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
■ 6 V to 28 V input voltage range
■ Fixed 5 V - 3.3 V output voltages
■ 5 V and 3.3 V voltage always available to deliver 100 mA of peak current
■ 1.230 V ±1% reference voltage available
■ Lossless current sensing using low side
■ MOSFETs RDS(on)
■ Negative current limit
■ Soft-start internally fixed at 2 ms
■ Soft output discharge
■ Latched OVP and UVP
■ Selectable pulse skipping at light loads
■ Selectable minimum frequency (33 kHz) in pulse skip mode
■ 4 mW 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