General Description

The Micrel MIC26601 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. The MIC26601 operates over an input supply range of 4.5V to 28V and provides a regulated output of up to 6A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz.

Features

• Hyper Speed Control™ architecture enables

- High Delta V operation (VIN = 28V and VOUT = 0.8V)

- Small output capacitance

• 4.5V to 28V voltage input

• 6A output current capability, up to 95% efficiency

• Adjustable output from 0.8V to 5.5V

• ±1% feedback accuracy

• Any Capacitor™ stable - zero-to-high ESR

• 600kHz switching frequency

• No external compensation

• Power Good (PG) output

• Foldback current-limit and “hiccup mode” short-circuit protection

• Supports safe startup into a pre-biased load

• –40°C to +125°C junction temperature range

• 28-pin 5mm × 6mm MLF® package

Applications

• Distributed power systems

• Communications/networking infrastructure

• Set-top box, gateways, and routers

• Printers, scanners, graphic cards, and video cards