www.fairchildsemi.com LM317M 3-Terminal 0.5A Positive Adjustable Regulator Features 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. 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 D-PAK 2 1 3 1. Adj 2. Output 3. Input TO-220 12 3 Internal Block Diagram V in 3 Input + - V olta ge Re fe re nce P rote ction Circ uitry R lim it 2 Vo Output 1 V ad j Rev. 1.0.4 ©2011 Fairchild Semiconductor Corporation LM317M Absolute Maximum Ratings Parameter Symbol Value Unit Input-Output Voltage Differential V I - VO 40 V PD Internally Limited W RθJC RθJA RθJA 5 81 100 °C/W °C/W °C/W Tj 0 ~ +125 °C TSTG -65 ~ +125 °C Power Dissipation Thermal Resistance Junction-Case (TO-220) Thermal Resistance Junction-Air (TO-220) Thermal Resistance Junction-Air (D-PAK (Note1,2)) Operating Junction Temperature Range Storage Temperature Range Electrical Characteristics (VI-VO = 5V, IO = 0.1A, 0°C ≤ TJ ≤ +125°C, PDMAX = 7.5W, unless otherwise specified) Parameter Line Regulation (Note3) Symbol Conditions Min. Typ. Max. Unit TA = +25°C, 3V ≤ VI −VO ≤ 40V - 0.01 0.04 %/ V Rline 3V ≤ VI −VO ≤ 40V - 0.02 0.07 - Rload TA =+25°C, 10mA ≤ IO ≤ 0.5A VO ≤ 5V VO ≥ 5V 5 0.1 25 0.5 mV %/VO 10mA ≤ IO ≤ 0.5A VO ≤ 5V VO ≥ 5V - 20 0.3 70 1.5 mV %/VO Load Regulation (Note3) Adjustment Pin Current IADJ - - 50 100 uA Adjustment Pin Current Change ΔIADJ 3V ≤ VI - VO ≤ 40V 10mA ≤ IO ≤ 0.5A, PD < PDMAX - 0.2 5 uA Reference Voltage VREF 3V < VI - VO < 40V 1.20 10mA ≤ IO ≤ 0.5A, PD < PDMAX 1.25 1.30 V - 0.7 - %/VO - 3.5 10 mA VI - VO ≤ 15V, PD < PDMAX 0.5 0.9 - VI - VO = 40V PD < PDMAX, TA =+25°C 0.15 0.25 - - 0.003 - %/VO 66 65 80 - dB - 0.3 1 %/1000Hrs Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current STT IL(MIN) IO(MAX) VI - VO = 40V RMS Noise, % of VOUT eN TA = +25°C, 10Hz < f < 10kHz Ripple Rejection RR VO = 10V, f = 120Hz without CADJ CADJ = 10uF (Note4) Long-Term Stability ST TJ = +125°C, 1000Hours A 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 Performance Characteristics Figure 1. Minimum Load Current Figure 3. Adjustment Pin Current vs. Temperature Figure 5. Load Regulation vs. Temperature Figure 2. Peak Output Current vs. Input-Output Differential Voltage Figure 4. Ripple Rejection vs. Frequency Figure 6. Line Regulation vs. Temperature 3 LM317M Typical Performance Characteristics (Continued) Figure 7. Outputvoltage vs. Temperature 4 Figure 8. Thermal Shutdown LM317M Typical Application D1 1N4002 VO Input LM317M Output + 120 1.0uF VADJ 1K 720 KSP2222 TTL CONTROL MINIMUM VO = 1.25V Figure 1. 1 5V Electronic Shutdown Regulator D1 protects the device during an input short circuit. VO LM317M Output Input 240 1N4001 50K VADJ KSP2907 + R2 1.0uF Figure 2. Slow Turn-On Regulator IO Input R1 VO LM317M R2 Output VADJ IADJ I I OMAX V REF 1.25V = ⎛ -----------------⎞ + I ≅ ---------------⎝ R1 ⎠ ADJ R1 V REF 1.25V = ⎛ ----------------------⎞ + I ≅ ---------------------OMAX ⎝ R1 + R2⎠ ADJ R1 + R2 5mA < I O < 500mA Figure 3. Current Regulator 5 LM317M Mechanical Dimensions Package Dimensions in millimeters D-PAK 0.89 ±0.10 MIN0.55 0.91 ±0.10 0.50 ±0.10 9.50 ±0.30 0.76 ±0.10 0.50 ±0.10 1.02 ±0.20 2.30TYP [2.30±0.20] (1.00) (3.05) (2XR0.25) (0.10) 6.60 ±0.20 (5.34) (5.04) (1.50) (0.70) 2.30 ±0.20 (0.90) 2.70 ±0.20 2.30 ±0.10 2.70 ±0.20 2.30TYP [2.30±0.20] (0.50) 6.10 ±0.20 MAX0.96 (4.34) 9.50 ±0.30 0.80 ±0.20 0.60 ±0.20 (0.50) 6.10 ±0.20 5.34 ±0.30 0.70 ±0.20 6.60 ±0.20 0.76 ±0.10 6 LM317M Mechanical Dimensions (Continued) Package Dimensions in millimeters TO-220 [SINGLE GAUGE] 7 LM317M Ordering Information Product Number Package LM317MDT D-PAK LM317MT 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. 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. www.fairchildsemi.com 4/18/11 0.0m 001 Stock#DS400298 © 2011 Fairchild Semiconductor Corporation