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1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 1 - htc to-220 3l / 5l pkg to-263 3l / 5l pkg to-252 3l / 5l pkg ordering information device package lm29150t-x.x lm29151t-x.x lm29152t to-220 3l / 5l lm29150r-x.x lm29151r-x.x lm29152r to-263 3l / 5l lm29150rs-x.x lm29151rs-x.x lm29152rs to-252 3l / 5l features z high current capability 1.5a z low dropout voltage 350mv z low ground current z accurate 1% guaranteed initial tolerance z extremely fast transient response z reverse-battery and "load dump" protection z zero-current shutdown mode(5-pin version) z error flag signals output out-of-regulation (5-pin version) z also characterized for smaller loads with industry -leading performance specifications z fixed voltage and adjustable versions z moisture sensitivity level 3 application z battery powered equipment z high-efficiency " green" computer system z automotive electronics z high-efficiency linear power supplies z high-efficiency post-regulator for switching supply descripsion x.x = output voltage = 1.5, 1.8, 2.5, 3.0, 3.3, 5.0, 12 the lm29150, lm29151 and lm29152 are high current, high accuracy, and low-dropout voltage regulators. using process with a pnp pass element, these regulator s feature 350mv (full load) dropout voltages and very low ground current. these devices also find applications in lower current, low dropout-critical systems, where their tiny dropout voltage and ground curre nt values are important attributes. the lm29150, lm29151 and lm29152 are fully protected a gainst over current faults, reversed input polarity, reversed lead insertion, over temperature opera tion, and positive and negative transient voltage spikes. lm29151 features logic level enable control and an error flag which signals whenever the output falls out of regulation. on the lm29151 and lm29152, the enable pin may be tied to vin if it is not required for on/off control. absolute maximum ratings characteristic symbol min. max. unit input supply voltage (note 1) v in - 20 + 60 v lead temperature(soldering, 5 sec) t sol - 260 storage temperature range t stg -65 + 150
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 2 - htc recommended operating ratings (note 2) characteristic symbol min. max. unit operating input voltage v in - + 26 v junction temperature t j -40 + 125 ordering information v out package order no. description supplied as status to-220 3l lm29150t-1.5 1.5a, fixed tube active to-220 5l lm29151t-1.5 1.5a, fixed, enable tube active to-263 3l lm29150r-1.5 1.5a, fixed reel active to-263 5l lm29151r-1.5 1.5a, fixed, enable reel active to-252 3l lm29150rs-1.5 1.5a, fixed reel active 1.5 v to-252 5l lm29151rs-1.5 1.5a, fixed, enable reel active to-220 3l lm29150t-1.8 1.5a, fixed tube active to-220 5l lm29151t-1.8 1.5a, fixed, enable tube active to-263 3l lm29150r-1.8 1.5a, fixed reel active to-263 5l lm29151r-1.8 1.5a, fi xed, enable reel active to-252 3l lm29150rs-1.8 1.5a, fixed reel active 1.8 v to-252 5l lm29151rs-1.8 1.5a, fixed, enable reel active to-220 3l lm29150t-2.5 1.5a, fixed tube active to-220 5l lm29151t-2.5 1.5a, fixed, enable tube active to-263 3l lm29150r-2.5 1.5a, fixed reel active to-263 5l lm29151r-2.5 1.5a, fixed, enable reel active to-252 3l lm29150rs-2.5 1.5a, fixed reel active 2.5 v to-252 5l lm29151rs-2.5 1.5a, fixed, enable reel active to-220 3l lm29150t-3.0 1.5a, fixed tube active to-220 5l lm29151t-3.0 1.5a, fixed, enable tube active to-263 3l lm29150r-3.0 1.5a, fixed reel active to-263 5l lm29151r-3.0 1.5a, fixed, enable reel active to-252 3l lm29150rs-3.0 1.5a, fixed reel active 3.0 v to-252 5l lm29151rs-3.0 1.5a, fixed, enable reel active to-220 3l lm29150t-3.3 1.5a, fixed tube active to-220 5l lm29151t-3.3 1.5a, fixed, enable tube active to-263 3l lm29150r-3.3 1.5a, fixed reel active to-263 5l lm29151r-3.3 1.5a, fixed, enable reel active to-252 3l lm29150rs-3.3 1.5a, fixed reel active 3.3 v to-252 5l lm29151rs-3.3 1.5a, fixed, enable reel active
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 3 - htc ordering information v out package order no. description supplied as status to-220 3l lm29150t-5.0 1.5a, fixed tube active to-220 5l lm29151t-5.0 1.5a, fixed, enable tube active to-263 3l lm29150r-5.0 1.5a, fixed reel active to-263 5l lm29151r-5.0 1.5a, fi xed, enable reel active to-252 3l lm29150rs-5.0 1.5a, fixed reel active 5.0 v to-252 5l lm29151rs-5.0 1.5a, fixed, enable reel active to-220 3l lm29150t-12 1.5a, fixed tube active to-220 5l lm29151t-12 1.5a, fixed, enable tube active to-263 3l lm29150r-12 1.5a, fixed reel active to-263 5l lm29151r-12 1.5a, fixed, enable reel active to-252 3l lm29150rs-12 1.5a, fixed reel active 12 v to-252 5l lm29151rs-12 1.5a, fixed, enable reel active to-220 5l lm29152t 1.5a, adjustable, enable tube active to-263 5l lm29152r 1.5a, adjustable, enable reel active adj to-252 5l lm29152rs 1.5a, adjustable, enable reel active package type root name product code lm 2915x output voltage : 1.5v / 1.8v / 2.5v / 3.0v / 3.3v / 5.0v / 12v / blank(adj only) t r rs : to-220 : to-263 : to-252 29150 : 3l fixed output 29151 : 5l fixed output 29152 : 5l adjustable output
