LM317G

LM317 Series  DESCRIPTION The LM317 is an adjustable 3-terminal positive voltage regulator, designed to supply 1.4A of output current with voltage adjustable from 1.2V ~ 37V.  FEATURES * Output voltage adjustable from 1.2V ~ 37V * Output current in excess of 1.4A * Internal thermal overload protection * Internal short circuit current limiting * Output transistor safe area compensation Order Information Type Package LM317 TO-220 LM317F TO-220F2 LM317C TO-263 LM317K TO-263-3 LM317M TO-252 LM317G SOT-223 www.slkormicro.com 1 LM317 Series  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-220F2 TO-252 TO-263/TO-263-3 SOT-223 TO-220/TO-263 TO-263-3 TO-220F2 TO-252 θJA RATINGS 140 50 103 62.5 23.5 UNIT °C/W °C/W °C/W °C/W °C/W 5 °C/W 8 12 °C/W °C/W θJC ELECTRICAL CHARACTERISTICS (VIN-VOUT=5V, IOUT=0.5A, PMAX=20W, TA=25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS Line Regulation ∆VOUT/VOUT 3V≤VIN-VOUT≤40V, IOUT=100mA VOUT≤5V Load Regulation ∆VOUT 10mA≤IOUT≤1.5A VOUT≥5V Adjustable Pin Current IADJ 3V≤VIN-VOUT≤40V, Adjustable Pin Current Change ∆IADJ 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 www.slkormicro.com 2 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 LM317 Series APPLICATION CIRCUITS  VIN C1 0.1μF 3 LM317 IADJ 1 D1 1N4002 VOUT 2 R1 VIN Co 1μF 3 LM317 R2 1 720Ω VOUT=1.25V×(1+R2/R1)+IADJ×R2 1μF 120Ω 1kΩ 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 Fig.2 Regulator with On-off control LM317 LM317 Fig.3 Soft Start Application www.slkormicro.com VOUT 2 Fig.4 Constant Current Application 3 www.slkormicro.com Adjustment Current, IADJ (μA) Output Voltage Deviation, ∆VOUT (%)  Min Output Current, IOUT (mA) Output Current, IOUT (A) LM317 Series TYPICAL CHARACTERISTICS 4