General Description

The MCP1602 is a high efficient, fully integrated 500 mA synchronous buck regulator with a powergood monitor. The 2.7V to 5.5V input voltage range and low quiescent current (45 µA, typical) makes the MCP1602 ideally suited for applications powered from 1-cell Li-Ion or 2-cell/3-cell NiMH/NiCd batteries.

Features

• Over 90 Typical Efficiency

• Output Current: Up To 500 mA

• Power-Good Output with 262 ms Delay

• Low Quiescent Current: 45 µA (typical)

• Low Shutdown Current: 0.05 µA (typical)

• Automatic PWM to PFM Mode Transition

• Adjustable Output Voltage:

- 0.8V to 4.5V

• Fixed Output Voltage:

- 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V

• 2.0 MHz Fixed-Frequency PWM (Heavy Load)

• Internally Compensated

• Undervoltage Lockout (UVLO)

• Overtemperture Protection

• Overcurrent Protection

• Space Saving Packages:

- 8-Lead MSOP

- 8-Lead 3x3 DFN

Applications

• Cellular Telephones

• Portable Computers

• Organizers / PDAs

• USB Powered Devices

• Digital Cameras

• Portable Equipment

• +5V or +3.3V Distributed Systems