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mic5301 single, 150ma cap uldo? uldo is a trademark of micrel, inc. mlf and micro leadframe are registered trademarks of amkor technology, inc. micrel inc. 2180 fortune drive san jose, ca 95131 usa te l +1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micre l.com april 2008 m9999-042108 general description the mic5301 is a high performance, single output ultra low ldo (uldo?) regu lator, offering low total output noise. the mic5301 is capable of sourcing 150ma output current and offers high psrr and low output noise, making it an ideal solution for rf applications. for battery operated applications, the mic5301 offers 2% accuracy, extremely low dropout voltage (40mv @ 150ma), and low ground current (typically 85a total). the mic5301 can also be put into a zero-off-mode current state, drawing no current when disabled. the mic5301 is available in the 1.6mm x 1.6mm thin mlf ? package, occupying only 2.56mm 2 of pcb area, a 36% reduction in board area compared to sc-70 and 2mm x 2mm mlf ? packages. the mic5301 has an operating junction temperature range of C40c to +125c and is available in fixed and adjustable output voltages in lead-free (rohs compliant) thin mlf ? and thin sot-23-5 packages. data sheets and support documentation can be found on micrels web site at www.micrel.com. features ? ultra low dropout voltage C 40mv @ 150ma ? input voltage range: 2.3v to 5.5v ? 150ma guaranteed output current ? stable with ceramic output capacitors ? ultra low output noise C 30vrms ? low quiescent current C 85a total ? high psrr C up to 75db@1khz ? 35s turn-on time ? high output accuracy ? 2% initial accuracy ? 3% over temperature ? thermal shutdown and current limit protection ? tiny 6-pin 1.6mm x 1.6mm thin mlf ? leadless package ? thin sot-23-5 package ? applications ? mobile phones ? pdas ? gps receivers ? portable electronics ? digital still an d video cameras ? typical application vout vinen gnd v in 1f 1f mic5301-x.xymt byp 0.01f portable application downloaded from: http:///
micrel, inc. mic5301 april 2008 2 m9999-042108 ordering information part number marking code (1) output voltage (2) temperature range package mic5301-2.85yml (4) 2jc 2.85v C40c to +125c 6-pin 1.6mm x 1.6mm mlf ? mic5301yml (4) caa adj. C40c to +125c 6-pin 1.6mm x 1.6mm mlf ? mic5301-1.3ymt (3,4) 13c 1.3v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-1.5ymt (3,4) 15c 1.5v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-1.8ymt (3,4) 18c 1.8v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-2.1ymt (3,4) 21c 2.1v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-2.5ymt (3,4) 25c 2.5v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-2.6ymt (3,4) 26c 2.6v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-2.8ymt (3,4) 28c 2.8v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-2.85ymt (3,4) 2jc 2.85v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-2.9ymt (3,4) 29c 2.9v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-3.0ymt (3,4) 30c 3.0v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-3.3ymt (3,4) 33c 3.3v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-4.6ymt (3,4) 46c 4.6v C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301ymt (3,4) caa adj. C40c to +125c 6-pin 1.6mm x 1.6mm thin mlf ? mic5301-1.3yd5 qc 13 1.3v C40c to +125c 5-pin tsot-23 mic5301-1.5yd5 qc 15 1.5v C40c to +125c 5-pin tsot-23 mic5301-1.8yd5 qc 18 1.8v C40c to +125c 5-pin tsot-23 mic5301-2.1yd5 qc 21 2.1v C40c to +125c 5-pin tsot-23 mic5301-2.5yd5 qc 25 2.5v C40c to +125c 5-pin tsot-23 mic5301-2.6yd5 qc 26 2.6v C40c to +125c 5-pin tsot-23 mic5301-2.8yd5 qc 28 2.8v C40c to +125c 5-pin tsot-23 mic5301-2.85yd5 qc 2j 2.85v C40c to +125c 5-pin tsot-23 mic5301-2.9yd5 qc 29 2.9v C40c to +125c 5-pin tsot-23 mic5301-3.0yd5 qc 30 3.0v C40c to +125c 5-pin tsot-23 mic5301-3.3yd5 qc 33 3.3v C40c to +125c 5-pin tsot-23 mic5301-4.6yd5 qc 46 4.6v C40c to +125c 5-pin tsot-23 mic5301yd5 qc aa adj. C40c to +125c 5-pin tsot-23 notes: 1. under bar / over bar symbol may not be to scale. 2. other voltages available. contact micrel for details. 3 . t h i n m l f ? pin 1 indicator = . 4 . m l f ? thin mlf ? are green rohs compliant packages. lead finish is nipdau. mold compound is halogen free. downloaded from: http:///
