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RT9018B15GSP Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT9018B15GSP Datasheet(HTML) 2 Page - Richtek Technology Corporation |
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2 / 12 page  RT9018A/B 2 DS9018A/B-04 September 2007 www.richtek.com Function Block Diagram Typical Application Circuit Pin Description Pin No. Pin Name Pin Function PSOP-8 WDFN 3x3 3 7, 8, 9 VIN Supply Input Voltage. 2 6 EN Chip Enable (Active-High). 4 10 VDD Supply Voltage of Control Circuitry. 1 5 PGOOD Power Good Open Drain Output. 7 4 ADJ Set the output voltage by the internal feedback resistors when ADJ is grounded. If external feedback resistors is used, VOUT = 0.8V x (R1 + R2)/R 2. 6 1, 2, 3 VOUT Output Voltage. 5 -- NC No Internal Connection. 8, Exposed Pad (9) Exposed Pad (11) GN D Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. Figure 1. Fixed Voltage Regulator Figure 2. Adjustable Voltage Regulator R2 R2 R1 0.8 VOUT + × = VIN EN GND VOUT ADJ PGOOD RT9018A/B V OUT 10uF 10uF Chip Enable 100k V OUT VDD 1uF V DD V IN OCP Error Amplifier POR EN GND ADJ VIN PGOOD VOUT VDD Mode + - 0.8V 0.72V Driver OTP VIN EN GND VOUT ADJ PGOOD RT9018A/B V OUT 10uF 10uF Chip Enable R1 R2 100k V OUT VDD 1uF V DD V IN C Dummy |
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