LTC3447 Datasheet PDF - Linear Technology

DESCRIPTION
The LTC®3447 is a high effi ciency monolithic synchronous current mode buck regulator. Using an I2C interface, the output voltage can be set between 0.69V and 2.05V using an internal 6-bit DAC.

FEATURES
â–  I2C Programmable Output with 21.6mV Resolution
â–  Overtemperature Protected
â–  High Effi ciency: Up to 93%
■ Very Low Quiescent Current: Only 33µA
â–  600mA Output Current at VIN = 3V
â–  2.5V to 5.5V Input Voltage Range
â–  1MHz Constant Frequency Operation
â–  No Schottky Diode Required
â–  Low Dropout Operation: 100% Duty Cycle
â–  Stable with Ceramic Capacitors
■ Shutdown Mode Draws <1µA Supply Current
■ ±2% Output Voltage Accuracy
â–  Standard (100kHz) or Fast Mode (400kHz) I2C
â–  6-Bit Voltage DAC (0.69V to 2.05V)
â–  Disable Burst Mode Operation
â–  Enable Power Good Blanking
â–  Optional External Start-Up Resistors
â–  Soft-Start
■ 10 Lead, 3mm × 3mm DFN Package

APPLICATIONS
â–  Distributed Power Supplies
â–  Notebook Computers
â–  PDAs and Other Handheld Devices