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rp500x series 600ma ? step-down dc/dc converter with synchronous rectifier no.ea-155-100802 1 outline the rp500x series are cmos-based 600ma ? step-down dc/dc converters wi th synchronous rectifier. each of these ics consists of an oscillator, a swit ching control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, protection circuits, uvlo circuit, switching transistors, and so on. a low ripple, high efficiency step-down dc/dc converter can be easily comp osed of this ic with only an inductor and capacitors. in terms of the output voltage, since the feedback resistances are built-in, the voltage is fixed internally. 0.1v step output can be set by laser-trim and 1.5% or 24mv to lerance depending on the output voltage is guaranteed. mode alternative circuit works automatically for improvi ng the efficiency. considering fixed noise frequency, pwm fixed control type is also available. as protection circuits, the current limit circuit which lim its peak current of lx at ea ch clock cycle, and the latch type protection circuit which works if the term of the over-current condition keeps on a certain time exist. the latch-type protection circuit works to latch an internal driv er with keeping it disable. to release the condition of the protection, after disabling this ic with a chip enable ci rcuit, enable it again, or restart this ic with power-on or make the supply voltage at uvlo detector threshold level or lower than uvlo. since packages are wlcsp-6-p2, dfn1616-6, dfn( plp)1820-6, sot-23-6w, high density mounting on boards is possible. ? )this is an approximate value, because output cu rrent depends on conditions and external parts. features ? supply curre nt ......................................................typ. 400 a (at pwm mode) typ. 100 a (at vfm mode) ? standby curr ent ....................................................max. 5 a ? input voltage range .............................................2.55v to 5.50v ? output voltage range...........................................1.1v to 3.3v (0.1v steps) ( for other voltages, please refer to mark informations.) ? output voltage accuracy....................................... 1.5% (v out 1.6v), 24mv (v out <1.6v) ? temperature-drift coefficient of output voltage ...typ. 100ppm/ c ? oscillator frequen cy .............................................typ. 1.2mhz ? oscillator maximum du ty cycle ............................min. 100% ? built-in driver on resi stance ...............................typ. pch. 0.3 , nch. 0.38 (v in = 3.6v) ? uvlo detector thre shold.....................................typ. 2.2v ? soft start time.......................................................typ. 120 s ? lx current li mit.....................................................typ. 900ma ? latch type protection circuit .................................typ. 1.5ms ? two choices of switchi ng mode............................automatic pwm/vf m mode change / pwm fixed ? packages .............................................................. wlcsp-6-p2, dfn1616-6, dfn(plp)1820-6, sot-23-6w applications ? power source for battery-powered equipment. ? power source for hand-held communication equipment, cameras, vcrs, camcorders. ? power source for hdd, portable equipment.
rp500x 2 block diagrams rp500xxx1a/2a ce v in agnd l x chip enable ramp com p ensation current feedback current protection switching control uvlo osc vref v out pwm control soft start pgnd ? ? ) only rp500xxx1a for automatic pwm/vfm mode change rp500xxx3a/4a ce v in agnd l x chip enable ramp com p ensation current feedback current protection switching control uvlo osc vref v out pwm control soft start pgnd ? ? ) only rp500xxx3a for automatic pwm/vfm mode change
rp500x 3 selection guide the output voltage, switching mode, and auto discharge f unction for the ics can be selected at the user?s request. product name package quantity per reel pb free halogen free rp500zxx ? a-e2-f wlcsp-6-p2 5,000 pcs yes yes rp500lxx ? a-tr dfn1616-6 5,000 pcs yes yes rp500kxx ? a-tr dfn(plp)1820-6 5,000 pcs yes yes rp500nxx ? a-tr-fe sot-23-6w 3,000 pcs yes yes xx : the output voltage can be designated in the rang e from 1.1v(11) to 3.3v(33) in 0.1v steps ? 1 . (for other voltages, please refer to mark informations.) ? : the switching mode, and auto discharge function can be designated. code modulation method auto discharge function 1 pwm/vfm auto switching no 2 pwm fixed no 3 pwm/vfm auto switching yes 4 pwm fixed yes (the rp500kxx3a does not exist. please use rp500lxx3a.) ? 1) 0.05v step is also available as a custom code.
