General Description

The MIC2169A is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2169A allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2169A 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 efficiencies 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 efficiency

• 500kHz PWM operation

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

• No external current-sense resistor

• Adaptive gate drive increases efficiency

• 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