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LM317S/NOPB Datasheet(PDF) 19 Page - Texas Instruments |
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LM317S/NOPB Datasheet(HTML) 19 Page - Texas Instruments |
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19 / 48 page  three LM195 devices in parallel LM117 LM117, LM317-N www.ti.com SNVS774P – MAY 2004 – REVISED OCTOBER 2015 Typical Applications (continued) 9.2.6 High-Current Adjustable Regulator Using the LM195 power transistor in parallel with the LM117 can increase the maximum possible output load current (see Figure 24). Sense resistor R1 provides the 0.6 V across base to emitter to turn on the PNP. This on switch allows current to flow, and the voltage drop across R3 drives three LM195 power transistors designed to carry an excess of 1 A each. NOTE The selection of R1 determines a minimum load current for the PNP to turn on. The higher the resistor value, the lower the load current must be before the transistors turn on. NOTE: ‡Optional—improves ripple rejection †Solid tantalum *Minimum load current = 30 mA Figure 24. High-Current Adjustable Regulator Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 19 Product Folder Links: LM117 LM317-N |
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