rp500x 4 pin configurations ? wlcsp-6-p2 ? dfn1616-6 mark side 6 5 4 1 2 3 bump side 6 5 4 1 2 3 top view 3 4 2 5 1 6 bottom view 1 6 2 5 3 4 ? ? dfn(plp)1820-6 ? sot-23-6w top view 6 5 4 1 2 3 bottom view 4 56 3 2 1 6 5 4 123 (mark side) pin descriptions ? wlcsp-6-p2, sot-23-6w pin no symbol pin description 1 v out output pin 2 pgnd ground pin 3 lx lx switching pin 4 v in input pin 5 agnd ground pin 6 ce chip enable pin ("h" active) ? dfn1616-6, dfn(plp)1820-6 pin no symbol pin description 1 ce chip enable pin ("h" active) 2 agnd ground pin 3 v in input pin 4 lx lx switching pin 5 pgnd ground pin 6 v out output pin ? ) tab is gnd level. (they are connected to the reverse side of this ic.) the tab is better to be connected to the gn d, but leaving it open is also acceptable.
rp500x 5 absolute maximum ratings agnd = pgnd = 0v symbol item rating unit v in input voltage ? 0.3 to 6.5 v v lx lx pin voltage ? 0.3 to v in + 0.3 v v ce ce pin input voltage ? 0.3 to 6.5 v v out output voltage ? 0.3 to 6.5 v i lx lx pin output current 800 ma power dissipation (wlcsp-6-p2) ? 650 power dissipation (dfn1616-6) ? 640 power dissipation (dfn(plp)1820-6) ? 880 p d power dissipation (sot-23-6w) ? 430 mw t opt operating temperature range ? 40 to 85 c t stg storage temperature range ? 55 to 125 c ? ) for power dissipation, please refer to package information. absolute maximum ratings electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safe ty for both device and sy stem using the device in the field. the functional operation at or over these absolute maximum ratings is not assured.
rp500x 6 electrical characteristics ? rp500x topt = 25 c symbol item conditions min. typ. max. unit v in operating input voltage 2.55 5.5 v v out 1.6v 0.985 1.015 v v out output voltage v in = v ce = 3.6v or set v out + 1v v out < 1.6v ? 24 24 mv v out / t opt output voltage temperature coefficient ? 40 c t opt 85 c 100 ppm / c f osc oscillator frequency v in = v ce = 3.6v or set v out + 1v 0.96 1.2 1.44 mhz i dd1 supply current 1 v in = v ce = 5.5v, v out = 0v 400 500 a pwm/vfm 100 160 i dd2 supply current 2 v in = v ce = v out = 5.5v pwm fixed 400 500 a i standby standby current v in = 5.5v, v ce = 0v 0 5 a r onp on resistance of pch tr. v in = 3.6v, i lx =? 100ma 0.3 r onn on resistance of nch tr. v in = 3.6v, i lx =? 100ma 0.38 i lxleakh lx leakage current "h" v in = v lx = 5.5v, v ce = 0v ? 1 0 5 a i lxleakl lx leakage current "l" v in = 5.5v, v ce = v lx = 0v ? 5 0 1 a i vouth v out "h" input current ? 1 v in = v out = 5.5v, v ce = 0v ? 1 0 1 a i voutl v out "l" input current v in = 5.5v, v ce = v out = 0v ? 1 0 1 a i ceh ce "h" input current v in = v ce = 5.5v ? 1 0 1 a i cel ce "l" input current v in = 5.5v, v ce = 0v ? 1 0 1 a v ceh ce input voltage "h" v in = 5.5v 1.0 v v cel ce input voltage "l" v in = 5.5v 0.4 v maxduty oscillator maximum duty cycle 100 % t start soft-start time v in = v ce = 3.6v or set v out + 1v 120 150 s i lxlim lx current limit v in = v ce = 3.6v or set v out + 1v 600 900 ma t prot protection delay time v in = v ce = 3.6v or set v out + 1v 0.5 1.5 5.0 ms v uvlo1 uvlo detector threshold v in = v ce 2.1 2.2 2.3 v v uvlo2 uvlo released voltage v in = v ce 2.2 2.3 2.4 v r low low output nch tr. on resistance ? 2 v in = 3.6v, v ce = 0v 80 test circuit is "open loop" and agnd = pgnd = 0v unless otherwise noted. ? 1) without auto discharge version only ? 2) with auto discharge version only recommended operating conditions (electrical characteristics) all of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. the semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. and the semiconductor de vices may receive serious damage when they continue to operate over the recommended operating conditions.
