KA317 / LM317 3-Terminal Positive Adjustable Regulator Features Description • • • • • • This monolithic integrated circuit is an adjustable 3-terminal positive-voltage regulator designed to supply more than 1.5 A of load current with an output voltage adjustable over a 1.2 V to 37 V range. It employs internal current limiting, thermal shutdown, and safe area compensation. Output-Current In Excess of 1.5 A Output-Adjustable Between 1.2 V and 37 V Internal Thermal Overload Protection Internal Short-Circuit Current Limiting Output-Transistor Safe Operating Area Compensation TO-220 Package TO-220 Output 1 1. Adj 2. Output 3. Input Ordering Information Product Number Package Packing Method Operating Temperature LM317T TO-220 (Single Gauge) Rail 0°C to +125°C KA317TU TO-220 (Dual Gauge) Rail 0°C to +125°C Block Diagram Vin 3 Input + - Voltage Reference Protection Circuitry RLIMIT Rlimit 2 Vo Output 1 VAdj Vadj ADJ Figure 1. Block Diagram © 2002 Fairchild Semiconductor Corporation KA317 / LM317 Rev. 1.2.2 www.fairchildsemi.com KA317 / LM317 — 3-Terminal Positive Adjustable Regulator September 2014 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted. Symbol Parameter Value Unit VI - VO Input-Output Voltage Differential 40 V TLEAD Lead Temperature 230 °C 0 to +125 °C TJ TSTG ΔVO/ΔT Operating Junction Temperature Range Storage Temperature Range Temperature Coefficient of Output Voltage -65 to +125 °C ±0.02 %/°C Thermal Characteristics Values are at TA = 25°C unless otherwise noted. Symbol PD Parameter Power Dissipation Value Units Internally Limited W RθJA Thermal Resistance, Junction to Ambient 80 °C/W RθJC Thermal Resistance, Junction to Case 5 °C/W © 2002 Fairchild Semiconductor Corporation KA317 / LM317 Rev. 1.2.2 www.fairchildsemi.com 2 KA317 / LM317 — 3-Terminal Positive Adjustable Regulator Absolute Maximum Ratings VI-VO = 5 V, IO = 0.5 A, 0°C ≤ TJ ≤ +125°C, IMAX = 1.5 A, PDMAX = 20 W, unless otherwise specified. Symbol RLINE RLOAD Parameter Line Regulation(1) Load Regulation(1) Conditions Typ. Max. TA = +25°C, 3 V ≤ VI - VO ≤ 40 V 0.01 0.04 3 V ≤ VI - VO ≤ 40 V 0.02 0.07 VO < 5 V 18 25 mV VO ≥ 5 V 0.4 0.5 %/VO VO < 5 V 40 70 mV VO ≥ 5 V 0.8 1.5 %/VO 46 100 μA 2.0 5.0 μA 1.25 1.30 V TA = +25°C, 10mA ≤ IO ≤ IMAX 10 mA ≤ IO ≤ IMAX IADJ Adjustable Pin Current ΔIADJ Adjustable Pin Current Change 3 V ≤ VI - VO ≤ 40 V, 10 mA ≤ IO ≤ IMAX, PD ≤ PMAX VREF Reference Voltage 3 V ≤ VIN - VO ≤ 40 V, 10 mA ≤ IO ≤ IMAX, PD ≤ PMAX STT Temperature Stability IL(MIN) Minimum Load Current to Maintain Regulation VI - VO = 40 V 3.5 VI - VO ≤ 15 V, PD ≤ PMAX TA = 25°C eN RMS Noise,% of VOUT TA = +25°C, 10 Hz ≤ f ≤ 10 kHz RR Ripple Rejection(2) VO = 10 V, f = 120 Hz ST Long-Term Stability, TJ = THIGH 1.20 0.7 Maximum Output Current IO(MAX) Min. 1.5 %/VO 12.0 mA 2.2 0.3 0.003 without CADJ TA = +25°C for End Point Measurements, 1000 HR %/ V A VI - VO ≤ 40 V, PD ≤ PMAX CADJ = 10 μF Unit 0.010 %/VO 60 dB 66 75 0.3 1.0 % Notes: 1. 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 = 20 W). 2. CADJ, when used, is connected between the adjustment pin and ground. © 2002 Fairchild Semiconductor Corporation KA317 / LM317 Rev. 1.2.2 www.fairchildsemi.com 3 KA317 / LM317 — 3-Terminal Positive Adjustable Regulator Electrical Characteristics KA317 / LM317 — 3-Terminal Positive Adjustable Regulator ADJUSTMENT CURRENT (uA) OUTPUT VOLTAGE DEVIATION(%) Typical Performance Characteristics TEMPERATURE (°C) TEMPERATURE (°C) Figure 3. Adjustment Current REFERENCE VOLTAGE(V) INPUT-OUTPUT DIFFERENTIAL(V) Figure 2. Load Regulation TEMPERATURE (°C) TEMPERATURE (°C) Figure 4. Dropout Voltage Figure 5. Reference Voltage 3 ISC - SHORT CIRCUIT CURRENT (A) o TA = 25 C VOUT = 1.25 V, Shorthed to GND 2 1 0 0 5 10 15 20 25 30 35 40 VI-VO - INPUT OUTPUT VOLTAGE [V] Figure 6. Short Circuit vs. Input-Output Voltage © 2002 Fairchild Semiconductor Corporation KA317 / LM317 Rev. 1.2.2 www.fairchildsemi.com 4 VI KA317 / LM317 VO VADJ Input Ci 0.1 μF IADJ R2 adj R1 240 Ω Output Co 1 μF VO = 1.25 V (1 + R2 / R1) + IADJR2 Figure 7. Typical Application Note: 3. CI is required when the regulator is located an appreciable distance from power supply filter. CO is not needed for stability; however, it does improve transient response. Since IADJ is controlled to less than 100 μA, the error associated with this term is negligible in most applications. © 2002 Fairchild Semiconductor Corporation KA317 / LM317 Rev. 1.2.2 www.fairchildsemi.com 5 KA317 / LM317 — 3-Terminal Positive Adjustable Regulator Typical Application(3) KA317 / LM317 — 3-Terminal Positive Adjustable Regulator Physical Dimensions Figure 8. TO-220, MOLDED, 3LEAD, JEDEC VARIATION AB © 2002 Fairchild Semiconductor Corporation KA317 / LM317 Rev. 1.2.2 www.fairchildsemi.com 6 TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. 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