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mic69301/2/3 single supply v in , low v in , low v out , 3a ldo mlf and micro leadframe are registered trademarks of amkor technologies, 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 general description the mic69301/2/3 is the 3a output current member of the mic69xxx family of high current, low voltage regulators, which support currents of 1a, 1.5a, 3a, and 5a. this family operates from a single low voltage supply, yet offers high precision and ultra low dropout of 500mv under worst case conditions. the mic69301/2/3 operates from an input voltage of 1.65v to 5.5v. it is designed to drive digital circuits requiring low voltage at high currents (i.e., pl ds, dsp, microcontroller, etc.). these regulators are available in adjustable and fixed output voltages. the adjustable version can support output voltages down to 0.5v. the cap design of the mic69301/2/3 is optimized for stability with low value, low-esr ceramic output capacitors. features of the mic69301/2/3 include thermal shutdown and current limit protection. logic enable and error flag pins are also available. the mic69301/2/3 is offer ed in to-263, s-pak and the epad soic-8 packages. the mic 69303 is also available in a 12-pin 4mm x 4mm mlf tm package. all packages have an operating temperature range of ?40c to +125c. datasheets and support documentation can be found on micrel?s web site at: www.micrel.com . features ? input voltage range: v in : 1.65v to 5.5v ? maximum dropout (v in ? v out ) of 500mv over temperature ? adjustable output voltage down to 0.5v ? stable with 10f ceramic output capacitor ? excellent line and load regulation ? logic controlled shutdown ? thermal shutdown and current-limit protection ? error flag output ? 5-pin to-263 ? 5-pin s-pak package ? epad soic-8 package ? 12-pin 4mm x 4mm mlf tm package (mic69303 only) ? ?40c to +125c junction temperature range applications ? point-of-load applications ? industrial power ? sensitive rf applications ___________________________________________________________________________________________________________ typical application *error flag output mic69303 only fixed 1.2v regulator w/error flag output adjustable regulator march 2011 m9999-032111-b
micrel, inc. mic69301/2/3 march 2011 2 m9999-032111-f ordering information part number nominal output voltage flag output junction temperature range package lead finish mic69301-1.2yme 1.2v yes ?40 to +125c 8-pin epad soic pb free mic69301-1.2wr 1.2v yes ?40 to +125c 5-pin s-pak rohs compliant mic69301-1.2wu 1.2v yes ?40 to +125c 5-pin to-263 rohs compliant mic69302wr adj. no ?40 to +125c 5-pin s-pak rohs compliant mic69302wu adj. no ?40 to +125c 5-pin to-263 rohs compliant mic69303yme adj. yes ?40 to +125c 8-pin epad soic pb free mic69303yml adj. yes ?40 to +125c 12-pin 4mm x 4mm mlf tm pb free pin configuration 5-pin to-263 (u) (adjustable voltage) 5-pin to-263 (u) (fixed voltage with flag) 5-pin s-pak (r) (adjustable voltage) 5-pin s-pak (r) (fixed voltage with flag) 8-pin epad soic (me) (adjustable voltage) 8-pin epad soic (me) (fixed voltage with flag)
micrel, inc. mic69301/2/3 march 2011 3 m9999-032111-f 12-pin 4mm x 4mm mlf tm (ml) (adjustable voltage with flag) pin description pin number (fixed) spak-5 to-263-5 pin number (adjustable) spak-5 to-263-5 pin number (fixed) epad soic-8 pin number (adjustable) epad soic-8 pin number (adjustable) epad 4mm x 4mm mlf tm pin name pin function 1 1 2 2 3 en enable (input): cmos compatible input. logic high = enable, logic low = shutdown. do not leave pin floating. 2 2 3,4 3,4 4, 5, 6 in input voltage which supplies current to the output power device. 3, tab 3, tab 1 1 1 gnd ground (tab is connected to ground on s-pak and to-263). 4 4 5,6 5,6 7, 9 out regulator output. ? ? 7 ? ? sns output voltage sens e. connect to output voltage. ? 5 ? 7 11 adj adjustable regulator feedback input. connect to resistor voltage divider. 5 ? 8 8 12 flg error flag (output): open collector output. active low indicates an output fault condition. ? ? ep ep ep ep exposed pad. connect to gnd. ? ? ? ? 2, 8, 10 nc no connect. not internally connected.
