.515 2.500 2.480 2.510 2.505 2.495 2.490 2.485 v i = 3.5 v i o = 500 ma i o = 1 ma figure 8 t a ? free-air temperature ? c tps77xxx ground current vs free-air temperature ground current ? a ?40 0 ?20 100 ?60 120 20 40 60 80 140 v i = 2.7 v 100 95 90 85 80 75 i o = 1 ma i o = 500 ma figure 9 psrr ? power supply ripple rejection ? db f ? frequency ? hz power supply ripple rejection vs frequency 70 60 50 40 30 20 10 0 ?10 tps77x33 90 80 10 1 v i = 4.3 v c o = 10 f t a = 25 c 10 2 10 3 10 4 10 5 10 6
sgls012b ? march 2003 ? revised april 2008 11 post office box 655303 ? dallas, texas 75265 typical characteristics figure 10 tps77x33 output spectral noise density vs frequency f ? frequency ? hz 10 2 10 3 10 4 10 5 10 ?5 10 ?6 10 ?8 10 ?7 i o = 7 ma i o = 500 ma v i = 4.3 v c o = 10 f t a = 25 c v hz output spectral noise density ? figure 11 f ? frequency ? khz ? output impedance ? z o ? 10 1 10 2 10 5 10 6 10 0 10 ?1 10 ?2 10 4 10 3 i o = 1 ma i o = 500 ma v i = 4.3 v c o = 10 f t a = 25 c tps77x33 output impedance vs frequency figure 12 v i ? input voltage ? v 300 150 0 34 250 200 100 3.5 2.5 ? dropout voltage ? mv 50 4.5 5 v do 350 t a = 125 c t a = ?40 c t a = 25 c i o = 500 ma tps77x01 dropout voltage vs input voltage figure 13 t a ? free-air temperature ? c ?40 0 20 120 10 3 ?60 40 60 80 100 ? dropout voltage ? mv v do tps77x33 dropout voltage vs free-air temperature 10 2 10 1 10 0 10 ?1 10 ?2 ?20 140 i o = 500 ma i o = 10 ma i o = 0 ma c o = 10 f
sgls012b ? march 2003 ? revised april 2008 12 post office box 655303 ? dallas, texas 75265 typical characteristics figure 14 3 2.7 2 1.5 1.75 2 2.25 2.5 2.75 ? input voltage (min) ? v input voltage (min) vs output voltage 4 3 3.25 3.5 v i v o ? output voltage ? v i o = 0.5 a t a = ?40 c t a = 25 c t a = 125 c v o ? change in 10 0 3.7 2.7 tps77x15 line transient response v i t ? time ? s 060 40 20 80 100 140 120 160 180 200 ? input voltage ? v ? output voltage ? mv c o = 10 f t a = 25 c ?10 figure 15 figure 16 t ? time ? s tps77x15 load transient response i ? output current ? ma o v o ? change in ? output voltage ? mv c o = 2x47 f esr = 1/2x100 m ? v o = 1.5 v v in = 2.7 v 500 0 060 40 20 80 100 140 120 160 180 200 0 50 ?50 tps77x33 line transient response t ? time ? s v o ? change in v i ? input voltage ? v ? output voltage ? mv 5.3 60 40 20 80 100 140 120 160 180 200 c o = 10 f t a = 25 c 0 4.3 10 0 ?10 figure 17
sgls012b ? march 2003 ? revised april 2008 13 post office box 655303 ? dallas, texas 75265 typical characteristics t ? time ? s tps77x33 load transient response i ? output current ? ma o v o ? change in ? output voltage ? mv 500 0 60 40 20 80 100 140 120 160 180 200 0 0 50 ?50 c o = 2x47 f esr = 1/2x100 m ? v o = 3.3 v v i = 4.3 v figure 18 figure 19 t ? time ? ms tps77x33 output voltage vs time (at startup) 3 2 0.3 0.2 0.1 0.4 0.5 0.7 0.6 0.8 0.9 1 0 v o ? output voltage ? v 0 1 4 enable pulse ? v c o = 10 f i o = 500 ma t a = 25 c in en out + gnd c o esr r v i to load r l figure 20. test circuit for typical regions of stability (figures 21 through 24) (fixed output options)
sgls012b ? march 2003 ? revised april 2008 14 post office box 655303 ? dallas, texas 75265 typical characteristics figure 21 esr ? equivalent series resistance ? ? 0.1 0 100 200 300 400 500 typical region of stability equivalent series resistance ? vs output current 10 i o ? output current ? ma 1 0.01 v o = 3.3 v c o = 4.7 f v i = 4.3 v t a = 25 c region of stability region of instability region of instability figure 22 typical region of stability equivalent series resistance ? vs output current i o ? output current ? ma esr ? equivalent series resistance ? ? 0.1 0 100 200 300 400 500 10 1 v o = 3.3 v c o = 4.7 f v i = 4.3 v t j = 125 c region of stability region of instability 0.01 region of instability figure 23 esr ? equivalent series resistance ? ? 0.1 0 100 200 300 400 500 typical region of stability equivalent series resistance ? vs output current 10 i o ? output current ? ma 1 region of instability region of stability v o = 3.3 v c o = 22 f v i = 4.3 v t a = 25 c 0.01 region of instability figure 24 esr ? equivalent series resistance ? ? typical region of stability equivalent series resistance ? vs output current 0.1 0 100 200 300 400 500 10 1 i o ? output current ? ma region of stability region of instability v o = 3.3 v c o = 22 f v i = 4.3 v t j = 125 c 0.01 region of instability ? equivalent series resistance (esr) refers to the total series resistance, including the esr of the capacitor, any series resist ance added externally, and pwb trace resistance to c o .