rp500x 7 test circuits rp500x series v in ce l x v out pgnd a gnd oscilloscope rp500x series v in ce l x v out pgnd a gnd oscilloscope output voltage oscillator frequency rp500x series v in ce l x v out pgnd a gnd a rp500x series v in ce l x v out pgnd a gnd a supply current 1,2 standby current rp500x series v in ce l x v out pgnd a gnd a rp500x series v in ce l x v out pgnd a gnd a ce "h"/"l" input current v out "h"/"l" current
rp500x 8 rp500x series v in ce l x v out pgnd a gnd a rp500x series v in ce l x v out pgnd a gnd oscilloscope lx leakage current ce input voltage rp500x series v in ce l x v out pgnd a gnd v oscilloscope rp500x series v in ce l x v out pgnd a gnd oscilloscope pch ? nch transistor on resistance / soft-start time output delay for protection / lx current limit rp500x series v in ce l x v out pgnd a gnd oscilloscope uvlo detector threshold ? released voltage
rp500x 9 typical application v in ce l x v out pgnd a gnd v in c in 10 f c out 10 f v out 4.7 symbol parts recommendation c in 10 f ceramic c2012jb0j106k (tdk) c out 10 f ceramic c2012jb0j106k (tdk) l 4.7 h vlf3010at-4r7mr30 technical notes when using these ics, consider the following points: ? set the same level as agnd and pgnd. ? set external components such as an inductor, c in , c out as close as possible to the ic, in particular, minimize the wiring to v in pin and pgnd pin. reinforce the v in , pgnd, and v out lines sufficiently. large switching current may flow in these lines. if the impedance of v in and pgnd lines is too large, the internal voltage level in this ic may shift caused by the switching current, and the operation might be unstable. the wiring between v out and load and between l and v out should be separated. ? use an external capacitor c in between v in and gnd, and c out with a capacity of 10f or more ceramic type. ? choose an inductor with inductance range from 4.7 h to 10 h. the phase compensation has been made by these values with output capacitors. the recommendation characteristics of the indu ctor are low dc resistance, large enough permissible current, and strong against t he magnetic saturation. inductance value may shift depending on an inductor. if the inductance value at an actual load current is low, lx peak current may increase and may overlap the lx current limit. as a result, over curr ent protection may work. ? over current protection circuit may be affected by self-heating and heat radiation environment. ? the performance of power source circuits using t hese ics extremely depends upon the peripheral circuits. pay attention in the selection of the peripheral circuits. in particular, design the peripheral circuits in a way that the values such as voltage, current, and power of each component, pcb patterns and the ic do not exceed their respected rated values. (such as the voltage, current, and power)
rp500x 10 operation of step-down dc/dc converter and output current the dc/dc converter charges energy in the inductor when l x transistor is on, and discharges the energy from the inductor when l x transistor is off and controls with less energy loss, so that a lower output voltage than the input voltage is obtained. the operation will be explained with reference to the following diagrams: pch t r l nch t r v in i1 v out cl i2 gnd t=1/fosc ton toff topen ilmin ilmax il i1 i2 ? step 1 : pch tr. turns on and current il ( = i1) flows, and energy is charged into cl. at this moment, il increases from il min ( = 0) to reach il max in proportion to the on-time period (t on ) of pch tr. ? step 2 : when pch tr. turns off, sync hronous rectifier nch tr. turns on in order that l maintains il at il max , and current il ( = i2) flows. ? step 3: il ( = i2) decreases gradually and reaches il = il min = 0 after a time period of t open , and nch tr. turns off. provided that in the continuous mode, next cycle starts befor e il becomes to 0 because t off time is not enough. in this case, il value increases from this il min (>0). in the case of pwm control system , the output voltage is maintained by controlling the on-time period (t on ), with the oscillator frequency (f osc ) being maintained constant. the maximum value (il max ) and the minimum value (il min ) of the current flowing through the inductor are the same as those when pch tr. turns on and off. the difference between il max and ilmin, which is represented by i: ? i = il max ? il min = v out t open / l = (v in ? v out ) t on / l ..........................................e quation 1 wherein, t = 1 / f osc = t on + t off duty (%) = t on / t 100 = t on f osc 100 t open t off in equation 1, v out t open / l and (v in ? v out ) t on / l respectively show the change of the current at "on", and the change of the current at "off".
