The RT6575 family is a dual-channel step-down controller designed to generate 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 RT6575 features 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 a 100ns response to load transients.For maximizing power efficiency, the RT6575 automatically switches to the diode-emulation mode in light load applications. To eliminate noise in audio applications, the RT6575C/RT6575D includes an audio-skipping mode, which maintains the switching frequency above 25kHz.The RT6575 is available in the WQFN-20L 3x3 package. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.
應用
- Notebook and Sub-Notebook Computers
- System Power Supplies
- 3-Cell and 4-Cell Li + Battery-Powered Devices