Richtek RT6576DGQW(2)

降压同步（2），线性（LDO）（2）4Adjustable, Adjustable, Fixed, 2V ~ 5.5V5V ~ 25V

Overview

The RT6576C/D 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 100mA output current and 3.3V linear regulator provides 1% accuracy under 35mA. The RT6576C/D has an oscillator output to drive the external charge pump application. Other features include on-board 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 RT6576C/D automatically switches to the diode-emulation mode in light load applications. To eliminate noise in audio applications, an audio-skipping mode is included, which maintains the switching frequency above 25kHz. The RT6576C/D is available in the WQFN-20L 3x3 package.

Features

Tape & Reel (TR) Package
4 Number of Outputs
300kHz, 355kHz Frequency - Switching
Adjustable, Adjustable, Fixed, 2V ~ 5.5V Voltage/Current - Output 1
Adjustable, Adjustable, Fixed, 2V ~ 4V Voltage/Current - Output 2
Adjustable, Adjustable, Fixed, 3.3V, 100mA Voltage/Current - Output 3
No w/LED Driver
No w/Supervisor
Yes w/Sequencer
5V ~ 25V Voltage - Supply
Surface Mount Mounting Type