rp500x 11 discontinuous mode a nd continuous mode when the output current (i out ) is relatively small, t open < t off as illustrated in the follow ing diagram. in this case, the energy is charged in the inductor during the time peri od of ton and is discharged in its entirely during the time period of t off , therefore il min becomes to zero (il min = 0). when i out is gradually increased, eventually, t open becomes to t off (t open = t off ), and when i out is further increased, il min becomes larger than zero (il min >0). the former mode is referred to as the discontinuous mode and the latter mode is referred to as continuous mode. discontinuous mode continuous mode ilmax ilmin ton toff t=1/fosc topen il t ilmax ilmin ton toff t=1/fosc il iconst t in the continuous mode, when equation 1 is solved for t on and assumed that the solution is t onc , t onc = t v out / v in ....................................................................................................... equat ion 2 when t on rp500x 12 ripple current is as follows: i rp = (v in ? v out ? r onp i out ? r l i out ) d on / f osc / l..............................................equation 6 wherein, peak current that flows through l, and l x tr. is as follows: ilx max = i out + i rp / 2 .....................................................................................................e quation 7 consider ilx max , condition of input and output and select external components. ? the above explanation is directed to the calculat ion in an ideal case in continuous mode.
rp500x 13 timing chart (1) soft start time ? in the case of starting this ic with ce in the case of starting this ic with ce, the operation can be as in the timing chart below. when the voltage of ce pin (v ce ) is beyond the threshold level, the oper ation of the ic starts. the threshold voltage of ce pin is in between ce "h" input voltage (v ceh ) and ce "l" input voltage (v cel ) described in the electrical characteristics table. soft-start circuit op erates, and after the certain time, the reference voltage inside the ic (v ref ) is rising gradually up to the constant value. v ceh soft-start time ic internal voltage reference v cel threshold level lx voltage (v ce ) (v ref ) soft-start circuit operating ( v lx ) depending on power supply, load current, external components (v out ) output voltage ce pin input voltage pwm mode operating during the soft-start time soft-start time is the time interval from soft start ci rcuit starting point to the reference voltage level reaching point up to this constant level. ? soft start time is not always equal to the turn-on speed of dc/dc converter. the power supply capacity for this ic, load current, inductance and capacitance values affect the turn-on speed. ? in the case of starting with power supply in the case of starting with power supply, when the input voltage (v in ) is larger than uvlo released voltage (v uvlo2 ), soft start circuit operates, and after that, t he same explanation above is applied to the operation. soft-start time is the time interval from soft start ci rcuit starting point to the reference voltage level reaching point up to this constant level. output voltage input voltage v uvlo2 ic internal voltage reference v uvlo1 lx voltage set v out set v out soft-start time depending on power supply, load current, external components pwm mode operating during the soft-start time (v out ) (v in ) (v ref ) (v lx ) ? turn-on speed is affected by next conditions; (a) input voltage (v in ) rising speed depending on the power supplier to the ic and input capacitor c in . (b) output capacitor c out value and load current value.
rp500x 14 (2) under voltage lockout (uvlo) circuit the step-down dc/dc converter stops and on duty becomes 100%, if input voltage (v in ) becomes less than the set output voltage (set v out ), the output voltage (v out ) gradually drops according to the input voltage (v in ). if the input voltage drops more and becomes less than uvlo detector threshold (v uvlo1 ), the under voltage lockout circuit (uvlo) operat es, the ic internal reference voltage (v ref ) stops, switching transistors turn off and the output voltage drops according to the load and output capacitor c out value. to restart the normal operation, the input voltage (v in ) must be more than the uvlo released voltage (v uvlo2 ). the timing chart below describes the operation with varying the input voltage (v in ). v uvlo2 v uvlo1 set v out set v out output voltage input voltage ic internal voltage reference lx voltage soft-start time depending on power supply, load current, external components (v out ) (v in ) (v ref ) (v lx ) ? actually, the waveform of v out at uvlo working and releasing varies depending on the initial voltage of c out and load current situation.