micrel, inc. mic69301/2/3 march 2011 4 m9999-032111-f absolute maximum ratings (1) supply input voltage (v in to gnd) .................. ?0.3v to +6v logic input voltage (v en to gnd). .......?0.3v to (v in + 0.3v) fault flag(v flg to gnd ..................................... ?0.3v to 6v storage temperature (t s ).........................?65c to +125c lead temperature(t s ) .............................................. 260c esd (4) ............................................................................. 2kv operating ratings (2) supply voltage (v in )....................................... 1.65v to 5.5v enable input voltage (v en )..................................... 0v to v in junction temperature (t j ) ..................?40c t j +125c power dissipation (p d )........................... internally limited (3) package thermal resistance s-pak-5 ( t jc ).......................................................2 c/w s-pak-5 ( t ja ).....................................................38c/w to-263-5 ( t jc ) .....................................................2 c/w epad soic-8 ( t ja ) .............................................41c/w 4x4 mlf-12l( ja ) .............................................60 c/w electrical characteristics (4) t a = 25c with v in = v out + 1v; bold values indicate ?40c< t j < +125c; i out = 10ma; c out = 10f ceramic, unless noted. parameter test conditions min typ max unit power input supply input voltage range (v in ) 1.65 5.5 v i out = 10ma 1.2 5 ma i out = 1.5a 12 30 ma ground pin current i out = 3.0a 32 75 ma ground pin current in shutdown v en = 0v; v in = 2.0v; v out = 0v 1 a output voltage output voltage (fixed) -2.0 2.0 % load regulation i out = 10ma to 3a 0.3 % line regulation (5) v in = v out + 1.0v to 5.5v 0.2 0.3 %/v reference (adjustable) feedback reference voltage (adj pin) (+/- 2.0%) 0.490 0.5 0.510 v feedback bias current v adj = 0.5v 0.25 1.0 a current limit current limit v out = 0v 3.3 5.2 a power dropout voltage i out = 1.5a 200 300 mv dropout voltage (v in - v out ) (6) i out = 3.0a 275 500 mv enable input regulator enabled 0.8 0.57 v enable input threshold regulator shutdown 0.2 v v en 0.2v ( regulator shutdown) 0.0 a enable pin bias current v en 0.8v ( regulator enabled) 7.0 a turn-on time 90% of typical v out ; v en = v in 10 150 s fault output fault threshold voltage % of v out below nominal output (v out falling) 7.5 10 14 % fault hysteresis 2.0 % fault output low voltage i flg = 250 a (sinking), v en = 0v 150 mv
micrel, inc. mic69301/2/3 march 2011 5 m9999-032111-f electrical characteristics (4) (continued) t a = 25c with v in = v out + 1v; bold values indicate ?40c< t j < +125c; i out = 10ma; c out = 10f ceramic, unless noted. fault leakage current v flg = 5.0v; v en = 0v 0.05 a thermal protection over-temperature shutdown t j rising 165 c over-temperature shutdown hysteresis 10 c 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) ? t a ) / t ja . exceeding the maximum allowable power dissipation will result in excessive die tem perature and the regulator will go into thermal shutdown. 4. specification for packaged product only. 5. minimum input for line regulation test is set to v out + 1v relative to the highest output voltage. 6. 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. for outputs below 1.65v, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65v. minimum input operating voltage is 1.65v.
micrel, inc. mic69301/2/3 march 2011 6 m9999-032111-f typical characteristics 0 10 20 30 40 50 60 70 power supply rejection ratio 1k 10k frequency (hz) v in = 3.3v v out = 1.8v i out = 0.5a 0 50 100 150 200 250 300 0 0.5 1.0 1.5 2.0 2.5 3.0 output current (a) dropout voltage vs. output current v out = 1.2v c out = 10f 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 0.5 1.0 1.5 2.0 2.5 input voltage (v) dropout voltage vs. input voltage v out = 1.2v c out = 10f 500ma 1.5a 3a 0 50 100 150 200 250 300 350 400 dropout voltage vs. temperature 20 40 60 80 temperature (c) v out = 1.2v c out = 10f i out = 1.5a i out = 3a 0 5 10 15 20 25 30 35 0 0.5 1.0 1.5 2.0 2.5 3 output current (a) ground current vs. output current v in = 2.2v v out = 1.2v c out = 10f 0 5 10 15 20 25 30 35 40 45 50 ground current vs. temperature 20 40 60 80 temperature (c) v in = 2.2v v out = 1.2v c out = 10f i out = 1.5a i out = 3a 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 output voltage vs. temperature 20 40 60 80 temperature (c) v in = 2.2v v out = 1.2v i out = 10ma c out = 10f 0 1 2 3 4 5 6 7 current limit vs. temperature 20 40 60 80 temperature (c) v in = 2.2v v out = 1.2v c out = 10f 1.100 1.125 1.150 1.175 1.200 1.225 1.250 1.275 1.300 0 0.5 1.0 1.5 2.0 2.5 3.0 output current (a) load regulation v in = 2.2v v out = 1.2v c out = 10f 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 enable threshold vs. temperature 20 40 60 80 temperature (c) on off v in = 2.2v v out = 1.2v i out = 100ma c out = 10f
micrel, inc. mic69301/2/3 march 2011 7 m9999-032111-f functional characteristics
micrel, inc. mic69301/2/3 march 2011 8 m9999-032111-f functional diagram fixed output regulator enable in en out adj v ref 0.5v gnd adjustable output regulator
