LM317T

TIGER ELECTRONIC CO.,LTD Product specification 3-Terminal Positive Adjustable Regulator Features Output Current In Excess of 1. 5A Output Adjustable Between 1. 2V and 37V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe Operating Area Compensation TO-220 Package O LM317 Description This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5A of load current with anoutput voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shut-down and safe area compensation. Absolute Maximum Ratings ( Ta = 25 C) Parameter Input-Output Voltage Differential Lead Temperature Power Dissipation Operating Junction Temperature Range Storage Temperature Range Temperature Coefficient of Output Voltage Symbol VI -VO TLEAD Typ 40 230 Internally li mited 0~125 -65~150 0.02 Unit V o C PD Tj TSTG Vo/ T W o C 123 o C %/oC TO-220 1. Adj 2. Output 3. Input Electrical Characteristics ( Ta = 25 OC) (VI - VO= 5 V, IO= 0.5 A, 0 C o TJ + 125 C, IMAX = 1.5A,PDMAX = 20W, unless otherwise specified) o Parameter Line Regulation (Note1) Symbol Rline Test Conditions TA = +25oC 3V VI - VO 3V VI - VO o Min - Typ 0.01 0.02 18 0.4 40 0.8 46 2.0 1.25 2.0 0.3 60 75 Max 0.04 0.07 25 0.5 70 1.5 100 5 1.30 Unit %/V 40V 40V IO IMAX Load Regulation (Note1) Rload TA = +25 C, 10mA VO < 5V VO 5V 10mA IO IMAX VO < 5V VO 5V - mV % / VO PMAX 1.20 Adjustable Pin Current Adjustable Pin Current Change Reference Voltage IADJ IADJ VREF IO(MAX) RR 3V VI - VO 40V 10mA IO IMAX PD 3V VIN - VO 40V 10mA IO IMAX PD PMAX VI - VO VI - VO 15V, PD 40V, PD PMAX PMAX A A V Maximum Output Current 1.0 - A Ripple Rejection VO = 10V, f = 120Hz without CADJ CADJ = 10 F (Note2) 66 - dB Note: 1. Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must be taken into account separately. Pulse testing with low duty is used. (PMAX = 20W) 2. CADJ, when used, is connected between the adjustment pin and ground.