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