rp500x 15 (3) over current protection circuit, latch type protection circuit over current protection circuit superv ises the coil peak current (the curr ent flowing pch transistor) at each switching cycle, and if the current beyond the lx current limit (i lxlim ), pch transistor is turned off. the lx current limit of rp500x is typ.900ma. further, if the over current status continues equal or longer than pr otection delay time, or, when the lx limit current is exceeded even once when the driver operates by duty 100%, a built-in driver is latched in the off state and the operation of dc/dc converter stops. ? lx current limit and protection delay time is affect ed by self-heating and ambient environment. if the output is short and the input voltage (v in ) is drastically dropped or becomes unstable, the protection operation and delay time may vary. protection delay time (t prot ) lx current limit (i lx lim ) lx current pch tr. current lx voltage (v lx ) to release the condition of latch type protection, restart this ic by inputting "l" signal to ce pin, or restart this ic with power-on or make the supply voltage lower than uvlo detector threshold (v uvlo1 ) level. the timing chart shown below describes the changing pr ocess of input voltage rising, stable operating, operating with large current, reset with ce pin, st able operating, input voltage falling, input voltage recovering, and stable operating. if too large current flows through the circuit because of short or other reasons, after the delay time of latch type protection a built-in driver is latched in the off state and v lx signal will be "l", then output will turn off. at the point (1), release the latch type protection is rea lized with ce reset as changed ce signal from "l" to "h". at the point (2), release the latch type protection is realized with uvlo reset as make the supply voltage lower than uvlo detector threshold (v uvlo1 ) level. input voltage (v in ) set v out uvlo detect voltage (v uvlo1 ) ce pin input voltage (v ce ) set v out threshold level lx voltage (v lx ) set v out output voltage (v out ) uvlo release voltage (v uvlo2 ) 1 2 soft-start time set v out soft-start time soft-start time stable operation protection delay time protection delay time uvlo reset ce reset latch-type protection latch-type protection stable operation stable operation
rp500x 16 typical characteristics 1) output voltage vs. output current rp500x121a/123a rp500x181a/183a 1.0 1.1 1.4 1.2 1.3 output current i out (ma) output voltage v out (v) 10 100 1 1000 v in =5v v in =3.6v 1.6 1.7 2.0 1.8 1.9 output current i out (ma) output voltage v out (v) 10 100 1 1000 v in =5v v in =3.6v rp500x251a/253a rp500x331a/333a 2.3 2.4 2.7 2.5 2.6 output current i out (ma) output voltage v out (v) 10 100 1 1000 v in =5v v in =3.6v 3.1 3.2 3.5 3.3 3.4 output current i out (ma) output voltage v out (v) 10 100 1 1000 v in =5v v in =4.3v rp500x152a/154a 1.3 1.4 1.7 1.5 1.6 output current i out (ma) output voltage v out (v) 10 100 1 1000 v in =5v v in =3.6v
