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mic29150/29300/29500/29750 high - current low - dropout regulators **see thermal design section super eta pnp is a registered trademark 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 december 2012 m9999 - 1220 12 -b general description the mic29150/29300/29500/29750 are high current, high accuracy, low - dropout voltage regulators. using micrel's proprietary super eta pnp ? process with a pnp pass elem ent, these regulators feature 350mv to 425 mv (full load) typical drop out voltages and very low ground current. designed for high current loads, these devices also find applications in lower current, extremely low dropout - critical systems, where their tiny dropout voltage and ground current values are important attributes. t he mic29150/29300/29500/29750 are fully protected against overcurrent faults, reversed input polarity, reversed lead insertion, overtemperature operation, and positive and negative transient voltage spikes. five pin fixed voltage versions feature logic level on/off control and an error flag which signals whenever the output falls out of regulation. flagged states include low input voltage (dropout), output current limit, overtemperature shutdown, and extremely high voltage spikes on the input. on the mic29xx1 and mic29xx2, the enable pin may be tied to vin if it is not required for on/off control. the mic29150/29300/29500 are available in 3 - pin and 5 - pin to - 220 and surface mount to - 263 (d 2 pak) packages. the mic29750 7.5a regulators are available in 3 - pin and 5- pin to - 247 packages. the 1.5a, adjustable output mic29152 is available in a 5 - pin power d - pak (to - 252) package. for applications with input voltage 6v or below, see mic37xx x ldos. data sheets and support documentation can be found on micrels web site at www.micrel.com . features ? high current capability : ? mic29150/29151/29152/29153 .............................. 1.5a ? mic29300/29301/29302/29303 ................................ . 3a ? mic29500/29501/29502/29503 ................................ . 5a ? mic29750/29751/29752 ......................................... 7.5a ? low - dropout voltage ? low ground curre nt ? accurate 1% guaranteed tolerance ? extremely fast transient response ? reverse - battery and load dump protection ? zero - current shutdown mode (5 - pin versions) ? error flag signals output out - of - regulation (5 - pin versions) ? also characterized for smaller loads with industry - leading performance specifications ? fixed voltage and adjustable versions applications ? battery - powered equipment ? high - efficiency green computer systems ? automotive electronics ? high - efficiency linear lower supplies ? high - efficiency lost - regula tor for switching supply _________________________________________________________________________________________________________________________ typical application ** fixed output voltage adjustable output voltage (*see minimum load current section ) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 2 m9999 - 1220 12 -b ordering information part number junction tem perature range (1) voltage current package standard rohs compliant (2) mic29150 - 3.3bt mic29150 - 3.3wt (2) C 40c to +125c 3.3 1.5a 3- pin to - 220 mic29150 - 3.3bu mic29150 - 3.3wu (2) C 40c to +125c 3.3 1.5a 3- pin to - 263 mic29150 - 5.0bt mic29150 - 5.0wt (2) C 40c to +125c 5 1.5a 3- pin to - 220 mic29150 - 5.0bu mic29150 - 5.0wu (2) C 40c to +125c 5 1.5a 3- pin to - 263 mic29150 - 12bt mic29150 - 12wt (2) C 40c to +125c 12 1.5a 3- pin to - 220 mic29150 - 12bu mic29150 - 12wu (2) C 40c to +125c 12 1.5a 3- pin to - 263 mic29151 - 3.3bt mic29151 - 3.3wt (2) C 40c to +125c 3.3 1.5a 5- pin to - 220 mic29151 - 3.3bu mic29151 - 3.3wu (2) C 40c to +125c 3.3 1.5a 5- pin to - 263 mic29151 - 5.0bt mic29151 - 5.0wt (2) C 40c to +125c 5 1.5a 5- pin to - 220 mic29151 - 5.0bu mic29151 - 5.0wu (2) C 40c to +125c 5 1.5a 5- pin to - 263 mic29151 - 12bt mic29151 - 12wt (2) C 40c to +125c 12 1.5a 5- pin to - 220 mic29151 - 12bu mic29151 - 12wu (2) C 40c to +125c 12 1.5a 5- pin to - 263 mic29152bt mic29152wt (2) C 40c to +125c ad justable 1.5a 5- pin to - 220 mic29152bu mic29152wu (2) C 40c to +125c adjustable 