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NCP1578
NCP1578 Synchronous Step-Down Controller with 50 mA Linear Regulator
NCP1578
Synchronous Step-Down
Controller with 50 mA
Linear RegulatorThe NCP1578 is a voltage mode synchronous step-down controller
for high performance systems intended to be used in battery-powered
systems. The NCP1578 includes a high efficiency PWM controller
with adjustable output, and a 5 V/50 mA linear regulator. A pin is
provided to enable or disable forced PWM mode of operation. An
internal power good voltage monitor tracks the SMPS output.
NCP1578 also features soft-start sequence, UVLO for linear regulator
and switcher, overvoltage protection, overcurrent protection, and
thermal shutdown. The IC is packaged in QFN20.
Features•�Fixed 5.0 V/50 mA Internal Linear Regulator
•�Adjustable PWM Output Voltage
•�1.5% Accuracy 0.8 V Reference
•�4.5 V to 24 V Battery/Adaptor Voltage Range
•�Selectable Force PWM Mode
•�Lossless, Programmable High Side MOSFET's RDS(ON) Current
Sensing
•�Soft-start and Power-Up Sequencing
•�Overvoltage Protection, Undervoltage Protection
•�Programmable Delay Power Good Output
•�Thermal Shutdown
•�Housed in QFN20
•�This is a Pb-Free Device
Typical Applications•�Network HUB, Switchers and Routers
•�3-Cell and 4-Cell Li-ion Battery-Powered Devices
•�Personal Computer Peripherals
•�Microprocessors Power Supply
•�Embedded Controller
•�DSP and Core Processor
•�Supply for LCD Display