rp500x 17 2) output voltage vs. input voltage rp500x121a/123a rp500x251a/253a 3.0 5.0 4.5 4.0 3.5 5.5 input voltage v in (v) output voltage v out (v) 1.17 1.23 1.19 1.18 1.21 1.20 1.22 i out =1ma i out =50ma i out =200ma 2.6 4.6 4.1 3.6 3.1 5.1 input voltage v in (v) output voltage v out (v) 2.44 2.56 2.48 2.46 2.52 2.50 2.54 i out =1ma i out =50ma i out =200ma rp500x331a/333a rp500x152a/154a 3.0 5.0 4.5 4.0 3.5 5.5 input voltage v in (v) output voltage v out (v) 3.24 3.36 3.28 3.26 3.32 3.30 3.34 i out =1ma i out =50ma i out =200ma 3.0 5.0 4.5 4.0 3.5 5.5 input voltage v in (v) output voltage v out (v) 1.47 1.53 1.49 1.48 1.51 1.50 1.52 i out =1ma i out =50ma i out =200ma 3) efficiency vs. output current rp500x121a/123a rp500x181a/183a 40 50 100 70 90 60 80 output current i out (ma) 10 100 1 1000 v in =2.5v v in =3.6v v in =5v efficiency (%) 40 50 100 70 90 60 80 output current i out (ma) 10 100 1 1000 efficiency (%) v in =5v v in =3.6v
rp500x 18 rp500x251a/253a rp500x331a/333a 40 50 100 70 90 60 80 output current i out (ma) 10 100 1 1000 efficiency (%) v in =5v v in =3.6v 40 50 100 70 90 60 80 output current i out (ma) 10 100 1 1000 efficiency (%) v in =5v v in =4.3v rp500x152a/154a 40 50 100 70 90 60 80 output current i out (ma) 10 100 1 1000 efficiency (%) v in =5v v in =3.6v 4) supply current 1, 2 vs. temperature 5) supply current 1, 2 vs. input voltage rp500x15xa rp500x15xa 0 500 300 400 100 200 -40 75 50 025 -25 85 temperature topt ( c) v in =v ce =5.5v supply current i dd ( a) i dd1 i dd2 i dd1 i dd2 2.5 4.5 3.5 5.5 input voltage v in (v) supply current i dd ( a) 0 500 300 100 400 200
rp500x 19 6) dc/dc output waveform (c in = c out = 10 f, l = 4.7 h) rp500x121a/123a rp500x12xa 0 0.5 1.5 1.0 time t (ms) output voltage v out (v) 1.14 1.26 1.22 1.18 1.24 1.20 1.16 i out =1ma 01 3 2 time t ( s) output voltage v out (v) 1.16 1.24 1.22 1.18 1.20 i out =200ma rp500x251a/253a rp500x25xa 0 0.5 1.5 1.0 time t (ms) output voltage v out (v) 2.44 2.56 2.52 2.48 2.54 2.50 2.46 i out =1ma 01 3 2 time t ( s) output voltage v out (v) 2.46 2.54 2.52 2.48 2.50 i out =200ma rp500x331a/333a rp500x33xa 0 0.5 1.5 1.0 time t (ms) output voltage v out (v) 3.24 3.36 3.32 3.28 3.34 3.30 3.26 i out =1ma 01 3 2 time t ( s) output voltage v out (v) 3.26 3.34 3.32 3.28 3.30 i out =200ma
rp500x 20 7) output voltage vs. temperature rp500x15xa rp500x33xa 1.47 1.53 1.49 1.51 1.48 1.50 1.52 -40 75 50 025 -25 85 temperature topt ( c) output voltage v out (v) 3.24 3.36 3.28 3.32 3.26 3.30 3.34 -40 75 50 025 -25 85 temperature topt ( c) output voltage v out (v) 8) oscillator frequency vs. temperature 9) oscillator frequency vs. input voltage rp500x15xa rp500x15xa 1050 1350 1150 1250 1100 1200 1300 -40 75 50 025 -25 85 temperature topt ( c) frequency f osc (khz) v in =3.6v 1050 1350 1150 1250 1100 1200 1300 2.5 4.5 3.5 5.5 input voltage v in (v) frequency f osc (khz) i out =-40 c i out =25 c i out =85 c 10) soft-start time vs. temperature 11) uvlo detector threshold/ released voltage vs. temperature rp500x16xa rp500x15xa 100 160 120 140 110 130 150 -40 75 50 025 -25 85 temperature topt ( c) soft start time t start ( s) uvlo detector threshold uvlo released voltage 2.1 2.5 2.3 2.2 2.4 -40 75 50 025 -25 85 temperature topt ( c) uvlo voltage v uvlo (v)
rp500x 21 12) ce input vs. temperature 13) lx current limit vs. temperature rp500x15xa rp500x15xa 0 1.0 0.4 0.8 0.2 0.6 -40 75 50 025 -25 85 temperature topt ( c) ce input threshold voltage v ce (v) 600 1000 700 900 800 -40 75 50 025 -25 85 temperature topt ( c) l x limit current i lxlimit (ma) 14) nch tr. on resistance vs. temperature 15) pch tr. on resistance vs. temperature rp500x15xa rp500x15xa 0 0.6 0.2 0.4 0.5 0.1 0.3 -40 75 50 025 -25 85 temperature topt ( c) nchtr. on resistance r onn ( ) 0 0.6 0.2 0.4 0.5 0.1 0.3 -40 75 50 025 -25 85 temperature topt ( c) pchtr. on resistance r onp ( ) 16) turn on speed with ce pin (c in = c out = ceramic 10 f, l = 4.7 h) rp500x111a/113a (i out = 1.1ma) rp500x251a/253a (i out = 2.5ma) 2 0 0 400 100 300 200 output voltage v out (v) output voltage 0 0.4 0.6 0.8 1.2 1.0 0.2 4 time t ( s) ce input voltage ce input voltage v ce (v) v in =3.6v 3 0 0 400 100 300 200 output voltage v out (v) output voltage 0 1.0 1.5 2.0 3.0 2.5 0.5 6 time t ( s) ce input voltage ce input voltage v ce (v) v in =5v
