Transcription of Dual-Channel Synchronous DC/DC Step-Down Controller with ...
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RT8249A/B/C DS8249A/B/C-02 June 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Simplified Application CircuitGeneral DescriptionThe RT8249A/B/C is a Dual-Channel Step-Down , controllergenerating supply voltages for battery-powered includes two Pulse-Width Modulation (PWM) controllersadjustable from 2V to , and two fixed 5 linearregulators. Each linear regulator provides up to 100mAoutput current and linear regulator provides 1%accuracy under 35mA. The RT8249A/B has an oscillatoroutput to driver the external charge pump application. TheRT8249C provides a mode selection pin, SKIPSEL, toselect Diode-Emulation Mode (DEM) or Audio SkippingMode (ASM).
Low-Side Gate Driver Output for Channel 2. LGATE2 swings between GND and LDO5. 12 VIN Power Input for 5V and 3.3V LDO Regulators and Buck Controllers. 13 LDO5 5V Linear Regulator Output. LDO5 is also the supply voltage for the low-side MOSFET and analog supply voltage for the device. 14 BYP1 Switch-over Source Voltage Input for LDO5. 15 LGATE1
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