General Description

The MIC2168A is a high-effi ciency, simple to use 1MHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2168A allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2168A operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N-Channel MOSFET drive scheme allows effi ciencies over 95% across a wide load range.

Features

• 3V to 14.5V input voltage range

• Adjustable output voltage down to 0.8V

• Up to 95% effi ciency

• 1MHz PWM operation

• Adjustable current-limit senses high-side N-Channel MOSFET current

• No external current sense resistor

• Adaptive gate drive increases effi ciency

• Ultra-fast response with hysteretic transient recovery mode

• Overvoltage protection protects the load in fault conditions

• Dual mode current limit speeds up recovery time

• Hiccup mode short-circuit protection

• Internal soft-start

• Dual function COMP and EN pin allows low-power shutdown

• Small size MSOP 10-lead package

Applications

• Point-of-load DC/DC conversion

• Set-top boxes

• Graphic cards

• LCD power supplies

• Telecom power supplies

• Networking power supplies

• Cable modems and routers