Description

PM6685 is a dual step-down controller specifically designed to provide extremely high efficiency conversion with loss-less current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation.

Features

■ 6V to 28V input voltage range

■ Fixed 5V - 3.3V output voltages

■ 5V and 3.3V voltage always available to deliver 100mA of peak current

■ 1.237V ±1 reference voltage available

■ Lossless current sensing using low side

■ MOSFETs RDS(on)

■ Negative current limit

■ Soft-start internally fixed at 2ms

■ Soft output discharge

■ Latched OVP and UVP

■ Selectable pulse skipping at light loads

■ Selectable minimum frequency (33kHz) in pulse skip mode

■ 4mW maximum quiescent power

■ Independent power good signals

■ Output voltage ripple compensation

Applications

■ Notebook computers

■ Tablet PC or slates

■ Mobile system power supply

■ 3 and -4 Cells Li+ battery-powered devices