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1/11 november 2005 output current: 3a internal current and thermal limiting typical output impedance: 0.01 ? minimum input voltage: 7.5v power dissipation: 30w description the lm123, lm223, LM323 are three-terminal positive voltage regulators with a preset 5v output and a load driving capability of 3a. new circuit design and processing techniques are used to provide the high output current without sacrificing the regulation characteristics of lower current devices. the 3a regulator is virtually blowout proof. current limiting, power limiting and thermal shut-down provide the same high level of reliability obtained with these techniques in the lm209, 1a regulator. an overall worst case specification for the combined effects of input voltage, load current, ambient temperature, and power dissipation ensure that the lm123, lm223, LM323 will perform satisfactorily as a system element. lm123/lm223 LM323 three-terminal 3a-5v positive voltage regulators schematic diagram to-220 to-3 rev. 3
lm123-lm223-LM323 2/11 table 1: absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi on is not implied. table 2: thermal data figure 1: connection diagram (top view) table 3: order codes symbol parameter value unit v i input voltage 20 v i o output current internally limited p tot power dissipation internally limited t stg storage temperature range -65 to 150 c t oper operating junction temperature range lm123 -55 to 150 c lm223 -25 to 125 LM323 0 to 125 symbol parameter to-220 to-3 unit r thj-case thermal resistance junction-case max 32c/w r thj-amb thermal resistance junction-ambient max 50 35 c/w type to-220 to-3 temperature range lm123 lm123k -55c to 150c lm223 lm223k -25c to 150c LM323 LM323t LM323k 0c to 125c to-220 to-3
lm123-lm223-LM323 3/11 table 4: electrical characteristics of lm123/lm223 (t j = -55 to 150c for lm123, t j = -25 to 150c for lm223 unless otherwise specified). notes: 1. although power dissipation is internally limited, specifications apply only for p 30w. 2. selected devices with tightened tolerance output voltage available. 3. load and line regulation are specified at constant junction temperature. pulse testing is required with a pulse width 1ms and duty cycle 5%. table 5: electrical characteristics of LM323 (t j = 0 to 150c, unless otherwise specified). notes: 1. although power dissipation is internally limited, specifications apply only for p 30w. 2. selected devices with tightened tolerance output voltage available. 3. load and line regulation are specified at constant junction temperature. pulse testing is required with a pulse width 1ms and duty cycle 5%. symbol parameter test conditions min. typ. max. unit v o output voltage range (note 2) t a = 25c, v i = 7.5 v, i o = 0 4.7 5 5.3 v v o output voltage range (note 2) t j = t min to t max p p max v i = 7.5 to 15 v i o = 0 to 3 a 4.6 5.4 v k vi line regulation (note 3) v i = 7.5 to 15 v t j = 25c 5 25 mv k vo load regulation (note 3) i o = 0 to 3 av i = 7.5 v t j = 25c 25 100 mv i ib quiescent current v i = 7.5 to 15 v i o = 0 to 3 a 12 20 ma v no output noise voltage t a = 25c f = 10 hz to 100 khz 40 v rms i os short circuit current limit v i = 15 v t j = 25c 3 4.5 a v i = 7.5 v t j = 25c 4 5 k vh long term stability 35 mv symbol parameter test conditions min. typ. max. unit v o output voltage range (note 2) t a = 25c, v i = 7.5 v, i o = 0 4.8 5 5.2 v v o output voltage range (note 2) t j = t min to t max p p max v i = 7.5 to 15 v i o = 0 to 3 a 4.75 5.25 v k vi line regulation (note 3) v i = 7.5 to 15 v t j = 25c 5 25 mv k vo load regulation (note 3) i o = 0 to 3 av i = 7.5 v t j = 25c 25 100 mv i ib quiescent current v i = 7.5 to 15 v i o = 0 to 3 a 12 20 ma v no output noise voltage t a = 25c f = 10 hz to 100 khz 40 v rms i os short circuit current limit v i = 15 v t j = 25c 3 4.5 a v i = 7.5 v t j = 25c 4 5 k vh long term stability 35 mv
lm123-lm223-LM323 4/11 figure 2: output noise voltage figure 3: output impedance figure 4: peak available output current figure 5: short circuit current figure 6: ripple rejection figure 7: dropout voltage
lm123-lm223-LM323 5/11 figure 8: line transient response figure 9: output voltage figure 10: quiescent current figure 11: load transient response
lm123-lm223-LM323 6/11 typical application figure 12: basic 3a regulator c 1 = required if regulator is distant from filter capacitors. c l = regulator is stable with no load capacitor into resistive loads. figure 13: trimming output to 5v
lm123-lm223-LM323 7/11 figure 14: 10a regulator with complete overload protection * selected for 20 ma current from unregulated negative supply. ** solid tantalum. a = lm101a, lm201a, lm301a. figure 15: adjustable regulator 0 - 10v/3a a1 = lm101a, lm201a, lm301a. ci = 2f optional - improves ripple rejection, noise and transient response.
lm123-lm223-LM323 8/11 dim. mm. inch min. typ max. min. typ. max. a 11.85 0.466 b 0.96 1.05 1.10 0.037 0.041 0.043 c 1.70 0.066 d 8.7 0.342 e 20.0 0.787 g 10.9 0.429 n 16.9 0.665 p 26.2 1.031 r 3.88 4.09 0.152 0.161 u 39.5 1.555 v 30.10 1.185 to-3 mechanical data p003c/c e b r c d a p g n v u o
lm123-lm223-LM323 9/11 dim. mm. inch min. typ max. min. typ. max. a 4.40 4.60 0.173 0.181 c 1.23 1.32 0.048 0.051 d 2.40 2.72 0.094 0.107 d1 1.27 0.050 e 0.49 0.70 0.019 0.027 f 0.61 0.88 0.024 0.034 f1 1.14 1.70 0.044 0.067 f2 1.14 1.70 0.044 0.067 g 4.95 5.15 0.194 0.203 g1 2.4 2.7 0.094 0.106 h2 10.0 10.40 0.393 0.409 l2 16.4 0.645 l4 13.0 14.0 0.511 0.551 l5 2.65 2.95 0.104 0.116 l6 15.25 15.75 0.600 0.620 l7 6.2 6.6 0.244 0.260 l9 3.5 3.93 0.137 0.154 dia. 3.75 3.85 0.147 0.151 to-220 mechanical dat a p011c
lm123-lm223-LM323 10/11 table 6: revision history date revision description of changes 04-nov-2005 3 updated curves, no content change.
lm123-lm223-LM323 11/11 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2005 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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