U U
LTC3445
I2C Controllable Buck
Regulator with Two LDOs
in a 4mm × 4mm QFN
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
U APPLICATIO S
■ Intel’s Microprocessor Supply (PXA27X) ■ Portable Instruments
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark o...