sgls012b ? march 2003 ? revised april 2008 15 post office box 655303 ? dallas, texas 75265 application information the tps775xx family includes five fixed-output voltage regulators (1.5 v, 1.6 v, 1.8 v, 2.5 v, and 3.3 v), and an adjustable regulator, the tps77501 (adjustable from 1.5 v to 5.5 v). the tps776xx family includes five fixed-output voltage regulators (1.5 v, 1.8 v, 2.5 v, 2.8 v, and 3.3 v), and an adjustable regulator, the TPS77601 (adjustable from 1.2 v to 5.5 v). device operation the tps775xx and tps776xx feature very low quiescent current, which remains virtually constant even with varying loads. conventional ldo regulators use a pnp pass element, the base current of which is directly proportional to the load current through the regulator (i b = i c / ). the tps775xx and tps776xx use a pmos transistor to pass current; because the gate of the pmos is voltage driven, operating current is low and invariable over the full load range. another pitfall associated with the pnp-pass element is its tendency to saturate when the device goes into dropout. the resulting drop in forces an increase in i b to maintain the load. during power up, this translates to large start-up currents. systems with limited supply current may fail to start up. in battery-powered systems, it means rapid battery discharge when the voltage decays below the minimum required for regulation. the tps775xx and tps776xx quiescent currents remain low even when the regulator drops out, eliminating both problems. the tps775xx and tps776xx families also feature a shutdown mode that places the output in the high-impedance state (essentially equal to the feedback-divider resistance) and reduces quiescent current to 2 a. if the shutdown feature is not used, en should be tied to ground. minimum load requirements the tps775xx and tps776xx families are stable even at zero load; no minimum load is required for operation. fb?pin connection (adjustable version only) the fb pin is an input pin to sense the output voltage and close the loop for the adjustable option . the output voltage is sensed through a resistor divider network to close the loop as it is shown in figure 26. normally, this connection should be as short as possible; however, the connection can be made near a critical circuit to improve performance at that point. internally, fb connects to a high-impedance wide-bandwidth amplifier and noise pickup feeds through to the regulator output. routing the fb connection to minimize/avoid noise pickup is essential. external capacitor requirements an input capacitor is not usually required; however, a ceramic bypass capacitor (0.047 f or larger) improves load transient response and noise rejection if the tps775xx or tps776xx are located more than a few inches from the power supply. a higher-capacitance electrolytic capacitor may be necessary if large (hundreds of milliamps) load transients with fast rise times are anticipated. like all low dropout regulators, the tps775xx and tps776xx require an output capacitor connected between out and gnd to stabilize the internal control loop. the minimum recommended capacitance value is 10 f and the esr (equivalent series resistance) must be between 50 m ? and 1.5 ? . capacitor values 10 f or larger are acceptable, provided the esr is less than 1.5 ? . solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described previously.
sgls012b ? march 2003 ? revised april 2008 16 post office box 655303 ? dallas, texas 75265 application information external capacitor requirements (continued) reset / pg out out 7 6 5 in in en gnd 3 16 14 13 v i c1 0.1 f reset /pg v o 10 f + c o 250 k ? figure 25. typical application circuit (fixed versions) programming the tps77x01 adjustable ldo regulator the output voltage of the tps77x01 adjustable regulator is programmed using an external resistor divider as shown in figure 26. the output voltage is calculated using: v o v ref 1 r1 r2 ( 1) where: v ref = 1.1834 v typ (the internal reference voltage) resistors r1 and r2 should be chosen for approximately 10- a divider current. lower value resistors can be used but offer no inherent advantage and waste more power. higher values should be avoided as leakage currents at fb increase the output voltage error. the recommended design procedure is to choose r2 = 110 k ? to set the divider current at approximately 10 a and then calculate r1 using: r1 v o v ref 1 r2 (2) output voltage r1 r2 2.5 v 3.3 v 3.6 v 4.75 v unit 121 196 226 332 110 110 110 110 k ? k ? k ? k ? output voltage programming guide v o v i reset / pg out fb / nc r1 r2 gnd en in 0.9 v 1.7 v tps77x01 reset or pg output 0.1 f 250 k ? c o figure 26. tps77x01 adjustable ldo regulator programming
sgls012b ? march 2003 ? revised april 2008 17 post office box 655303 ? dallas, texas 75265 application information reset indicator the tps775xx features a reset output that can be used to monitor the status of the regulator. the internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal regulated value, the reset output transistor turns on, taking the signal low. the open-drain output requires a pullup resistor. if not used, it can be left floating. reset can be used to drive power-on reset circuitry or as a low-battery indicator. reset does not assert itself when the regulated output voltage falls outside the specified 2% tolerance, but instead reports an output voltage low relative to its nominal regulated value (refer to timing diagram for start-up sequence). power-good indicator the tps776xx features a power-good (pg) output that can be used to monitor the status of the regulator. the internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal regulated value, the pg output transistor turns on, taking the signal low. the open-drain output requires a pullup resistor. if not used, it can be left floating. pg can be used to drive power-on reset circuitry or used as a low-battery indicator. regulator protection the tps775xx and tps776xx pmos-pass transistors have a built-in back diode that conducts reverse currents when the input voltage drops below the output voltage (e.g., during power down). current is conducted from the output to the input and is not internally limited. when extended reverse voltage is anticipated, external limiting may be appropriate. the tps775xx and tps776xx also feature internal current limiting and thermal protection. during normal operation, the tps775xx and tps776xx limit output current to approximately 1.7 a. when current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. while current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. if the temperature of the device exceeds 150 c(typ), thermal-protection circuitry shuts it down. once the device has cooled below 130 c(typ), regulator operation resumes.
