RT6585C Datasheet | Richtek

Description The RT6585C is a dual-channel step-down, controller generating supply voltages for battery-powered systems. It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/3.3V linear regulators. Each linear regulator provides up to 100m A output current and 3.3V linear regulator provides 1% accuracy under 35m A. The RT6585C provides a mode selection pin, SKIPSEL, to select Diode-Emulation Mode (DEM) or Audio Skipping Mode (ASM). Other features include onboard power-up sequencing, a power-good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown. A constant current ripple PWM control scheme operates without sense resistors and provides 100ns response to load transient. For maximizing power efficiency, the RT6585C automatically switches to the diode-emulation mode in light load applications. The RT6585C is available in the WQFN-20L 3x3 package. The remended junction temperature range is - 40C to 125C. 2 Ordering Information Package Type(1) QW: WQFN-20L 3x3 (W-Type) Lead Plating System G: Richtek Green Policy pliant(2) Note 1. - Marked with (1) indicated: patible with the current requirements of IPC/JEDEC J-STD-020. - Marked with (2) indicated: Richtek products are Richtek Green Policy pliant. 3 Features - Support Connected Standby Mode for Ultrabook - CCRCOT Control with 100ns Load Step Response - PWM Maximum Duty Ratio > 98% - 5V to 25V Input Voltage Range - Dual Adjustable Output: - CH1: 2V to 5.5V - CH2: 2V to 4V - 5V/3.3V LDOs with 100m A Output Current - 1% Accuracy on 3.3V LDO Output - Internal Frequency Setting - 500k Hz/600k Hz (CH1/CH2) - Internal Soft-Start and Soft-Discharge - 4700ppm/o C RDS(ON) Current Sensing - Independent Switcher Enable Control - Built in OVP/UVP/OCP/OTP - Non-latch UVLO - Power-Good Indicator - 20-Lead WQFN Package 4 Applications - Notebook and Sub-Notebook puters - System Power Supplies - 3-Cell and 4-Cell Li+ Battery-Powered...