GENERAL DESCRIPTION

The ADP3020 is a highly efficient dual synchronous buck switching regulator controller optimized for converting the battery or adapter input into the system supply voltages required in notebook computers. The ADP3020 uses a dual-mode PWM/Power Saving Mode architecture to maintain efficiency over a wide load range. The oscillator frequency can be programmed for 200 kHz, 300 kHz, or 400 kHz operation, or it can be synchronized to an external clock signal of up to 600 kHz.

FEATURES

Wide Input Voltage Range: 4.5 V to 25 V

High Conversion Efficiency > 96

Integrated Current Sense—No External Resistor Required

Low Shutdown Current: 7 μA (Typical)

Dual Synchronous Buck Controllers with Selectable

PWM/Power-Saving Mode Operation

Built-In Gate Drive Boost Circuit for Driving External

N-Channel MOSFETs

Two Independently Programmable Output Voltages

Fixed 3.3 V or Adjustable (1.25 V to VIN–0.5 V)

Fixed 5 V or Adjustable (1.25 V to VIN–0.5 V)

Programmable PWM Frequency

Integrated Linear Regulator Controller

Extensive Circuit Protection Functions

38-Lead TSSOP Package

APPLICATIONS

Notebook Computers and PDAs

Portable Instruments

General Purpose DC-DC Converters