1.5a 5- pin to - 263 mic29152wd (2) C 40c to +125c adjustable 1.5a 5- pin to - 252 mic29153bt (3) contact factory C 40c to +125c adjustable 1.5a 5- pin to - 220 mic29153bu (3) co ntact factory C 40c to +125c adjustable 1.5a 5- pin to - 263 mic29300 - 3.3bt mic29300 - 3.3wt (2) C 40c to +125c 3.3 3.0a 3- pin to - 220 mic29300 - 3.3bu mic29300 - 3.3wu (2) C 40c to +125c 3.3 3.0a 3- pin to - 263 mic29300 - 5.0bt mic29300 - 5.0wt (2) C 40c to +125c 5 3.0a 3- pin to - 220 mic29300 - 5.0bu mic29300 - 5.0wu (2) C 40c to +125c 5 3.0a 3- pin to - 263 mic29300 - 12bt mic29300 - 12wt (2) C 40c to +125c 12 3.0a 3- pin to - 220 mic29300 - 12bu mic29300 - 12wu (2) C 40c to +125c 12 3.0a 3- pin to - 263 mic29301 - 3.3bt mic29301 - 3.3wt (2) C 40c to +125c 3.3 3.0a 5- pin to - 220 mic29301 - 3.3bu mic29301 - 3.3wu (2) C 40c to +125c 3.3 3.0a 5- pin to - 263 mic29301 - 5.0bt mic29301 - 5.0wt (2) C 40c to +125c 5 3.0a 5- pin to - 220 mic29301 - 5.0bu mic29301 - 5.0wu (2) C 40c to +125c 5 3.0a 5-pin to - 263 mic29301 - 12bt mic29301 - 12wt (2) C 40c to +125c 12 3.0a 5- pin to - 220 mic29301 - 12bu mic29301 - 12wu (2) C 40c to +125c 12 3.0a 5- pin to - 263 mic29302bt mic29302wt (2) C 40c to +125c adjustable 3.0a 5- pin to - 220 mic29302bu mic29302wu (2) C 40c to +125c adjustable 3.0a 5- pin to - 263 mic29303bt mic29303wt (2) C 40c to +125c adjustable 3.0a 5- pin to - 220 mic29303bu mic29303wu (2) C 40c to +125c adjustable 3.0a 5- pin to - 263 mic29500 - 3.3bt mic29500 - 3.3wt (2) C 40c to +125c 3.3 5.0a 3- pin to - 220 no te s: 1. junction temperature. 2. rohs compliant with high - melting solder exemption. 3. special order; please contact factory for availability. downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 3 m9999 - 1220 12 -b ordering information (continued) part number junction temperature range (1) voltage current package standard rohs compl iant (2) mic29500 - 5.0bt mic29500 - 5.0wt (2) C 40c to +125c 5 5.0a 3- pin to - 220 mic29501 - 3.3bt mic29501 - 3.3wt (2) C 40c to +125c 3.3 5.0a 5- pin to - 220 mic29501 - 3.3bu mic29501 - 3.3wu (2) C 40c to +125c 3.3 5.0a 5- pin to - 263 mic29501 - 5.0bt mic29501 - 5. 0wt (2) C 40c to +125c 5 5.0a 5- pin to - 220 mic29501 - 5.0bu mic29501 - 5.0wu (2) C 40c to +125c 5 5.0a 5- pin to - 263 mic29502bt mic29502wt (2) C 40c to +125c adj. 5.0a 5-pin to - 220 mic29502bu mic29502wu (2) C 40c to +125c adj. 5.0a 5- pin to - 263 mic29503 bt mic29503wt (2) C 40c to +125c adj. 5.0a 5- pin to - 220 mic29503bu mic29503wu (2) C 40c to +125c adj. 5.0a 5- pin to - 263 mic29750 - 3.3bwt (4) contact factory (4) C 40c to +125c 3.3 7.5a 3- pin to - 247 mic29750 - 5.0bwt (4) contact factory (4) C 40c to +125c 5 7.5a 3- pin to - 247 mic29751 - 3.3bwt (4) contact factory (4) C 40c to +125c 3.3 7.5a 5- pin to - 247 mic29751 - 5.0bwt (4) contact factory (4) C 40c to +125c 5 7.5a 5- pin to - 247 mic29752bwt (4) mic29752wwt (2 , 4 ) C 40c to +125c adjustable 7.5a 5- pin to - 247 note: 4. not recommended for design. downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 4 m9999 - 1220 12 -b pin configuration 3- pin to - 220 (t) mic29150/29300/29500 5- pin to - 220 fixed voltage (t) mic29151/29301/29501/29751 5- pin to - 220 adjustable voltage (t) mic29152/29302/29502 5- pin to - 220 adjustabl e with flag (t) mic29153/29303/29503 3- pin to - 247 ( wt ) mic29750 5- pin to - 247 fixed voltage ( wt ) mic29751 downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 5 m9999 - 1220 12 -b pin configuration (continued) 5- pin to - 247 adjustable voltage ( wt ) mic29752 3- pin to - 263 (d 2 pak) (ut) mic29150/29300 5- pin to - 263 (d 2 pak) fixed voltage ( u) mic29151/29301/29501 5- pin to - 263 (d 2 pak) adjustable voltage ( u) mic29302/29502 5- pin to - 263 (d 2 pak) adjustable with flag ( u) mic29153/29303/29503 5- pin to - 252 (d-pak) adjustable voltage (d) mic29152 downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 6 m9999 - 1220 12 -b pin description pin number to - 220 to - 247 to - 263 pin name 1 input : supplies the current to the output power device. 2 gnd : tab is also connected internally to the ics ground on d -pak. 3 output : the regulator output voltage. pin description pin number fixed to - 220 to - 247 to - 263 pin number adjustable to - 220 to - 247 to - 252 to - 263 pin number adj. with flag to - 220 to - 247 to - 263 pin name 1 1 enable : cmos compatible control input. logic high = enable, logic low = shutdown. 