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mic5210 dual 150ma ldo regulator mm8 and micrel mini 8 are trademarks of micrel, inc. micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com september 2006 1 m9999-090806 general description the mic5210 is a dual linear vo ltage regulator with very low dropout voltage (typically 10mv at light loads and 140mv at 100ma), very low ground current (225a at 10ma output), and better than 1% initial accuracy. it also features individual logic-compatible enable/shutdown control inputs. both regulator outputs can supply up to 150ma at the same time as long as each regulator?s maximum junction temperature is not exceeded. key features include an undervoltage monitor with an error flag output, a reference bypass pin to improve its already low-noise performance (8-pin versions only), reversed- battery protection, current lim iting, and overtemperature shutdown. designed especially for hand-held battery powered devices, the mic5210 can be sw itched by a cmos or ttl compatible logic signal, or the enable pin can be connected to the supply input for 3-terminal operation. when disabled, power consumption drops nearly to zero. dropout ground current is minimi zed to prolong battery life. key features include current limiting, overtemperature shutdown, and protection against reversed battery. the mic5210 is available in 2.7v, 2.8v, 3.0v, 3.3v, 3.6v, 4.0v and 5.0v fixed voltage configurations. other voltages are available; contact micrel for details. data sheets and support doc umentation can be found on micrel?s web site at www.micrel.com. features ? micrel mini 8? msop package ? up to 150ma per regulator output ? low quiescent current ? low dropout voltage ? wide selection of output voltages ? tight load and line regulation ? low temperature coefficient ? current and thermal limiting ? reversed input polarity protection ? zero off-mode current ? logic-controlled electronic enable applications ? cellular telephones ? laptop, notebook, and palmtop computers ? battery-powered equipment ? bar code scanners ? smps post-regulator/dc-to-dc modules ? high-efficiency linear power supplies typical application low-noise + ultralow-noise (dual) regulator
micrel, inc. mic5210 september 2006 2 m9999-090806 ordering information part number standard marking pb-free marking voltage* side a/b accuracy junction temp. range package mic5210-2.7bmm contact factory 2.7v /2.7v 1.0% ?40 to +125c 8-pin msop mic5210-2.8bmm mic5210-2.8ymm 2.8v/2 .8v 1.0% ?40 to +125c 8-pin msop mic5210-2.9bmm contact factory 2.9v /2.9v 1.0% ?40 to +125c 8-pin msop mic5210-3.0bmm mic5210-3.0ymm 3.0v/3 .0v 1.0% ?40 to +125c 8-pin msop mic5210-3.3bmm mic5210-3.3ymm 3.3v/3 .3v 1.0% ?40 to +125c 8-pin msop mic5210-3.6bmm contact factory 3.6v /3.6v 1.0% ?40 to +125c 8-pin msop mic5210-4.0bmm contact factory 4.0v /4.0v 1.0% ?40 to +125c 8-pin msop mic5210-5.0bmm mic5210-5.0ymm 5.0v/5 .0v 1.0% ?40 to +125c 8-pin msop mic5210-2.8/3.0bmm mp mic5210-mpymm** mpy 2.8v/3.0v 1.0% ?40 to +125c 8-pin msop * other voltages available. contact micrel for details. ** order entry p/n for pb-free has been abbreviated in compliance with micrel systems. mic5210-mpymm = full p/n: mic5210-2.8/ 3.0ymm. voltage code key 2.8 m 3.0 p
micrel, inc. mic5210 september 2006 3 m9999-090806 pin configuration mic5210bmm pin description pin number pin name pin function 1 outa regulator output a 2 gnd ground 3 outb regulator output b 4 bypb reference bypass b: connect external 470pf capacitor to gnd to reduce output noise in regulator ?b?. may be left open. 5 enb enable/shutdown b (input): cmos com patible input. logic high = enable, logic low or open = shutdown. do not leave floating. 6 inb supply input b 7 ena enable/shutdown a (input): cmos co mpatible input. logic high = enable, logic low or open = shutdown. do not leave floating. 8 ina supply input a
