NCP1578 Synchronous Step-Down Controller with 50 mA
Linear Regulator
The 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