2 2 2 input : supplies the current to the output power device 3 , tab 3 , tab 3 , tab gnd : tab is also connected internally to the ics ground on d -pak. 4 4 4 output : the regulator output voltage 5 5 adjust : adjustable regulator feedback input that c onnect s to the resistor voltage divider that is placed from out put to gnd in order to set the output voltage. 5 1 flag : active low error flag output signal that indicates an output fault condition downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 7 m9999 - 1220 12 -b absolute maximum ratings (1) input supply voltage (v in ) ( 1) ........................... C 20v to +60v enable input voltage (v en ) ................................ C 0.3v to v in lead temperature (soldering, 5 sec.) ......................... 260 c power dissipation ..................................... internally limited storage temperature range .................... C 65c to +150c esd rating ................................................................ . note 3 operating ratings (2) operating junction temperature .............. C 40c to +125c maxi mum operating input voltage ................................ 26v package thermal resistance to - 220 ( jc ) ......................................................... 2c/w to - 263 ( jc ) ......................................................... 2c/w to - 247 ( jc ) ..................................................... 1.5c/w to - 252 ( jc ) ......................................................... 3 c/w to - 252 ( ja ) ...................................................... 56 c/w electrical characteristics (4, 13) v in = v out + 1v ; i out = 10ma ; t j = 25c. b old values indicate C 40c t j + 12 5c, unless noted. parameter condition min . typ . max . units output voltage i out = 10ma C1 1 % 10ma i out i fl , (v out + 1v) v in 26v (5) C2 2 line regulation i o ut = 10ma, (v out + 1v) v in 26v 0.06 0.5 % load r egulation v in = v out + 1 v, 10ma i out 1.5a (5,9 ) 0.2 1 % ? v o ?t output voltage (9 ) temperature coef ficient . 20 100 ppm/c dropout voltage ? v out = ? 1% (6 ) mic29150 mic29300 mic29500 mic29750 i out = 100ma i out = 750ma i out = 1.5a i out = 100ma i out = 1.5a i out = 3a i out = 250ma i out = 2.5a i out = 5a i out = 250ma i out = 4a i out = 7.5a 80 220 350 80 250 370 125 250 370 80 270 425 20 0 600 175 600 250 600 200 75 0 mv notes: 1. maximum positive supply voltage of 60v must be of limited duration (<100msec) and duty cycle (1%). the maximum continuous supply voltage is 26v. exceeding the absolute maximum rating may damage the device . 2. the device is not guaranteed to function outside its operating rating. 3. devices are esd sensitive. handling precautions recommended. 4. specific ation for packaged product only. 5. full load current (i fl ) is defined as 1.5a for the mic29150, 3a for the mic29300, 5a for the mic29500, and 7.5a for the m ic29750 families. 6. dropout voltage is defined as the input - to - output differential when the output voltage drops to 99% of its normal value with v out + 1v applied to v in . 7. v in = v out (nominal) + 1v. for example, use v in = 4.3v for a 3.3v regulator or use 6v for a 5v regulator. employ pulse - testing procedures to pin current. 8. ground pin current is the regulator quiescent current. the total current drawn from the source is the sum of the load current plus the ground pin current. 9. output voltage temperature coefficient is defined as the worst case voltage change divided by the t otal temperature range. 10. thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is appl ied, excluding load or line regulation effects. specifications are for a200ma load pulse at vin = 20v (a 4w pulse) for t = 10ms. 11. comparator thresholds are expressed in terms of a voltage differential at the adjust term inal below the nominal reference voltage measured at 6v input. to express these thresholds in terms of output voltage change, multiply by the error ampli fier gain = v out /v ref = (r1 + r2)/r2. for example, at a programmed output voltage of 5v, the error output is guaranteed to go low when the output drops by 95mv x 5v /1.240v = 384mv. thresholds remain constant as a percent of v out as v out is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. 