LM317

LM317 3-Terminal Positive Adjustable Regulator March 2000 Revised June 2005 LM317 3-Terminal Positive Adjustable Regulator General Description This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5A of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shut-down and safe area compensation. Features s Output Current In Excess of 1.5A s Output Adjustable Between 1.2V and 37V s Internal Thermal Overload Protection s Internal Short Circuit Current Limiting s Output Transistor Safe Operating Area Compensation s TO-220 Package s D2 PAK Package Ordering Code: Product Number LM317T LM317D2TXM Package TO-220 D2 PAK Operating Temperature 0qC to 125qC 0qC to 125qC Connection Diagrams Internal Block Diagram © 2005 Fairchild Semiconductor Corporation DS400281 www.fairchildsemi.com LM317 Absolute Maximum Ratings 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 PD Tj TSTG Value 40 230 Internally limited 0 a 125 Unit V qC W 'VO/'T 65 a 125 r0.02 qC qC % / qC Note 1: Absolute Maximum Ratings: are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Electrical Characteristic ( VI - VO 5V, IO 0.5A, 0qC d TJ d  125qC, IMAX Symbol Rline TA 1.5A, PDMAX 25qC 20W, unless otherwise specified) Conditions Min –– – – Typ 0.01 0.02 18.0 0.4 – – – – 40.0 0.8 46.0 2.0 Max 0.04 0.07 25.0 0.5 70.0 1.5 100 5.0 mV% / VO Unit %/V %/V mV% / VO Parameter Line Regulation (Note 2) 3V d VI  VO d 40V 3V d VI  VO d 40V Load Regulation (Note 2) Rload TA 25qc, 10mA d IO d IMAX V O  5V V O t 5V 10mA d IO d IMAX V O  5V V O t 5V Adjustable Pin Current Adjustable Pin Current Change Reference Voltage IADJ PA PA 'IADJ VREF 3V d VI  VO d 40V 10mA d IO d IMAX PD d PMAX 3V d VIN - VO d 40V 10mA d IO d IMAX PD d PMAX 1.20 – – – 1.0 1.25 0.7 3.5 2.2 0.3 1.30 – 12.0 – 0.01 – 1.0 – V % / VO mA A % / VO dB % Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current STT IL(MIN) IO(MAX) VI - VO 40V VI - VO d 15V, PD d PMAX VI - VO d 40V, PD d PMAX TA 25qC RMS Noise,% of VOUT Ripple Rejection Long-Term Stability, TJ THIGH eN RR ST RTJC TA VO CADJ TA 25qC, 10Hz d f d 10KHz 10V, f 120Hz without CADJ 10PF (Note 3) – 66.0 – – 0.003 60.0 75.0 0.3 5.0 25qC for end point measurements, 1000HR – Thermal Resistance Junction to Case qC / W Note 2: 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 20S) Note 3: CADJ, when used, is connected between the adjustment pin and ground. www.fairchildsemi.com 2 LM317 Typical Performance Characteristics FIGURE 1. Load Regulation FIGURE 2. Adjustment Current FIGURE 3. Dropout Voltage FIGURE 4. Reference Voltage Typical Application Note: Ci is required when regulator is located an appreciable distance from power supply filter. Note: Co is not needed for stability, however, it does improve transient response. Note: Since IADJ is controlled to less than 100PA, the error associated with this term is negligible in most applications. FIGURE 5. Programmable Regulator 3 www.fairchildsemi.com LM317 Physical Dimensions inches (millimeters) unless otherwise noted www.fairchildsemi.com 4 LM317 3-Terminal Positive Adjustable Regulator Physical Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. 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 to the user. 5 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 www.fairchildsemi.com