General Description

The Micrel MIC2164/-2/-3/C are constant-frequency, synchronous buck controllers featuring adaptive on-time control. The MIC2164/-2/-3/C are the first products in the new Hyper Speed Control™ family of buck controllers introduced by Micrel.

Features

• Hyper Speed Control™ architecture enables

- High delta V operation (VHSD = 28V and VOUT = 0.8V)

- Smaller output capacitors than competitors

• 3V to 28V input voltage

• Any CapacitorTM stable

- Zero ESR to high ESR

• 25A output current capability

• 300kHz/600kHz/1MHz switching frequency

• Adaptive on-time mode control

• Adjustable output from 0.8V to 5.5V with ±1 (MIC2164/-2/-3) or ±3 (MIC2164C) FB accuracy

• Up to 95 efficiency

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

• 6ms Internal soft start

• Thermal shutdown

• Safe start-up into pre-biased loads

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

• Available in 10-pin MSOP package

Applications

• Set-top box, gateways and routers

• Printers, scanners, graphic cards and video cards

• Telecommunication, PCs and servers