12. v en 0.8v and v in 26v, v out = 0. 13. when used in dual supply systems where the regulator load is returned to a negative supply, the output vol tage must be diode clamped to ground. downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 8 m9999 - 1220 12 -b electrical characteristics (4, 13) (continued) v in = v out + 1v; i out = 10ma; t j = 25c. bold values indicate C 40c t j +125c, unless noted. parameter condition min . typ . max . units ground current mic29150 mic29300 mic29500 mic29750 note 8 i out = 750ma, v in = v out + 1v i out = 1.5a i out = 1.5a, v in = v out + 1v i out = 3a i out = 2.5a, v in = v out + 1v i out = 5a i out = 4a, v in = v out + 1v i out = 7.5a 8 22 10 37 15 70 35 120 20 35 50 75 ma i grnddo ground pin current at dro pout v in = 0.5v less than specified v out i out = 10ma mic29150 mic2 9300 mic29500 mic29750 0.9 1.7 2.1 3.1 ma current limit mic29150 mic29300 mic29500 mic29750 v out = 0v (7) v out = 0v (7) v out = 0v (7) v out = 0v (7) 2.1 4.5 7.5 9.5 3.5 5.0 10.0 15 a e n , output noise voltage (10hz to 100khz) i l = 100ma c l = 10f c l = 33f 400 260 v (rms) ground current in shutdown mic29150/1/2/3 only v en = 0. 4v 2 10 30 a r eference ? mic29xx2/mic29xx3 reference voltage 1.228 1.215 1.240 1.252 1.265 v reference voltage 1.203 1.277 v adjust pin bias current 40 80 120 na reference voltage temperature coefficient note 10 20 ppm/c adjust pin bias current temperature coefficient 0.1 na/c flag output (error comparator) ? mic29xx1/29xx3 output leakage current v oh = 26 v 0.01 1.00 2.00 a output low voltage devic e set for 5v, v in = 4.5v i ol = 250a 220 300 400 mv upper threshold voltage device set for 5v (11) 40 25 60 mv lower threshold voltage device set for 5v (11) 75 95 140 mv hysteresis device set for 5v (11) 15 mv downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 9 m9999 - 1220 12 -b electrical characteristics (4, 13) (continued) v in = v out + 1v; i out = 10ma; t j = 25c. bold values indicate C 40c t j +125c, unless noted. parameter condition min . typ . max . units enable input ? mic29xx1/mic29xx2 input logic voltage low (off) high (on) 2.4 0.8 v enable pin input current v en = 26v 100 600 750 a v en = 0.8v 0.7 2 4 regulator output current in shutdown note 12 10 500 a downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 10 m9999 - 1220 12 -b typical characteristics ( mic2915x ) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 11 m9999 - 1220 12 -b typical characteristics (mic2915x) (continued) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 12 m9999 - 1220 12 -b typical characteristics (mic29 30 x) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 13 m9999 - 1220 12 -b typical characteristics (mic2930x) (continued) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 14 m9999 - 1220 12 -b typ ical characteristics ( mic2950x ) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 15 m9999 - 1220 12 -b typical characteristics (mic2950x) (continued) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 16 m9999 - 1220 12 -b typical characteristics ? mic2975x downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 17 m9999 - 1220 12 -b typical characteristics ? mic2975x (continued) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 18 m9999 - 1220 12 -b functional diagram downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 19 m9999 - 1220 12 -b application information the mic29150/29300/29500/297 50 a re high - performance low - dropout voltage regulators suitable for all moderate to high - current voltage regulator applications. their 3 50 mv to 4 25 mv typical dropout voltage at full load make them especially valuable in battery powered systems and as high efficiency noise filters in post - regulator applications. unlike older npn - pass transistor designs, where the minimum dropout voltage is limited by the base - emitter voltage drop and collector - emitter saturation voltage, dropout performance of the pnp output of these devices is limited merely by the low v ce saturation voltage. a trade - off for the low - dropout voltage is