sgls012b ? march 2003 ? revised april 2008 18 post office box 655303 ? dallas, texas 75265 application information power dissipation and junction temperature specified regulator operation is assured to a junction temperature of 125 c; the maximum junction temperature should be restricted to 125 c under normal operating conditions. this restriction limits the power dissipation the regulator can handle in any given application. to ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, p d(max) , and the actual dissipation, p d , which must be less than or equal to p d(max) . the maximum-power-dissipation limit is determined using the following equation: p d(max) t j max t a r ja where: t j max is the maximum allowable junction temperature. t a is the ambient temperature. r ja is the thermal resistance junction-to-ambient for the package, i.e., 32.6 c/w for the 20-terminal pwp with no airflow. the regulator dissipation is calculated using: p d v i v o i o power dissipation resulting from quiescent current is negligible. excessive power dissipation will trigger the thermal protection circuit.
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) tps77501qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77515qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77518qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77525qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77533qpwprq1 active htssop pwp 20 1 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr TPS77601qpwprg4q1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr TPS77601qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77615qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77618qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77625qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr tps77633qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti package option addendum www.ti.com 25-sep-2009 addendum-page 1
to customer on an annual basis. other qualified versions of tps77501-q1, tps77515-q1, tps77518-q1, tps77525-q1, tps77533-q1, TPS77601-q1, tps77615-q1, tps77618-q1, tps77625-q1, tps77633-q1 : ? catalog: tps77501 , tps77515 , tps77518 , tps77525 , tps77533 , TPS77601 , tps77615 , tps77618 , tps77625 , tps77633 ? enhanced product: tps77501-ep , tps77515-ep , tps77518-ep , tps77525-ep , tps77533-ep , TPS77601-ep , tps77615-ep , tps77618-ep , tps77625-ep , tps77633-ep note: qualified version definitions: ? catalog - ti's standard catalog product ? enhanced product - supports defense, aerospace and medical applications package option addendum www.ti.com 25-sep-2009 addendum-page 2
package option addendum www.ti.com 26-apr-2016 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples tps77501qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 125 77501q1 tps77515qpwprq1 obsolete htssop pwp 20 tbd call ti call ti -40 to 125 77515q1 tps77518qpwprq1 obsolete htssop pwp 20 tbd call ti call ti -40 to 125 77518q1 tps77525qpwprq1 obsolete htssop pwp 20 tbd call ti call ti -40 to 125 7525q1 tps77533qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 125 77533q1 TPS77601qpwprg4q1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 125 77601q1 TPS77601qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 125 77601q1 tps77615qpwprq1 obsolete htssop pwp 20 tbd call ti call ti -40 to 125 77615q1 tps77618qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 125 77618q1 tps77625qpwprq1 obsolete htssop pwp 20 tbd call ti call ti -40 to 125 77625q1 tps77633qpwprq1 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-3-260c-168 hr -40 to 125 77633q1 (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. - the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature.
package option addendum www.ti.com 26-apr-2016 addendum-page 2 (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device. (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. other qualified versions of tps77515-q1, tps77518-q1, tps77525-q1, tps77533-q1, tps77615-q1, tps77618-q1, tps77625-q1, tps77633-q1 : ? catalog: tps77515 , tps77518 , tps77525 , tps77533 , tps77618 , tps77625 , tps77633 ? enhanced product: tps77515-ep , tps77518-ep , tps77525-ep , tps77533-ep , tps77615-ep , tps77618-ep , tps77625-ep , tps77633-ep note: qualified version definitions: ? catalog - ti's standard catalog product ? enhanced product - supports defense, aerospace and medical applications

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