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 4 - htc pin configuration to-263 3l to-263 5l to-252 3l to-252 5l to-220 3l to-220 5l pin description to-220 / to-263 / to-252 3l (for lm29150) to-220 / to-263 / to-252 5l (for lm29151/2) pin no. name function name function 1 v in input supply en chip enable 2 gnd ground v in input supply 3 v out output voltage gnd ground 4 - - v out output voltage 5 - - flg / adj error flag output or output adjust 3 output 2 gnd 1 input 3 output 2 gnd 1 input 5 flg / adj 4 output 3 gnd 2 input 1 en 5 flg/adj 4 output 3 gnd 2 input 1 en 5 flg / adj 4 output 3 gnd 2 input 1 en 3 output 2 gnd 1 input
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 5 - htc typical application - typical fixed output application vin out gnd c out + 5v 5% 3.3v 1% @ 1.5a lm29150-3.3 c in + - typical adjustable output application vin out en adj gnd c out + r1 r2 c in + v out v in lm29152 v out = v ref x [1 + (r1/r2)] * * for best results, the total series resistance should be small enough to pass the minimum regulator load current.
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 6 - htc electrical characteristics i out =100ma, t a =25 , unless otherwise specified. bold values are guaranteed across th e operating temperature range. adjustable versions are programmed to 5.0v. symbol parameter condition min typ max units i o = 10ma -1 1 v out output voltage 10ma i o i fl , (v out +1v) v in 26v (note 2) -2 2 % v line line regulation i o = 10ma, (v out +1v) v in 26v 0.06 0.5 % v load load regulation v in =v out +5v, 10ma i out i fulload (note 2,6) 0.2 1 % vo/ t output voltage temp. coefficient output voltage (note 6) , temp. coefficient 20 100 ppm/ v do dropout voltage v out = -1%, (note 3) i o =100ma i o =750ma i o =1.5a 80 220 350 200 600 mv i gnd ground current i o =750ma, v in =v out +1v i o =1.5a 8 22 20 ma i gnddo ground pin current at dropout v in =0.5v less than specified v out , i out =10ma 2 ma i limit current limit lm29150, v out = 0v (note 4) 2.1 3.5 a e n output noise voltage (10hz to 100khz) i l = 100ma c l =10 f c l =33 f 400 260 vrms flag output (error comparator) lm29151 i flg (leak) output leakage current v oh =26v 0.01 1.00 2.00 a v flg (do) output low voltage device set for 5v. v in =4.5v i ol =250 a 220 300 400 mv upper threshold voltage device set for 5v (note 9) 40 25 60 mv lower threshold voltage device set for 5v (note 9) 75 95 140 mv v flg hysteresis device set for 5v (note 9) 15 mv
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 7 - htc reference lm29152 1.228 1.215 1.24 1.252 1.265 v v ref reference voltage (note 8) 1.203 1.277 v i adj adjust pin bias current 40 80 120 na reference voltage temp. coefficient (note 7) 20 ppm/ adjust pin bias current temp. coefficient 0.1 na/ enable input lm29151 / lm29152 v en enable input voltage logic low (off) logic high (on) 2.4 0.8 v v en =26v 100 600 750 a i en enable pin input current v en =0.8v 2.5 5 a regulator output current shutdown (note 10) 10 500 a note 1. maximum positive supply voltage of 60v mu st be of limited duration (<100msec) and duty cycle( 1%). the maximum continuous supply voltage is 26v. note 2. full load current (i fl ) is defined as 1.5a. note 3. dropout voltage is defined as the input-to-output differ ential when the output voltage drops to 99% of its nominal valu e with v out to v in . note 4. 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 minimize temperature rise. note 5. ground pin current is the regulator quiescent current. th e total current drawn from the source is the sum of the load c urrent plus the ground pin current. note 6. output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature ran ge. note 7. thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applie d, excluding load or line regulation effects. specific ations are for a 200ma load pulse at v in = 20v (a 4w pulse) for t= 10ms. note 8. v ref v out (v in -1v), 2.3v v in 26v, 10ma < i l < i fl , t j t j max. note 9. comparator thresholds are expressed in terms of a volt age differential at the adjust terminal below the nominal referen ce voltage measured at. 6v input. to express these thresholds in terms of output voltage change, multiply by the error amplifier 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. thre sholds remain constant as a percent of v out as v out is varied, with the dropout warining occurring at typically 5% below nominal, 7.7% guaranteed. note 10. v en 0.8v and v in 26v, v out =0. note 11. when used in dual supply system where the regulator lo ad is returned to a negative supply, the output voltage must be diode clamped to ground.
