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LM317L Folha de dados(PDF) 4 Page - Texas Instruments |
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LM317L Folha de dados(HTML) 4 Page - Texas Instruments |
4 / 12 page LM317L 3TERMINAL ADJUSTABLE REGULATOR SLCS144 − JULY 2004 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION Figure 1. Adjustable Voltage Regulator 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 Figure 2. 0-V to 30-V Regulator Circuit 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 Figure 3. Regulator Circuit With Improved Ripple Rejection 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 Figure 4. Precision Current-Limiter Circuit VI R1 Adjustment Output Input LM317L I limit + 1.25 R1 |
Nº de peça semelhante - LM317L |
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Descrição semelhante - LM317L |
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