rp500x 22 rp500x331a/333a (i out = 3.3ma) rp500x152a/154a (i out = 1.5ma) 3 0 0 400 100 300 200 output voltage v out (v) output voltage 0 1 2 4 3 6 time t ( s) ce input voltage ce input voltage v ce (v) v in =5v 2 0 0 400 100 300 200 output voltage v out (v) output voltage 0 0.5 1.0 2.0 1.5 4 time t ( s) ce input voltage ce input voltage v ce (v) v in =3.6v 17) load transient response (c in = c out = ceramic 10 f, l = 4.7 h) rp500x121a/123a rp500x121a/123a 1.20 1.15 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 1.25 1.10 time t ( s) output current i out (ma) v in =3.6v output current 0ma 200ma 1.25 1.20 0 1000 200 600 800 400 output voltage v out (v) output voltage 0 200 1.30 1.15 time t ( s) output current i out (ma) v in =3.6v output current 200ma 0ma rp500x12xa rp500x12xa 1.20 1.15 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 1.25 time t ( s) output current i out (ma) v in =3.6v output current 100ma 400ma 1.25 1.20 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 1.30 1.15 time t ( s) output current i out (ma) v in =3.6v output current 400ma 100ma
rp500x 23 rp500x251a/253a rp500x251a/253a 2.50 2.45 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 2.55 2.40 time t ( s) output current i out (ma) v in =5.0v output current 0ma 200ma 2.55 2.50 0 1000 200 600 800 400 output voltage v out (v) output voltage 0 200 2.60 2.45 time t ( s) output current i out (ma) v in =5.0v output current 200ma 0ma rp500x25xa rp500x25xa 2.50 2.45 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 2.55 time t ( s) output current i out (ma) v in =5.0v output current 100ma 400ma 2.50 2.45 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 2.55 time t ( s) output current i out (ma) v in =5.0v output current 400ma 100ma rp500x331a/333a rp500x331a/333a 3.30 3.25 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 3.35 3.20 time t ( s) output current i out (ma) v in =5.0v output current 0ma 200ma 3.35 3.30 0 1000 200 600 800 400 output voltage v out (v) output voltage 0 200 3.40 3.25 time t ( s) output current i out (ma) v in =5.0v output current 200ma 0ma
rp500x 24 rp500x33xa rp500x33xa 3.30 3.25 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 3.35 time t ( s) output current i out (ma) v in =5.0v output current 100ma 400ma 3.30 3.25 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 3.35 time t ( s) output current i out (ma) v in =5.0v output current 400ma 100ma rp500x152a/154a rp500x152a/154a 1.50 1.45 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 1.55 1.40 time t ( s) output current i out (ma) v in =3.6v output current 0ma 200ma 1.55 1.50 0 1000 200 600 800 400 output voltage v out (v) output voltage 0 200 1.60 1.45 time t ( s) output current i out (ma) v in =3.6v output current 200ma 0ma rp500x15xa rp500x15xa 1.50 1.45 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 1.55 time t ( s) output current i out (ma) v in =3.6v output current 100ma 400ma 1.50 1.45 0 100 20 60 80 40 output voltage v out (v) output voltage 0 200 400 1.55 time t ( s) output current i out (ma) v in =3.6v output current 400ma 100ma
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