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 8 - htc typical operating characteristics lm29150 dropout voltage vs, output current lm29150 dropout voltage vs, temperature lm29150-5.0 dropout characteristics lm29150 ground current vs, supply voltage lm29150 ground current vs, temperature lm29150 ground current vs, temperature lm29150-3.3 output voltage vs. temperature lm29150-3.3 short circuit current vs. tem p erature lm29150 ground current vs. input voltage
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 9 - htc application information the lm29150 are high performance low-dropout voltage regulators suitable for all moderate to high current voltage regulator applications. their 350mv dropout vo ltage at full load makes them especially valuable in battery powered systems and as high efficiency noise f ilters in "post-regulator" applications. unlike older npn-pass transistor designs, dropout performance of the pnp output of these devices is limited merely by the low v ce saturation voltage. the lm29150 family of regulators is fully protected fr om 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 125 maximum safe operating temperature. transient protection allows device survival even w hen the input voltage spikes between -20v and +60v. when the input voltage exceeds about 35v to 40v, the over voltage sensor temporarily disables the regulator. figure 1. linear regulators require only two capacitors for operation. thermal design linear regulators are simple to use. the most complicated design parameters to consider are thermal characteristics. thermal desi gn requires the following application-specific 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 re gulator from these numbers and the device parameters from this datasheet. p d =i out (1.01v in -v out ) where the ground current is approximated by 1% of i out . then the heat sink thermal resistance is determined with this formula: () cs jc d a jmax sa + - p t - t = where t jmax 125 and cs is between 0 and 2 /w.
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 10 - htc capacitor requirements for stability and minimum output noise, a capacitor on t he regulator output is necessary. the value of this capacitor is dependent upon the output current; lower currents allow smaller capacitors. lm29150 regulators are stable with the 10uf minimum capacitor va lues at full load. where the regulator is powered from a source with a high ac impedance, a 0.1uf capacitor connected between input and gnd is recommended. this capacitor should ha ve good characteristics to above 250khz. minimum load current the lm29150 regulators are specified between finite load s. if the output is too small, leakage currents is too small, leakage currents dominate and the output voltage rises. the 5ma minimum load current swamps any expected leakage current across t he operating temperature range. adjustable regulator design the adjustable regulator versions, lm29152 allows programming the output voltage anywhere between 1.25v and the 26v maximum operating rating of the family. two resistors are used. resistors can be quite large, up to 1m , because of the very high input impedance and low bias current of the sense comparator: the resistor values are calculated by: ) 1 - v v ( 2 =r 1 r ref out where v out is desired output voltage, figure 2 shows comp onent definition. applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation. vin out en adj gnd c out + r1 r2 c in + v in v out v out = 1.240 x [1 + (r1/r2)] figure 2. adjustable regulator with resistors error flag lm29151 versions feature and error flag, which looks at the output voltage and signals and error condition when this 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, includi ng an over-current fault (the device is in current limit) and low input voltage. the flag output is inoperati ve during over temperature shutdown conditions.
1.5a very l.d.o voltage regulator lm29150/29151/29152 nov. 2009 - rev. 1.2 - 11 - htc enable input lm29151 and lm29152 versions feature and enable (en) in put 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 th resholds for simple interfacing with logic, or may be directly tied to 30v. enabling the regulator requires approximately 20ua of current.

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