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 switching frequencies up to 250 kHz using a constant off-time current-mode architecture.
The constant off-time architecture maintains constant ripple current in the inductor, easing the design of wide input range converters. Current-mode operation provides excellent line and load transient response. The operating current level is user programmable via an external current sense resistor. The ADP1148 incorporates automatic Power Saving Sleep Mode operation when load currents drop below the level required for continuous operation. In sleep mode, standby power is reduced to only about 2 mW at VIN = 10 V. In shutdown, both MOSFETs are turned off.
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Notebook and Palmtop ComputersPortable InstrumentsBattery Operated Digital DevicesIndustrial Power DistributionAvionics SystemsTelecom Power SuppliesGPS SystemsCellular Telephones
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Operation From 3.5 V to 18 V Input VoltageUltrahigh Efficiency > 95%Low Shutdown CurrentCurrent Mode Operation for Excellent Line and Load Transient ResponseHigh Efficiency Maintained Over Wide Current RangeLogic Controlled Micropower ShutdownShort Circuit ProtectionVery Low Dropout OperationSynchronous FET Switching for High EfficiencyAdaptive Nonoverlap Gate Drives
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Input Supply Voltage (Pin 3) . . . . . . . . . . . . . 0.3 V to +20 V
Continuous Output Currents (Pins 1, 14) . . . . . . . . . . 50 mA
Sense Voltages (Pins 7, 8) . . . . . . . . . . . . . . . .0.3 V to VCC
Operating Temperature Range . . . . . . . . . . . . 0°C to +70°C
Extended Commercial Temperature Range . .40°C to +85°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature Range . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C
Post a Buying Lead
Required Field 