micrel, inc. mic5301 april 2008 3 m9999-042108 pin configuration 1 en gnd vin 6 byp ncout 54 23 1 en gnd vin 6 byp adjout 54 23 6-pin 1.6mm x 1.6mm thin mlf ? (mt) fixed (top view) 6-pin 1.6mm x 1.6mm thin mlf ? (mt) adjustable (top view) en gnd byp out vin 3 15 2 4 en gnd adj out vin 3 15 2 4 tsot-23-5 (d5) fixed (top view) tsot-23-5 (d5) adjustable (top view) pin description pin no. thin mlf-6 fixed pin no. thin mlf-6 adj. pin no. tsot-23-5 fixed pin no. tsot-23-5 adj. pin name pin function 1 1 3 3 en enable input. active high. high = on, low = off. do not leave floating. 2 2 2 2 gnd ground 3 3 1 1 vin supply input. 4 4 5 5 out output voltage. 5 C C C nc no connection. C 5 C 4 adj adjust input. connect to external resistor voltage divider network. 6 6 4 C byp reference bypass: connect external 0.01 f to gnd for reduced output noise. may be left open. hs pad hs pad C C e pad exposed heatsink pad connected to ground internally. downloaded from: http:///
micrel, inc. mic5301 april 2008 4 m9999-042108 absolute maximum ratings (1) supply voltage (v in ) .....................................0v to +6v enable input voltage (v en )...........................0v to +6v power dissipation, internally limited (3) lead temperature (solde ring, 3sec ) ..................260c storage temperature (t s ) ................ C65c to +150c operating ratings (2) supply voltage (v in ) .............................. +2.3v to +5.5v enable input voltage (v en ).............................. 0v to v in junction temperature (t j ) ................. C40c to +125c junction thermal resistance mlf-6 ( ja ).............................................. 100 c/w thin mlf-6 ( ja )...................................... 100 c/w tsot-23-5 ( ja ) ...................................... 235 c/w electrical characteristics (4) v in = v out + 1.0v; c out = 1.0f; i out = 100a; t j = 25c, bold values indicate C40c to +125c, unless noted. parameter conditions min typ max units variation from nominal v out -2.0 +2.0 % output voltage accuracy variation from nominal v out ; C40c to +125c -3.0 +3.0 % line regulation v in = v out + 1v to 5.5v; i out = 100a 0.02 0.3 0.6 %/v %/v load regulation i out = 100a to 150ma 0.15 2.0 % dropout voltage (5) i out = 100a i out = 100ma i out = 150ma 0.1 25 40 75 100 mv mv mv ground pin current i out = 0 to 150ma 85 120 a ground pin current in shutdown v en 0.2v 0.01 2 a ripple rejection f = 1khz; c out = 1.0f; c byp = 0.1f f = 20khz; c out = 1.0f; c byp = 0.1f 75 50 db db current limit v out = 0v 275 450 850 ma output voltage noise c out = 1.0f; c byp = 0.1f; 10hz to 100khz 30 v rms enable input logic low 0.2 v enable input voltage logic high 1 v v il 0.2v 0.01 1 a enable input current v ih 1.0v 0.01 1 a turn-on time turn-on time c out = 1.0f; c byp = 0.1f 35 100 s notes : 1. exceeding the absolute maximum rating may damage the device. 2. the device is not guaranteed to function outside its operating rating. 3. the maximum allowable power dissipation of any t a (ambient temperature) is p d(max) = (t j(max) C t a ) / ja . exceeding the maximum allowable power dissipation will result in excessive die te mperature, and the regulator will go into thermal shutdown. 4. specification for packaged product only. 5. dropout voltage is defined as the input-to-output differentia l at which the output voltage drops 2% below its nominal value measured at 1v differential. downloaded from: http:///
micrel, inc. mic5301 april 2008 5 m9999-042108 functional diagram vin en byp vout gnd current limit ldo quick- start v ref thermal shutdown erroramp mic5301 block diagram C fixed vin en byp vout gnd current limit ldo quick- start v ref thermal shutdown erroramp adj mic5301 block diagram C adjustable downloaded from: http:///