micrel, inc. mic5210 september 2006 4 m9999-090806 absolute maximum ratings supply input voltage (v in ).............................. ?20v to +20v enable input voltage (v en )............................. ?20v to +20v power dissipation (p d ) ..............................interna lly limited storage temperature rang e ....................?60c to +150c lead temperature (solde ring, 5 se c.) ........................ 260c operating ratings supply input voltage (v in )................................. 2.5v to 16v enable input voltage (v en )................................... 0v to 16v junction temperature (t j ) .......................... ?40c to +85c thermal resistance ( ja ).......................................... note 1 electrical characteristics v in = v out +1v; i l = 100a; c l = 1.0f; v en 2.0v; t j = 25c, bold values indicate ?40c < t j < +125c, unless noted. symbol parameter condition min typ max units v o output voltage accuracy variation from specified v out ?1 ?2 1 2 % % ? v o / ? t output voltage temperature coefficient note 2 40 ppm/c ? v o /v o line regulation v in = v out +1v to 16v 0.004 0.012 0.05 %/v %/v ? v o /v o load regulation i l = 0.1ma to 150ma ( note 3 ) 0.02 0.2 0.5 % % v in ? v o dropout voltage, note 4 i l = 100a i l = 50ma i l = 100ma i l = 150ma 10 110 140 165 50 70 150 230 250 300 275 350 mv mv mv mv mv mv mv mv i gnd quiescent current v en 0.4v (shutdown) v en 0.18v (shutdown) 0.01 1 5 a a i gnd ground pin current, note 5 (per regulator) v en 2.0v, i l = 100a i l = 50ma i l = 100ma i l = 150ma 80 350 600 1300 125 150 600 800 1000 1500 1900 2500 a a a a a a a a psrr ripple rejection frequency = 100hz, i l = 100a 75 db i limit current limit v out = 0v 320 500 ma ? v o / ? p d thermal regulation note 6 0.05 %/w e no output noise (regulator b only) i l = 50ma, c l = 2.2f, 470pf from bypb to gnd 260 nv/ hz
micrel, inc. mic5210 september 2006 5 m9999-090806 symbol parameter condition min typ max units enable input v il enable input logic-low voltage regulator shutdown 0.4 0.18 v v v ih enable input logic-high voltage regulator enabled 2.0 v i il i ih enable input current v il 0.4v v il 0.18v v ih 2.0v v ih 2.0v 0.01 5 ?1 ?2 20 25 a a a a notes: 1. absolute maximum ratings indicate limits beyond which damage to the component may occur. electrical specifications do not apply when operating the device outside of its operating ratings. the maximum a llowable power dissipation is a f unction of the maximum junctio n temperature, t j(max) , the junction-to-ambient thermal resistance, ja , and the ambient temperature, t a . the maximum allowable power dissipation at any ambient temperature is calculated using: p d(max) = (t j(max) ? t a ) / ja . exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. the ja of the 8-pin msop (mm) is 200c/w mounted on a pc board (see ?thermal considerations? section for further details). 2. output voltage temperature coefficient is defined as t he worst case voltage change divided by the total temperature range. 3. regulation is measured at constant j unction temperature using low duty cycle puls e testing. parts are tested for load regu lation in the load range from 0.1ma to 150ma. changes in output voltage due to heat ing effects are covered by the thermal regulation specification . 4. 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. 5. ground pin current is the regulator qui escent current plus pass transistor base cu rrent. the total current drawn from the supply is the sum of the load current plus the ground pin current. 6. thermal regulation is defined as the change in output volt age at a time ?t? after a change in power dissipation is applied, excluding load or line regulation effects. specific ations are for a 150ma load pulse at v in = 16v for t = 10ms.
