Maker : Fairchild Semiconductor
Part No. : LM317M

Datasheet PDF : LM317M.pdf
Cross Reference : LM317M Cross Reference
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Product Information

www.DataSheet4U.com 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 12 3 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. 1.0.2 ©2002 Fairchild Semiconductor Corporation LM317M Absolute Maximum Ratings Parameter Input-Output Voltage Differential Power Dissipation Thermal Resistance Junction-Air D-PAK (Note1,2) Operating JunctionTemperature Range Storage Temperature Range Symbol VI - V O PD RθJA Tj TSTG Value 40 Internally Limited 100 0 ~ +125 -65 ~ +125 Unit V W °C/W °C °C Electrical Characteristics (VI-VO = 5V, IO = 0.1A, 0°C ≤ TJ ≤ +125°C, PDMAX = 7.5W, unless otherwise specified) Parameter Line Regulation (Note3) Symbol Rline Conditions TA = +25°C, 3V ≤ VI −VO ≤ 40V 3V ≤ VI −VO ≤ 40V TA =+25°C, 10mA ≤ IO ≤ 0.5A VO ≤ 5V VO ≥ 5V 10mA ≤ IO ≤ 0.5A VO ≤ 5V VO ≥ 5V Adjustment Pin Current Adjustment Pin Current Change Reference Voltage Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current RMS Noise, % of VOUT Ripple Rejection Long-Term Stability IADJ ∆IADJ VREF STT IL(MIN) VI - VO = 40V VI - VO ≤ 15V, PD < PDMAX IO(MAX) eN RR ST VI - VO = 40V PD < PDMAX, TA =+25°C TA = +25°C, 10Hz < f < 10KHz VO = 10V, f = 120Hz without CADJ CADJ = 10uF (Note4) TJ =+125°C, 1000Hours 3V ≤ VI - VO ≤ 40V 10mA ≤ IO ≤ 0.5A, PD < PDMAX Min. Typ. 0.01 0.02 5 0.1 20 0.3 50 0.2 1.25 0.7 3.5 0.9 0.25 0.003 65 80 0.3 Max. 0.04 0.07 25 0.5 70 1.5 100 5 1.30 10 1 A %/ VO dB %/1000Hrs mV %/ VO mV %/ VO uA uA V %/ VO mA Unit %/ V Load Regulation (Note3) Rload - 3V < VI - VO < 40V 1.20 10mA ≤ IO ≤ 0.5A, PD < PDMAX 0.5 0.15 66 - Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow. 3. 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. 4. 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 Package Dimensions in millimeters 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 [2.30±0.20] 0.76 ±0.10 2.30TYP [2.30±0.20] 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) Pac...

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