micrel, inc. mic5301 april 2008 6 m9999-042108 typical characteristics 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 power supply rejection ratio 10 frequency (khz) 1 0.1 100 1,000 100a 50ma 150ma v in = 3.85v v out = 2.85v c out = 1f c byp = 0.1f 40 45 50 55 60 dropout voltage vs. temperature temperature (c) v in = v out + 1v v out = 2.8v c out = 1f 150ma 100ma 50ma 25ma 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 40 45 50 0 25 50 75 100 125 150 output current (ma) dropout voltage vs. output current v in = v out + 1v v out = 2.85v c out = 1f 2.82 2.83 2.84 2.85 2.86 2.87 2.88 0 25 50 75 100 125 150 output current (ma) output voltage vs. output current v in = v out + 1v v out = 2.85v c out = 1f 0 0.5 1.0 1.5 2.0 2.5 3.0 0123456 supply voltage (v) output voltage vs. supply voltage 100a 150ma v out = 2.85v 2.25 2.45 2.65 3.05 3.25 3.45 temperature (c) output voltage vs. temperature 2.85 v in = v out + 1v v out = 2.85v c out = 1f i out = 100a 0 10 20 30 40 50 60 70 80 90 100 0 25 50 75 100 125 150 output current (ma) ground current vs. output current v in = v out + 1v v out = 2.85v c out = 1f 70 72 74 80 82 84 86 88 90 ground current temperature (c) vs. temperature v in = v out + 1v v out = 2.85v c out = 1f 150ma 100a 76 78 0 10 20 30 40 50 60 70 80 90 100 3.0 3.5 4.0 4.5 5.0 5.5 supply voltage (v) ground current vs. supply voltage 100a 150ma 410 420 430 440 450 460 470 480 490 500 510 3.0 3.5 4.0 4.5 5.0 5.5 input voltage (v) current limit vs. input voltage v en = v in c out = 1f 0.001 0.01 0.1 1 10 output noise spectral density 10 frequency (khz) 1 0.01 100 10,000 0.1 1,000 v in = 4v v out = 2.85v c out = 1f c byp = 0.1f downloaded from: http:///
micrel, inc. mic5301 april 2008 7 m9999-042108 functional characteristics enable turn-on enable (0.5v/div) output volta g e (1v/div) time (10s/div) v in = v out + 1v v out = 2.85v c out = 1f c byp = 0.1f load transient output volta g e (20mv/div) output current (50ma/div) time (40s/div) v in = v out + 1v v out = 2.85v c out = 1f 150ma 10ma line transient input volta g e (2v/div) output volta g e (50mv/div) time (40s/div) 5v 4v v in = v out + 1v v out = 2.85v c out = 1f c byp = 0.1f i out = 10ma downloaded from: http:///
micrel, inc. mic5301 april 2008 8 m9999-042108 applications information enable/shutdown the mic5301 comes with an active-high enable pin that allows the regulator to be disabled. forcing the enable pin low disables the regulator and sends it into a zero off-mode-current stat e. in this state, current consumed by the regulator goes nearly to zero. forcing the enable pin high enables the output voltage. the active-high enable pin uses cmos technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. input capacitor the mic5301 is a high-performance, high bandwidth device. therefore, it requ ires a well-bypassed input supply for optimal performance. a 1f capacitor is required from the input to ground to provide stability. low-esr ceramic capacitors provide optimal performance at a minimum of space. additional high- frequency capacitors, such as small-valued npo dielectric-type capacitors, help filter out high- frequency noise and are good practice in any rf- based circuit. output capacitor the mic5301 requires an out put capacitor of 1f or greater to maintain stability. the design is optimized for use with low-esr ceramic chip capacitors. high esr capacitors may cause high frequency oscillation. the output capacitor can be increased, but performance has been optimized for a 1f ceramic output capacitor and does not improve significantly with larger capacitance. x7r/x5r dielectric-type ceramic capacitors are recommended because of their temperature performance. x7r-type capacitors change capacitance by 15% over t heir operating temperature range and are the most stable type of ceramic capacitors. z5u and y5v dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. to use a ceramic chip capacitor with y5v dielectric, the value must be much higher than an x7r ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. bypass capacitor a capacitor can be placed from the noise bypass pin to ground to reduce output voltage noise. the capacitor bypasses the inte rnal reference. a 0.1 f capacitor is recommended for applications that require low-noise outputs. the bypass capacitor can be