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6 page 
LM317 3-TERMINAL ADJUSTABLE REGULATOR SLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION R1 1.2 k Ω R2 20 k Ω INPUT OUTPUT ADJUST LM317 VO VI Figure 6. 1.2-V to 20-V Regulator Circuit With Minimum Program Current INPUT OUTPUT ADJUST LM317 VO† VI INPUT OUTPUT ADJUST LM317 VO† VI INPUT OUTPUT ADJUST LM317 VO† VI R1 120 Ω R2 1 k Ω † Minimum load current from each output is 10 mA. All output voltages are within 200 mV of each other. Figure 7. Adjusting Multiple On-Card Regulators With a Single Control R1 240 Ω R2 2.4 k Ω INPUT OUTPUT ADJUST LM317 VI RS 0.2 Ω (see Note A) NOTE A: RS controls the output impedance of the charger. The use of RS allows for low charging rates with a fully charged battery. Z OUT + RS 1 ) R2 R1 Figure 8. Battery-Charger Circuit |
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