DESCRIPTION
The LTC® 3445 contains a high efficiency monolithic synchronous current mode buck regulator, two LDO regulators, a PowerPath^TM controller and an I2C^TM interface.

FEATURES
Buck Regulator
■ High Efficiency: Up to 93%
■ 600mA Output Current (VCC1= 3V, VOUT= 1.3V)
■ Programmable Output Voltage: 0.85V to 1.55V
■ 2.5V to 5.5V Input Voltage Range
■ 1.5MHz Constant Frequency or Spread Spectrum Option
■ Soft-Start LDOs
■ Two LDO Regulators: 0.3V Dropout at 50mA PowerPath Controller
■ Dynamically Regulates VCC BATT I2C
■ Standard (100kHz) or Fast Mode (400kHz)
■ 24-Lead (4mm ×4mm) QFN Package

APPLICATIONS
■ Intel’s Microprocessor Supply (PXA27X)
■ Portable Instruments