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| www.fairchildsemi.com LM317M 3-Terminal 0.5A Positive Adjustable Regulator Features * * * * * * Output current in excess of 0.5A Output adjustable between 1.2V and 37V Internal thermal overload protection Internal short circuit current limiting Output transistor safe area compensation Floating operation for high voltage applications Description The LM317M is a 3-terminal adjustable positive voltage regulator capable of supplying in excess of 500mA over an output voltage range of 1.2V to 37V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. D-PAK 2 1 3 1. Adj 2. Output 3. Input TO-220 1 23 Internal Block Diagram V in Input 3 + - V olta ge Re fe re nce P rote ction Circ uitry R limit 2 1 V ad j Vo Output Rev. 1.0.1 (c)2001 Fairchild Semiconductor Corporation LM317M Absolute Maximum Ratings Parameter Input-Output Voltage Differential Power Dissipation Operating JunctionTemperature Range Storage Temperature Range Symbol VI - V O PD Tj TSTG Value 40 Internally limited 0 ~ +125 -65 ~+125 Unit V W C C Electrical Characteristics (VI-VO = 5V, IO = 0.1A, 0C TJ + 125C, PDMAX = 7.5W, unless otherwise specified) Parameter Symbol Conditions TA = +25C 3V VI -VO 40V 3V VI -VO 40V TA =+ 25C 10mA IO 0.5A VO 5V VO 5V 10mA IO 0.5A VO 5V VO 5V IADJ IADJ 3V VI - VO 40V 10mA IO 0.5A PD < PDMAX 3V < VI - VO < 40V 10mA IO 0.5A PD < PDMAX VI - VO = 40V VI - VO 15V PD < PDMAX VI - VO = 40V PD < PDMAX, TA =+ 25C RMS Noise, % of VOUT eN TA = +25C 10Hz < f < 10KHz VO = 10V, f = 120Hz without CADJ CADJ = 10uF (Note2) TJ =+ 125C, 1000Hours Min. Typ. 0.01 0.02 Max. 0.04 0.07 Unit %/ V Line Regulation (Note1) Rline Rload Load Regulation (Note1) 5 0.1 20 0.3 50 0.2 25 0.5 70 1.5 100 5 mV %/ VO mV %/ VO uA uA - Adjustment Pin Current Adjustment Pin Current Change Reference Voltage Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current VREF STT IL(MIN) IO(MAX) 1.20 0.5 0.15 - 1.25 0.7 3.5 0.9 0.25 0.003 65 80 0.3 1.30 V %/ VO 10 1 mA A %/ VO Ripple Rejection Long-Term Stability RR ST 66 - dB %/ 1000Hrs Note: 1. Load and Line regulation are specified at constant junction temperature. Change in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 2. CADJ, when used, is connected between the adjustment pin and ground. 2 LM317M Typical Perfomance Characteristics Figure 1. Minimum Load Current Figure 2. Peak Output Current vs. Input-Output Differential Voltage Figure 3. Adjustment Pin Current vs. Temperature Figure 4. Ripple Rejection vs. Frequency Figure 5. Load Regulation vs. Temperature Figure 6. Line Regulation vs. Temperature 3 LM317M Typical Perfomance Characteristics (Continued) Figure 7. Outputvoltage vs. Temperature Figure 8. Thermal Shutdown 4 LM317M Typical Application Input LM317M Output Figure 1. 1 5V Electronic Shutdown Regulator D1 protects the device during an input short circuit. Input LM317M Output Figure 2. Slow Turn-On Regulator Input LM317M Output Figure 3. Current Regulator 5 LM317M Mechanical Dimensions (Continued) Package D-PAK 6.60 0.20 5.34 0.30 (0.50) (4.34) (0.50) 0.70 0.20 2.30 0.10 0.50 0.10 0.60 0.20 6.10 0.20 2.70 0.20 9.50 0.30 0.91 0.10 0.80 0.20 MAX0.96 2.30TYP [2.300.20] 0.76 0.10 2.30TYP [2.300.20] 0.89 0.10 0.50 0.10 1.02 0.20 2.30 0.20 (0.70) (0.90) (0.10) (3.05) 6.10 0.20 9.50 0.30 2.70 0.20 (2XR0.25) 0.76 0.10 (1.00) 6.60 0.20 (5.34) (5.04) (1.50) MIN0.55 6 LM317M Mechanical Dimensions(Continued) Package TO-220 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 7 LM317M Ordering Information Product Number LM317MDT LM317MT Package D-PAK TO-220 Operating Temperature 0 ~ 125 C DISCLAIMER 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 THE PRESIDENT 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, and (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 a significant injury of the user. www.fairchildsemi.com 10/12/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 2. A critical component in 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. |
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