micrel, inc. mic5210 september 2006 6 m9999-090806 typical characteristics -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power suppl y rejection ratio i out = 100a c out = 1f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power suppl y rejection ratio i out = 1ma c out = 1f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power suppl y rejection ratio i out = 10ma c out = 1f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power supply rejection ratio i out = 100ma c out = 1f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power supply rejection ratio i out = 100a c out = 2.2f c byp = 0.01f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power supply rejection ratio i out = 1ma c out = 2.2f c byp = 0.01f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power supply rejection ratio i out = 10ma c out = 2.2f c byp = 0.01f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m 10 100 1000 10000 10 100 1000 10000 ( e m i t) s capacitance (pf) turn-on time vs. bypass capacitance 0 10 20 30 40 50 60 0 0.1 0.2 0.3 0.4 ) b d ( n o i t c e j e r e l p p i r voltage drop (v) power supply ripple rejectio vs. voltage drop i out = 100ma 10ma 1ma c out = 1f 0 10 20 30 40 50 60 70 80 90 100 0 0.1 0.2 0.3 0.4 ) b d ( n o i t c e j e r e l p p i r voltage drop (v) power supply ripple rejection vs. voltage drop i out = 100ma 10ma 1ma c out = 2.2f c byp = 0.01f -100 -80 -60 -40 -20 0 1e+1 1e+21e+3 1e+41e+5 1e+61e+7 ) b d ( r r s p frequency (hz) power supply rejection ratio i out = 100ma c out = 2.2f c byp = 0.01f v in = 6v v out = 5v 10 100 1k 10k 100k 1m 10m 0.0001 0.001 0.01 0.1 1 10 1e+11e+2 1e+31e+41e+51e+61e+ 7 ( e s i o n/ v ) z h frequency (hz) noise performance 10 100 1k 10k 100k 1m 10m 1ma c out = 1f c byp = 10nf (reg. b only) 10ma, c out = 1f v out = 5v
micrel, inc. mic5210 september 2006 7 m9999-090806 0.0001 0.001 0.01 0.1 1 10 1e+11e+2 1e+31e+4 1e+51e+61e+7 ( e s i o n/ v ) z h frequency (hz) noise performance 10ma 1ma 100ma 10 100 1k 10k 100k 1m 10m v out = 5v c out = 10f electrolytic 0.0001 0.001 0.01 0.1 1 10 1e+11e+2 1e+31e+4 1e+51e+61e+7 ( e s i o n/ v ) z h frequency (hz) noise performance (regulator b) 10ma 1ma 100ma 10 100 1k 10k 100k 1m 10m v out = 5v c out = 22f tantalum c byp = 10nf 0.0001 0.001 0.01 0.1 1 10 1e+11e+2 1e+31e+4 1e+51e+61e+ 7 ( e s i o n/ v ) z h frequency (hz) noise performance (regulator b) 10ma 1ma 100ma 10 100 1k 10k 100k 1m 10m v out = 5v c out = 10f electrolytic c byp = 100pf 0.0001 0.001 0.01 0.1 1 10 1e+11e+2 1e+31e+4 1e+51e+61e+7 ( e s i o n/ v ) z h frequency (hz) noise performance (regulator b) 10ma 1ma 100ma 10 100 1k 10k 100k 1m 10m v out = 5v c out = 10f electrolytic c byp = 1nf 0.0001 0.001 0.01 0.1 1 10 1e+11e+2 1e+31e+4 1e+51e+61e+7 ( e s i o n/ v ) z h frequency (hz) noise performance (regulator b) 10ma 1ma 100ma 10 1k 100 10k 100k 1m 10m v out = 5v c out = 10f electrolytic c byp = 10nf 0 40 80 120 160 200 240 280 320 0 40 80 120 160 ) v m ( e g a t l o v t u o p o r d output current (ma) dropout voltage vs. output current +125c +25c ?40c
micrel, inc. mic5210 september 2006 8 m9999-090806 block diagram
micrel, inc. mic5210 september 2006 9 m9999-090806 application information enable/shutdown forcing en (enable/shutdown ) high (> 2v) enables the regulator. en is compatible with cmos logic gates. if the enable/shutdown feature is not required, connect en to in (supply input). input capacitor a 1f capacitor should be placed from in to gnd if there is more than 10 inches of wire between the input and the ac filter capacitor or if a battery is used as the input. reference bypass capacitor bypb (reference bypass) is c onnected to the internal voltage reference of regulator b. a 470pf capacitor (c byp ) connected from bypb to gnd quiets this reference, providing a signifi cant reduction in output noise. c byp reduces the regulator phase margin; when using c byp , output capacitors of 2.2f or greater are generally required to maintain