UNISONIC TECHNOLOGIES CO., LTD LM317A LINEAR INTEGRATED CIRCUIT MEDIUM CURRENT 1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR DESCRIPTION The UTC LM317A is an adjustable 3-terminal positive voltage regulator, designed to supply 1.5A of output current with voltage adjustable from 1.2V ~ 37V. FEATURES * Output voltage adjustable from 1.2V ~ 37V * Output current in excess of 1.5A * Internal thermal overload protection * Internal short circuit current limiting * Output transistor safe area compensation ORDERING INFORMATION Ordering Number Lead Free Halogen Free LM317AL-AA3-R LM317AG-AA3-R LM317AL-TA3-T LM317AG-TA3-T LM317AL-TN3-R LM317AG-TN3-R LM317AL-TQ2-R LM317AG-TQ2-R LM317AL-TQ2-T LM317AG-TQ2-T Note: Pin Assignment: I: VIN O: VOUT Package SOT-223 TO-220 TO-252 TO-263 TO-263 www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd 1 ADJ ADJ ADJ ADJ ADJ Pin Assignment 2 O O O O O 3 I I I I I Packing Tape Reel Tube Tape Reel Tape Reel Tube 1 of 5 QW-R101-026.D LM317A LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R101-026.D LM317A LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Input-Output Voltage Differential VIN-VOUT 40 V Power Dissipation PD Internally limited Junction Temperature TJ +125 °C Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER Junction to Ambient Junction to Case SYMBOL SOT-223 TO-220 TO-252 TO-263 SOT-223 TO-220 TO-252 TO-263 RATINGS 140 50 103 62.5 23.5 3 12 3 θJA θJC UNIT °C/W °C/W °C/W °C/W °C/W °C/W °C/W °C/W ELECTRICAL CHARACTERISTICS (VIN-VOUT=5V, IOUT=0.5A, PMAX=20W, Ta=25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS Line Regulation ΔVOUT/VOUT 3V≤VIN-VOUT≤40V, IOUT=100mA VOUT≤5V Load Regulation ΔVOUT 10mA≤IOUT≤1.5A VOUT≥5V Adjustable Pin Current IADJ 3V≤VIN-VOUT≤40V, Adjustable Pin Current Change ΔIADJ 10mA≤IOUT≤500mA 3V≤VIN-VOUT≤40V, Reference Voltage VREF 10mA≤IOUT≤1.5A, PD＜PMAX TMIN≤TJ≤TMAX VIN-VOUT=40V VIN-VOUT=40V, PD≤PMAX VIN-VOUT=15V, PD＜PMAX Temperature Stability Minimum Load Current for Regulation IL(MIN) Maximum Output Current IO(MAX) RMS Noise vs. %of VOUT eN 10HZ≤f≤10KHZ Ripple Rejection RR VOUT=10V,f=120HZ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CADJ=0 CADJ=10μF MIN 1.20 TYP 0.01 5 0.1 50 MAX 0.04 25 0.5 100 UNIT %/V mV % μA 0.2 5 μA 1.25 1.30 V 0.7 4.5 0.3 1.5 66 0.4 2.2 0.003 65 80 %/VOUT mA A A %/VOUT dB dB 3 of 5 QW-R101-026.D LM317A LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUITS VIN C1 0.1μF 3 UTC LM317A IADJ 1 D1 1N4002 VOUT 2 R1 Co 1μF VIN 3 UTC LM317A R2 1 1μF 120Ω 1kΩ 720Ω VOUT=1.25V×(1+R2/R1)+IADJ×R2 TTL Level signal C1 is required when regulator is located an appreciated distance from power supply. Co is needed to improve transient response. Fig.1 Programmable voltage regulator VOUT 2 Fig.2 Regulator with On-off control 1.25 V VREF ) + IADJ = R1 R1 VREF 1.25 V IO(MIN) = ( ) + IADJ = R1+ R2 R1+ R2 5mA < IOUT < 100mA IO(MAX ) = ( Fig.3 Soft Start Application UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Fig.4 Constant Current Application 4 of 5 QW-R101-026.D LM317A TYPICAL CHARACTERISTICS Output Current, IOUT (A) Min Output Current, IOUT (mA) Adjustment Current, IADJ (μA) Output Voltage Deviation, ∆VOUT (%) LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R101-026.D