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Lm317
1.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 1 July 2013 KA317 / LM317 3-Terminal Positive Adjustable Regulator Features • 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 Ordering Information Block Diagram Figure 1. Block Diagram 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 Rlimit 3Vin Vo 1 Voltage Reference Vadj 2 Protection Circuitry + - Input Output AdjVADJ RLIMIT Description This monolithic integrated circuit is an adjustable 3-termi- nal positive-voltage regulator designed to supply more than 1.5 A of load current with an output voltage adjust- able over a 1.2 V to 37 V range. It employs internal cur- rent limiting, thermal shutdown, and safe area compensation. TO-220 1. Adj 2. Output 3. Input 1 Output
2.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 2 Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera- ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi- tion, 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. Thermal Characteristics Symbol Parameter Value Unit VI - VO Input-Output Voltage Differential 40 V TLEAD Lead Temperature 230 °C TJ Operating Junction Temperature Range 0 to +125 °C TSTG Storage Temperature Range -65 to +125 °C ΔVO/ΔT Temperature Coefficient of Output Voltage ±0.02 %/°C Symbol Parameter Value Units PD Power Dissipation Internally Limited W RθJA Thermal Resistance, Junction to Ambient 80 °C/W RθJC Thermal Resistance, Junction to Case 5 °C/W
3.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 3 Electrical Characteristics VI-VO = 5 V, IO = 0.5 A, 0°C ≤ TJ ≤ +125°C, IMAX = 1.5 A, PDMAX = 20 W, unless otherwise specified. 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. Symbol Parameter Conditions Min. Typ. Max. Unit RLINE Line Regulation(1) TA = +25°C, 3 V ≤ VI - VO ≤ 40 V 0.01 0.04 %/ V 3 V ≤ VI - VO ≤ 40 V 0.02 0.07 %/ V RLOAD Load Regulation(1) TA = +25°C, 10mA ≤ IO ≤ IMAX VO < 5 V 18 25 mV VO ≥ 5 V 0.4 0.5 %/VO 10 mA ≤ IO ≤ IMAX VO < 5 V 40 70 mV VO ≥ 5 V 0.8 1.5 %/VO IADJ Adjustable Pin Current 46 100 μA ΔIADJ Adjustable Pin Current Change 3 V ≤ VI - VO ≤ 40 V, 10 mA ≤ IO ≤ IMAX, PD ≤ PMAX 2.0 5.0 μA VREF Reference Voltage 3 V ≤ VIN - VO ≤ 40 V, 10 mA ≤ IO ≤ IMAX, PD ≤ PMAX 1.20 1.25 1.30 V STT Temperature Stability 0.7 %/VO IL(MIN) Minimum Load Current to Maintain Regulation VI - VO = 40 V 3.5 12.0 mA IO(MAX) Maximum Output Current TA = 25°C VI - VO ≤ 15 V, PD ≤ PMAX 1.5 2.2 A VI - VO ≤ 40 V, PD ≤ PMAX 0.3 A eN RMS Noise,% of VOUT TA = +25°C, 10 Hz ≤ f ≤ 10 kHz 0.003 0.010 %/VO RR Ripple Rejection VO = 10 V, f = 120 Hz without CADJ 60 dB CADJ = 10 μF(2) 66 75 dB ST Long-Term Stability, TJ = THIGH TA = +25°C for End Point Measurements, 1000 HR 0.3 1.0 %
4.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 4 Typical Performance Characteristics Figure 2. Load Regulation Figure 3. Adjustment Current Figure 4. Dropout Voltage Figure 5. Reference Voltage Figure 6. Short Circuit vs. Input-Output Voltage TEMPERATURE (°C) OUTPUTVOLTAGEDEVIATION(%) TEMPERATURE (°C) ADJUSTMENTCURRENT(uA) TEMPERATURE (°C) INPUT-OUTPUTDIFFERENTIAL(V) TEMPERATURE (°C) REFERENCEVOLTAGE(V) 0 5 10 15 20 25 30 35 40 0 1 2 3 ISC -SHORTCIRCUITCURRENT(A) VI -VO - INPUT OUTPUT VOLTAGE [V] TA = 25 o C VOUT = 1.25 V, Shorthed to GND
5.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 5 Typical Application(3) 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. VI VO VADJ OutputInput R2 Co 1 μF Ci 0.1 μF adj IADJ VO = 1.25 V (1 + R2 / R1) + IADJR2 R1 240 Ω KA317 / LM317
6.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 6 Physical Dimensions Figure 8. TO-220, MOLDED, 3-LEAD, JEDEC, VARIATION AB Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/TO/TO220B03.pdf. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/packing_dwg/PKG-TO220B03.pdf. TO-220 [ SINGLE GAUGE ]
7.
KA317/LM317—3-TerminalPositiveAdjustableRegulator © 2002 Fairchild
Semiconductor Corporation www.fairchildsemi.com KA317 / LM317 Rev. 1.2.1 7 Physical Dimensions (continued) Figure 9. TO220, MOLDED, 3-LEAD, NON-JEDEC, VARIATION AB Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/dwg/TO/TO220Y03.pdf. For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area: http://www.fairchildsemi.com/packing_dwg/PKG-TO220Y03.pdf. TO-220 [ DUAL GAUGE ]
8.
© Fairchild Semiconductor
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