General Description

The RT5797B is a high efficiency synchronous stepdown

DC-DC converter. Its input voltage range is from

2.7V to 6V and provides an adjustable regulated output

voltage from 0.6V to 3.4V while delivering up to 3A of

output current.

The internal synchronous low on-resistance power

switches increase efficiency and eliminate the need for

an external Schottky diode. The Current Mode

Constant-On-time (CMCOT) operation with internal

compensation allows the transient response to be

optimized over a wide range of loads and output

capacitors. The RT5797B is available in the WDFN-8L

2x2 package.

Features

⚫ Efficiency Up to 95

⚫ RDSON 100m HS / 70m LS

⚫ VIN Range 2.7V to 6V

⚫ VREF 0.6V with 1 Accuracy at 25C

⚫ CMCOT™ Control Loop Design for Best

Transient Response, Robust Loop Stability with

Low-ESR (MLCC) COUT

⚫ Soft-Start 1.2ms

Applications

⚫ STB, Cable Modem, & xDSL Platforms

⚫ LCD TV Power Supply & Metering Platforms

⚫ General Purpose Point of Load (POL)