micrel, inc. mic69301/2/3 march 2011 9 m9999-032111-f application information the mic69301/2/3 is an ultra-high performance low dropout linear regulator designed for high current applications requiring a fast transient response. it utilizes a single input supply and has a very low dropout voltage perfect for low-voltage dc -to-dc conversion. the mic69301/2/3 requires a minimum number of external components. the mic69301/2/3 regulator is fully protected from damage due to fault conditions offering constant current limiting and thermal shutdown. input supply voltage v in provides a high current to the collector of the pass transistor. the minimum input voltage is 1.65v allowing conversion from low voltage supplies. output capacitor the mic69301/2/3 requires a minimum of output capacitance to maintain stability. however, proper capacitor selection is important to ensure desired transient response. the mic69301/2/3 is specifically designed to be stable with low esr ceramic chip capacitors. a 10f ceramic chip capacitor should satisfy most applications. output capacitance can be increased without bound. see typical ch aracteristics for examples of load transient response. x7r dielectric ceramic capacitors are recommended because of their temperatur e performance. x7r-type capacitors change capacitance by only 15% over their 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 or a tantalum capacitor to ensure the same capacitance value over the operating temperature range. tantalum capacitors have a very stable dielectric (10% over their operating temperature range) and can also be used with this device. input capacitor an input capacitor of 1f or greater is recommended when the device is more than 4 inches away from the bulk supply capacitance or when the supply is a battery. small, surface mount, ceramic chip capacitors can be used for the bypassing. the capacitor should be placed within 1 inch of the device for optimal performance. larger values will help to improve ripple rejection by bypassing the input to the r egulator further improving the integrity of the output voltage. minimum load current the mic69301/2/3 regulator is specified between finite loads. if the output current is too small, leakage currents dominate and the output voltage rises. a 10ma minimum load current is necessary for proper operation. adjustable regulator design the mic69302 and mic69303 adjustable version allows programming the output vo ltage anywhere between 0.5v and 5.0v with two resistors. the resistor value between v out and the adjust pin should not exceed 10k ? . larger values can cause instability. the resistor values are calculated by: ? ? 1 ? u 1 r r 0.5v 2 1 out where v out is the desired output voltage. enable the fixed output voltage versions of the mic69301 feature an active high enable input (en) that allows on- off control of the regulator. current drain reduces to near ?zero? when the device is shutdown, with only microamperes of leakage current. en may be directly tied to v in and pulled up to the maximum supply voltage. thermal design linear regulators are simple to use. the most complicated design parameters to consider are thermal characteristics. thermal design requires the following application-specific parameters: x maximum ambient temperature (t a ) x output current (i out ) x output voltage (v out ) x input voltage (v in ) x ground current (i gnd ) first, calculate the power dissipation of the regulator from these numbers and the device parameters from this data sheet. p d = (v in ? v out ) x i out + v in x i gnd where the ground current is approximated by using numbers from the ?electrical characteristics? or ?typical characteristics? sections. the heat sink thermal resistance is then determined with this formula: t sa = ((t j (max) ? t a )/ p d ) ? ( t jc + t cs ) where t j (max) 125 c and t cs is between 0 c and 2 c/w.
micrel, inc. mic69301/2/3 march 2011 10 m9999-032111-f the heat sink may be significantly reduced in applications where the minimum input voltage is known and is large compared with the dropout voltage. use a series input resistor to drop excessive voltage and distribute the heat between this resistor and the regulator. the low dropout properties of micrel super eta pnp ? regulators allow significant reductions in regulator power dissipation and the associated heat sink without compromising performance. when this technique is employed, a capacitor of at least 1.0f is needed directly between the input and regulator ground. refer to ?application note 9? for further details and examples on thermal design and heat sink applications.
micrel, inc. mic69301/2/3 march 2011 11 m9999-032111-f package information 5-pin s-pak (r) 5-pin to-263 (u)
micrel, inc. mic69301/2/3 march 2011 12 m9999-032111-f 8-pin epad soic (me) 12-pin epad mlf 4x4 (ml)
micrel, inc. mic69301/2/3 march 2011 13 m9999-032111-f 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 micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether express, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrel?s terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authorized for use as components in life suppor t appliances, devices or systems where malfu nction of a product reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended for surgical impla 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 re sulting from such use or sale. can nt ? 2010 micrel, incorporated.

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