FEATURES
n High Efficiency: Up to 95% n 1.
8V at 800mA/1.
575V at 400mA n Very Low Quiescent Current: Only 40μA n 2.
25MHz Constant-Frequency Operation n High Switch Current: 1.
2A and 0.
7A n No
Schottky Diodes Required n VIN: 2.
5V to 5.
5V n Current Mode Operation for Excellent Line
and Load Transient Response n Short-Circuit Protected n Low Dropout Operation: 100% Duty Cycle n Ultralow Shutdown Current: IQ 1μA n Small Thermally Enhanced 3mm × 3mm
DFN Packages
APPLICATIONS
n PDAs/Palmtop PCs n Digital Cameras n Cellular Phones n Portable Media Players n PC Cards n Wireless and DSL Modems
LTC3548-1
Dual Synchronous, Fixed Output 2.
25MHz Step-Down
DC/DC
Regulator
DESCRIPTION
The LTC®3548-1 is a ...