a varying base driver r equirement. but micrels super ?eta pnp ? process reduces this drive requirement to merely 1% of the load current. the mic29150/29300/29500/29750 family of regulators are fully protected from damage due to fault conditions. current limiting is provided. this limiting is linear; output current under overload conditions is constant. thermal shutdown disables the device when the die temperature exceeds the 125c maximum safe operating temperature. line t ransient protection allows device (and load) survival even when the input voltage spikes between C 20v and +60v. when the input voltage exceeds approximately 32 v, the over voltage sensor disables the regulator. the output structure of these regulators allows voltages in excess of the desired output voltage to be applied without reverse current flow. mic29xx1 and mic29xx2 versions offer a logic level on/off control: when disabled, th e devices draw nearly zero current. an additional feature of this regulator family is a common pinout: a designs current requirement may change up or down yet use the same board layout, as all of these regulators have identical pinouts. mic29xxx out v out in gnd v in figur e 3. linear regulators r equire only two c apacitors for operation thermal design linea r regulators are simple to use. the most complicated design parameters to consider are thermal characteristics. thermal design requires the following application - specifi c parameters: ? maximum ambient temperature, t a ? output current, i out ? output voltage, v out ? input voltage, v in first, we calculate the power dissipation of the regulator from these numbers and the device parameters from this datasheet. ( ) out in out d v v 1.01 i p ? = eq. 1 w here the ground current is approximated by 1% of i out . then the heat sink thermal resistance is determined with equation 2 : ( ) cs jc d a jmax sa p t t + ? ? = eq. 2 w here t jmax 125c and cs is between 0 and 2c/w. 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 distribut e the heat between this resistor and the regulator. the low - dropout properties of micrel super ?eta pnp ? regulators allow very significant reductions in regulator power dissipation and the associated heat sink without compromising performance. when this te chnique is employed, a capacitor of at least 0.1f is needed directly between the input and regulator ground. please refer to application note 9 and application hint 17 for further details and examples on thermal design and heat sink specification. with no heat sink in the application, calculate the junction temperature to determine the maximum power dissipation that will be allowed before exceeding the maximum junction temperature of the mic 2915 2. the maximum power allowed can be calculated using the therm al resistance ( ja ) of the d - pak adhering to the following criteria for the pcb design: 2 oz. copper and 100mm 2 copper area for the mic 29152. downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 20 m9999 - 1220 12 -b for example, given an expected maximum ambient temperature (t a ) of 75 c with v in = 3.3 v, v out = 2 .5v, and i out = 1 .5a, first c alculate the expected p d using equation 3: p d =( 3.3 vC 2. 5v) 1 .5a C(3.3 v)(0.0 16 a)= 1.1 472 w eq. 3 next, calcualte the junction temperature for the expected power dissipation. t j =( ja p d )+ t a = (56 c/w 1.1472 w)+ 75 c = 139 .2 4 c eq. 4 now determine the maximum power dissipation allowed that would not exceed the ics maximum junction temperature (125 c) without the useof a heat sink by : p d(max) = (t j(max) Ct a )/ ja = (125 cC 75 c)/(56 c/w) = 0.893w eq. 5 capacitor requirements for stability and minimum output noise, a capacitor on the regulator output is necessary. the value of this capacitor is dependent upon the output current; lower cur rents allow smaller capacitors. the mic29150/29300/29500/29750 regulators are stable with the following minimum capacitor values at full load , as noted in table 1 : device full load capacitor mic29150 10 f mic29300 10 f mic29500 10 f mic29750 22 f table 1. minimum capacitor values at full load this capacitor need not be an expensive low esr type: aluminum electrolytics are adequate. in fact, extremely low esr capacitors may