increased, further reducing noise and improving psrr. turn-on time increases slightly with respect to bypass capacitance. a unique, quick-start circuit allows the mic5301 to drive a large capacitor on the bypass pin without significantly slowing turn-on time. refer to the typical characteristics section for performance with different bypass capacitors. no-load stability unlike many other voltage regulators, the mic5301 will remain stable and in regul ation with no load. this is especially important in cmos ram keep-alive applications. adjustable regulator application adjustable regulators use the ratio of two resistors to multiply the reference voltage to produce the desired output voltage. the mic5301 can be adjusted from 1.25v to 5.5v by using two external resistors (figure 1). the resistors set the output voltage based on the following equation: ? ? ? ? ? ? + = r2 r1 1 v v ref out v ref = 1.25v mic5301ymt vout vin adj en gnd v in v out r1 1f r2 1f figure 1. adjustable voltage output thermal considerations the mic5301 is designed to provide 150ma of continuous current. maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. given that the input voltage is 5.0v, the output voltage is 2.8v and the output current = 150ma. the actual power dissipati on of the regulator circuit can be determined using the equation: p d = (v in C v out ) i out + v in i gnd because this device is cmos and the ground current is typically <100a over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. p d = (5v C 2.8v) 150ma p d = 0.33w downloaded from: http:///
micrel, inc. mic5301 april 2008 9 m9999-042108 to determine the maximum ambient operating temperature of the package, use the junction-to- ambient thermal resistance of the device and the following basic equation: p d(max) = t j(max) - t a ja ? ? t j(max) = 125c, the maximum junction temperature of the die ja thermal resistance = 100c/w. the table below shows junc tion-to-ambient thermal resistance for the mic5301 in the 6-pin 1.6mm x 1.6mm mlf ? package. package ja recommended minimum footprint 6-pin 1.6x1.6 mlf ? 100c/w 6-pin 1.6x1.6 thin mlf ? 100c/w thermal resistance substituting p d for p d(max) and solving for the ambient operating temper ature will give the maximum operating conditions for the regulator circuit. the junction-to-ambient thermal resistance for the minimum footprint is 100c/w. the maximum power dissipation must not be exceeded for proper operation. for example, when operati ng the mic5301-2.8yml at an input voltage of 5v and 150ma load with a minimum footprint layout, the maximum ambient operating temperature t a can be determined as follows: 0.33w = (125c C t a )/(100c/w) t a =92c therefore, a 2.8v applicat ion with 150ma of output current can accept an ambi ent operating temperature of 92c in a 1.6mm x 1.6mm mlf ? package. for a full discussion of heat sinking and thermal effects on voltage regulators, refer to the regulator thermals section of micrels designing with low-dropout voltage regulators handbook. this information can be found on micrel's website at: http://www.micrel.com/_pdf/other/ldobk_ds.pdf downloaded from: http:///
micrel, inc. mic5301 april 2008 10 m9999-042108 package information 6-pin 1.6mm x 1.6mm mlf ? (ml) 6-pin 1.6mm x 1.6mm thin mlf ? (mt) downloaded from: http:///
micrel, inc. mic5301 april 2008 11 m9999-042108 5-pin tsot-23 (d5) micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http:/www.micrel.com the information furnished by micrel in this data sheet is belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specificati ons at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. li fe support devices or systems are devices or systems that (a ) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to resul t in a significant injury to the user. a purchasers use or sale of micrel products for use in life s upport appliances, devices or systems is a pu rchasers own risk and purchaser agrees to fully indemnify micrel fo r any damages resulting from such use or sale. ? 2006 micrel, inc. downloaded from: http:///

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