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RT9901 Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT9901 Datasheet(HTML) 2 Page - Richtek Technology Corporation |
2 / 19 page RT9901 Preliminary 2 DS9901-12 August 2007 www.richtek.com Typical Application Circuit Figure 1. Typical Application Circuit from 1-cell Li+ Battery 1-cell Li+ Battery 3.4V to 4.2V VDD3 ENM CX FB3 CPFB EN1 LX3 COMP1 SS EN3 EN2 COMP2 COMP3 LX2 VDD2 LBI LBO FB1 VDD1 LX1 FB2 4.7 μH IGBT Driver 5V/50mA 14 20k 30k 4.7nF 1nF 1nF 4.7 μH 3.3V/500mA Low Battery Warning Output (Open Drain) 2 3 32 1 30 15 13 5 64 23 24 21 22 28 27 29 25 26 8 10 20 12 11 17 18 19 9 RT9901 VDDC 22nF 1nF 680k 130k 10 μF x 2 16 7, 31, Exposed Pad (33) 680k 470k 100pF 150k 10 μF x 4 10 μF 30k 1nF 100pF 200k 220k 4.7μH 1.5V/500mA VBAT VBAT 10 μF x 4 10 μF x 4 10 μF 0.1 μF VBAT 10 μF x 2 10 μF x 2 SS0520 SS0520 SS0520 10 μF 130k 100pF Chip Enable R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 C1 to C2 C3 C4 C5 C6 C7 to C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 to C20 C21 to C24 C23 C25 to C26 D1 D2 D3 L1 L2 L3 C27 to C30 VBAT RT9701CB VIN EN VOUT VOUT GND 5V/500mA 10uF Chip Enable 1 2 3 4 5 1 μF |
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