Analog Devices ADP1148
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 complementary power MOSFETs at O switching frequencies up to 250 kHz using a constant off-time current-mode architecture. The operating current level is user programmable via an external current sense resistor.| Part No. | ADP1148 |
|---|---|
| Datasheet | ADP1148 Download |
| Manufacturer |  Analog Devices |
| Description | Step-Down Switching Regulators |
| Buy | Stock & Price |
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(–) 3 1 14 12 11 8 9 7 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 EAPPLICATIONS
Notebook and Palmtop Computers Portable Instruments Battery Operated Digital Devices T Industrial Power Distribution Avionics Systems Telecom Power Supplies GPS Systems E Cellular TelephonesGENERAL DESCRIPTION
L SLEEP S VTH2 4 CT DRIVE 1 QR S VTH1 T OFF-TIME CONTROL 2 R QS C 10mV to 150mV VIN SENSE(–) VFB 6 ITH V B 13k⍀ G 1.25V 100k⍀ REFERENCE 10 SHUTDOWN 5 INT VCC The constant off-time architecture maintains constant ripple current in the inductor, easing the design of wide input range converters.
