ADP1148-3.3
ADP1148-3.3 is Step-Down Switching Regulators manufactured by Analog Devices.
- Part of the ADP1148 comparator family.
- Part of the ADP1148 comparator family.
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Operation From 3.5 V to 18 V Input Voltage
Ultrahigh Efficiency > 95%
ADJUSTABLE
Low Shutdown Current Current Mode Operation for Excellent Line and Load
PWR SIGNAL
VERSION
VIN P-DRIVE N-DRIVE GND GND SENSE(+) VFB SENSE(- )
Transient Response
ADP1148
High Efficiency Maintained Over Wide Current Range
NON-OVERLAP
Logic Controlled Micropower Shutdown Short Circuit Protection Very Low Dropout Operation Synchronous FET Switching for High Efficiency Adaptive Nonoverlap Gate Drives
E APPLICATIONS
Notebook and Palmtop puters Portable Instruments Battery Operated Digital Devices
T Industrial Power Distribution
Avionics Systems Tele Power Supplies GPS Systems
E Cellular Telephones
GENERAL DESCRIPTION
L The ADP1148 is part of a family of synchronous step-down switching regulator controllers featuring automatic sleep mode to maintain high efficiencies at low output currents. These devices drive external plementary power MOSFETs at
O switching frequencies up to 250 k Hz using a constant off-time current-mode architecture.
SLEEP
S VTH2
4 CT
DRIVE
1 QR
S VTH1
OFF-TIME CONTROL
2...