stability. the start-up speed of the mic5210 is inversely proportional to the size of the reference bypass capacitor. applications requiring a slow ramp-up of output voltage should consid er larger values of c byp . likewise, if rapid turn-on is necessary, consider omitting c byp . if output noise is not a major concern, omit c byp and leave bypb open. output capacitor an output capacitor is required between out and gnd to prevent oscillation. the minimum size of the output capacitor is dependent upon whether a reference bypass capacitor is used. 1.0f minimum is recommended when c byp is not used (see figure 2). 2.2f minimum is recommended when c byp is 470pf (see figure 1). larger values improve the regulator?s transient response. the output capacitor value may be increased without limit. the output capacitor should have an esr (effective series resistance) of about 5 ? or less and a resonant frequency above 1mhz. ultralow-esr capacitors may cause a low-amplitude osc illation and/or underdamped transient response. most tantalum or aluminum electrolytic capacitors are adeq uate; film types will work, but are more expensive. since many aluminum electrolytic capacitors have el ectrolytes that freeze at about ?30c, solid tantalum capacitors are recommended for operation below ?25c. at lower values of output current, less output capacitance is required for output stability. the capacitor can be reduced to 0.47f for current below 10ma or 0.33f for currents below 1ma. no-load stability the mic5210 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. this is especially important in cmos ram keep-alive applications. dual-supply operation when used in dual supply sy stems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. thermal considerations multilayer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity. the mic5210-xxbmm (8-pin msop) has a thermal resistance of 200c/w when mounted on a fr4 board with minimum trace widths and no ground plane. pc board dielectric ja fr4 200 c/w msop thermal characteristics for additional heat sink characteristics, please refer to micrel application hint 17, ?c alculating p.c. board heat sink area for surface mount packages?. thermal evaluation examples for example, at 50c am bient temperature, the maximum package power dissipation is: p d(max) = (125c ? 50c) / 200c/w = 375mw if the intent is to operate the 5v version from a 6v supply at the full 150ma load for both outputs in a 50c maximum ambient temperature, make the following calculation: p d(each regulator) = (v in ? v out ) i out + (v in i gnd ) = (6v ? 5v) 150ma + (6v 2.5ma) = 165mw p d(both regulators) = 2 regulators 165mw = 330mw the actual total power dissipation of 330mw is below the 375mw package maximum, t herefore, the regulator can be used. note that both regulators can not always be used at their maximum current rating. for example, in a 5v input to 3.3v output application at 50 c, if one regulator supplies 150ma, the other regulator is limited to a much lower current. the first regulator dissipates: p d = (5v ? 3.3v) 150 + 2.5ma (5v) p d = 267.5mw
micrel, inc. mic5210 september 2006 10 m9999-090806 then, the load that the rema ining regulator can dissipate must not exceed: 375mw ? 267.5mw = 107.5mw this means, using the same 5v input and 3.3v output voltage, the second regulator is limited to about 60ma. taking advantage of the extr emely low-dropout voltage characteristics of the mic5 210, power dissipation can be reduced by using the lowest possible input voltage to minimize the input-to-output voltage drop.
micrel, inc. mic5210 september 2006 11 m9999-090806 package information 8-pin msop (mm) 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 specifications at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life suppo rt devices or systems are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2003 micrel, incorporated.

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