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| LM317T (KA317) LM317T (KA317) Adjustable Voltage Regulator (Positive) 3-TERMINAL POSITIVE ADJUSTABLE REGULATOR This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply 2.2A typical of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shutdown and safe area compensation. TO-220 FEATURES * * * * * * Output Current 2.2A Typical Output Adjustable Between 1. 2V and 37V Internal Thermal-Overload Protection Internal Short-Circuit Current-Limiting Output Transistor Sate-Area Compensation TO-220 Package ORDERING INFORMATION Device LM317T (KA317) Package TO-220 Operating Temperature 0C ~ +125C BLOCK DIAGRAM Vin 3 + - Voltage Reference Production Circuitry Rlimit 2 Vo 1 Vadj (c)2000 Fairchild Semiconductor International Rev. B, May 2000 LM317T (KA317) ABSOLUTE MAXIMUM RATINGS (TA= +25C, unless otherwise specified) Characteristic Input-Output Voltage Differential Lead Temperature Power Dissipation Operating Temperature Range Storage Temperature Range Temperature Coefficient of Output Voltage Symbol VI - VO TLEAD PD TOPR TSTG VO/T Value 40 230 Internally limited 0 ~ +125 -65 ~ +125 0.02 Unit V C W C C %/C ELECTRICAL CHARACTERISTICS (VI - VO = 5V, IO = 0.5A, 0C TJ +125C, IMAX = 1.5A, PMAX = 20W, unless otherwise specified) Characteristic Line Regulation Load Regulation Symbol Rline Rload TA = +25C Test Conditions 3V VI - VO 40V 3V VI - VO 40V TA = +25C, 10mA IO IMAX VO < 5V VO 5V 10mA IO IMAX VO < 5V VO 5V Min Typ 0.01 0.02 18 0.4 40 0.8 46 2.0 Max 0.04 0.07 25 0.5 70 1.5 100 5 Unit %/V %/V mV %/VO mV %/VO A A Adjustable Pin Current Adjustable Pin Current Change IADJ IADJ Reference Voltage VREF 3V VI - VO 40V 10mA IO IMAX P PMAX 3V VIN - VOUT 40V 10mA IO IMAX PD PMAX VI - VO = 40V VI - VO 15V, PD PMAX VI - VO 40V, PD PMAX, TA = 25C TA= +25C, 10Hz f 10KHz VO = 10V, f = 120Hz without CADJ CADJ = 10F TA = +25C for end point measurements, 1000HR 1.20 1.25 1.30 V Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current RMS Noise, % of VOUT Ripple Rejection STt L(MIN) IO(MAX) eN RR 0.7 3.5 1.0 2.2 0.3 0.003 60 75 0.3 5 12 %/VO mA A 0.01 %/VO dB 66 Long-Term Stability, TJ = THIGH Thermal Resistance Junction to Case * ST RJC 1 % C/W 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) (c)2000 Fairchild Semiconductor International Rev. B, May 2000 LM317T (KA317) TYPICAL PERFORMANCE CHARACTERISTICS Fig. 1 Load Regulation OUTPUT VOLTAGE DEVIATION (%) 0.2 0 -0.2 IL = 1.5A Fig. 2 Adjustment Current 55 Adjustment Current (A) 125 IL = 0.5A 50 -0.4 -0.6 -0.8 -1.0 0 25 50 75 100 TEMPERATURE (C) 45 40 35 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) Fig. 3 Dropout Voltage INPU-OUTPUT VOLTAGE DIFFERENTIAL (V) 3 Vo = 100mV IL = 1.5A Fig. 4 Reference Voltage 1.26 REFERENCE VOLTAGE (V) 125 1.255 1.25 1.245 1.24 1.235 -50 -25 2.5 IL = 1A 2 IL = 500mA IL = 200mA 1.5 IL = 20mA 1 0 25 50 75 100 TEMPERATURE (C) 0 25 50 75 100 125 TEMPERATURE (C) (c)2000 Fairchild Semiconductor International Rev. B, May 2000 LM317T (KA317) Typical Application VI VI KA317 Vadj Vo R1 Ci 0.1F Iadj R2 adj Co 0.1F Vo = 1.25V (1 + R2/R1) + Iadj R2 Fig. 5 Programmable Regulator Ci is required when regulator is located at an appreciable distance from the power supply filter. Co improves transient response by reducing AC noise which is present at the output. Since I ADJ is controlled to less than 100A, the error associated with this term is negligible in most applications. (c)2000 Fairchild Semiconductor International Rev. B, May 2000 LM317T (KA317) TO-220 Package Dimensions TO-220 (FS PKG CODE AE) 9.90 0.20 1.30 0.10 2.80 0.10 (8.70) o3.60 0.10 (1.70) 4.50 0.20 1.30 -0.05 +0.10 9.20 0.20 (1.46) 13.08 0.20 (1.00) (3.00) 15.90 0.20 1.27 0.10 1.52 0.10 0.80 0.10 2.54TYP [2.54 0.20] 2.54TYP [2.54 0.20] 10.08 0.30 18.95MAX. (3.70) ) (45 0.50 -0.05 +0.10 2.40 0.20 10.00 0.20 Dimensions in Millimeters August 1999, Rev B (c)2000 Fairchild Semiconductor International Rev. B, May 2000 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACExTM BottomlessTM CoolFETTM CROSSVOLTTM E2CMOSTM FACTTM FACT Quiet SeriesTM FAST(R) FASTrTM GTOTM DISCLAIMER HiSeCTM ISOPLANARTM MICROWIRETM POPTM PowerTrench(R) QFETTM QSTM Quiet SeriesTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 SyncFETTM TinyLogicTM UHCTM VCXTM FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Preliminary No Identification Needed Full Production Obsolete Not In Production (c)2000 Fairchild Semiconductor International Rev. E |
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