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LM317LCPK Datasheet(PDF) 4 Page - Texas Instruments |
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LM317LCPK Datasheet(HTML) 4 Page - Texas Instruments |
4 / 17 page VO (see Note A) R2 = 3 k Ω 1N4002 R3 = 820 Ω −10 V C1 = 0.1 µF 35 V Adjustment Output Input LM317L NOTE A: Output voltage is calculated from the equation: where: Vref equals the difference between OUTPUT and ADJUSTMENT voltages ( ≈1.25 V). R1 = 120 Ω V O + Vref 1 ) R2 ) R3 R1 * 10 V C1 = 0.1 µF (see Note A) VI 470 Ω R1 R2 C2 = 1 µF (see Note C) VO (see Note B) Adjustment Output Input LM317L NOTES: A. Use of an input bypass capacitor is recommended if regulator is far from the filter capacitors. B. Output voltage is calculated from the equation: where: Vref equals the difference between OUTPUT and ADJUSTMENT voltages ( ≈1.25 V). C. Use of an output capacitor improves transient response, but is optional. V O + Vref 1 ) R2 R1 VI R1 Adjustment Output Input LM317L I limit + 1.25 R1 R1 = 470 Ω D1† 1N4002 C3 = 1 µF C2 = 10 µF R2 = 10 k Ω VI + + − − Adjustment Output Input LM317L † D1 discharges C2 if output is shorted to ground. NOTE A: Use of an output capacitor improves transient response, but is optional. VO (see Note A) C1 = 0.1 µF R3 = 240 Ω VI C1 = 0.1 µF C2 = 1 µF Output Adjust VO R2 = 1.5 k Ω R1 = 470 Ω LM317L R4 = 2 k Ω Adjustment Output Input LM317L Adjustment Output Input R1 = 470 Ω R2 = 5.1 k Ω C1 = 25 µF 2N2905 R3 = 50 k Ω 1N4002 VO = 15 V VI LM317L Adjustment Output Input LM317L SLCS144D – JULY 2004 – REVISED OCTOBER 2011 www.ti.com APPLICATION INFORMATION Figure 1. Adjustable Voltage Regulator Figure 2. 0-V to 30-V Regulator Circuit Figure 3. Regulator Circuit With Improved Ripple Figure 4. Precision Current-Limiter Circuit Rejection Figure 5. Tracking Preregulator Circuit Figure 6. Slow-Turnon 15-V Regulator Circuit 4 Submit Documentation Feedback Copyright © 2004–2011, Texas Instruments Incorporated Product Folder Link(s): LM317L |
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