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RT8008-25QJ5 Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT8008-25QJ5 Datasheet(HTML) 2 Page - Richtek Technology Corporation |
2 / 14 page RT8008 2 DS8008-04 March 2007 www.richtek.com Layout note: 1. The distance that CIN connects to VIN is as close as possible (Under 2mm). 2. COUT should be placed near RT8008. Typical Application Circuit Figure 1. Fixed Voltage Regulator Figure 2. Adjustable Voltage Regulator 4.7uF 10uF VIN LX GND RT8008 EN VOUT 2.2uH 2.2V to 5.5V V IN V OUT C IN L 5 3 4 1 2 C OUT + = R2 R1 1 x V V REF OUT 4.7uF 10uF VIN LX GND RT8008 EN FB 2.2uH 2.2V to 5.5V V IN V OUT C IN L 5 3 4 1 2 C OUT R1 R2 C1 I R2 with R2 = 300k Ω to 60kΩ so the IR2 = 2µA to 10µA, and (R1 x C1) should be in the range between 3x10 -6 and 6x10-6 for component selection. Layout Guide Figure 3 EN GND LX VOUT 2 3 5 4 1 VIN GND V IN V OUT C OUT C IN GND L EN GND LX FB 2 3 5 4 1 VIN GND V IN V OUT C OUT C IN GND C1 R1 R2 L V OUT |
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