contribute to instability. tantalum capacitors are recommended for systems where fast load transient response is important. where the regulator is powered from a source with high ac impedance, a 0.1 f capacitor connected between input and gnd is recommended. this capacitor should have good characteristics to above 250khz. minimum load current the mic29150 C 29750 regulators are specified between finite loads. if the output current is too small, leakage currents dominate and the output voltage rises. the following minimum load current swamps any expected leakage current across the operating temperature range , as shown in table 2 : device minimum load mic29150 5ma mic29300 7ma mic29500 10 ma mic29750 10 ma table 2. minimum load currents adjustable regulator design the adjustable regulator versions, mic29xx2 and mic29xx3, allow programming the output voltage a nywhere between 1.25v and the 25 v. two resistors are used. the resistor values are calculated by equation 6 : ? ?? ? ? ?? ? ? = 1 1.240 v r r out 2 1 eq. 6 w here v out is the desired output voltage. figure 4 shows component definition. applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation (see minimum load c urrent sub - section ). downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 21 m9999 - 1220 12 -b r1 r2 v in v out mic 2915 2bt 22f 10f figure 4. adjustable regulator with resistors error flag mic29xx1 and mic29xx3 versions feature an error flag, which looks at the output voltage and signals an error condition when this voltage drops 5% below its expected value. the error flag is an open - collector output that pulls low under fault conditions. it may sink 10ma. low output voltage signifies a number of possible problems, including an overcurrent fault (the device is in current limit) and low input voltage. the flag output is inoperative during overtemperature shutdown conditions. enable input mic29xx1 and mic29xx2 versions feature an enable (en) input that allows on/off control of the device. special design allows zero current drain when the device is disabled only microamperes of leakage current flows. the en input has ttl/cmos compatible thresholds for simple interfacing with logic, or may be directly ti ed to 30v. enabling the regulator requires approximately 20a of current. downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 22 m9999 - 1220 12 -b package information (1) 3- pin to - 220 (t) 5- pin to - 220 (t) note: 1. package information is correct as of the publication date. for updates and most current infor mation, go to www.micrel.com . downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 23 m9999 - 1220 12 -b package information (1) (continued) 5- pin to - 263 (u ) 3- pin to - 263 (u ) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 24 m9999 - 1220 12 -b package information (1) (continued) 5- pin to - 247 ( w t) 3- pin to - 247 ( w t) downloaded from: http:///
micrel, inc. mic29150/29300/29500/29750 december 2012 25 m9999 - 1220 12 -b package information (1) (continued) 5- pin to - 252 ( d) micrel, inc. 2180 for tune 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 comp leteness of the informa tion furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for its us e. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. except as provided in micrels terms and conditions of sale for such products, mic rel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/ or use of micrel products including liability or warrant ies relating to fitness for a particular purpose, merchantability, or infringement of any paten t, copyright or other intellectual p roperty right. micrel products are not designed or authorized for use as components in life support appl iances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. life support devices or systems are devic es 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 res ult in a significant injury to the user. a purchasers use or sale of micrel products for use in life support appliances, devices or systems is a purchasers own risk and purchaser agrees to f ully indemnify micrel for any damages resulting from such use or sale. ? 2012 micrel, incorporated. downloaded from: http:///

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