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RT8239 Datasheet(PDF) 6 Page - Richtek Technology Corporation |
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RT8239 Datasheet(HTML) 6 Page - Richtek Technology Corporation |
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6 / 24 page  RT8239A/B/C 6 DS8239A/B/C-06 October 2012 www.richtek.com © Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Function Block Diagram Pin No. Pin Name Pin Function 18 UGATE1 Upper Gate Driver Output for SMPS1. UGATE1 swings between PHASE1 and BOOT1. 19 BOOT1 Boost Flying Capacitor Connection for SMPS1. Connect to an external capacitor according to the typical application circuits. 20 BYP1 Switch Over Source Voltage Input for LDO5. 21 (Exposed Pad) GND Analog Ground and Power Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. ENM (RT8239A) SECFB (RT8239B/C) SMPS2 PWM Buck Controller BOOT2 UGATE2 PHASE2 LGATE2 GND LDO5 FB2 ENTRIP2 PGOOD SMPS1 PWM Buck Controller BOOT1 UGATE1 PHASE1 LGATE1 LDO5 FB1 ENTRIP1 LDO5 REF Switch Over Threshold VIN LDO5 On Time TON LDO3 LDO3 BYP1 Power-On Sequence Clear Fault Latch ENLDO LDO5 10µA LDO5 10µA |
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