Features
10V to 36V Input Range
Fixed 5.05V Output Voltage
Ultra-High Efficiency
Integrated 12mΩ at V5V=5V N-Channel MOSFET
for Low Side
Integrated 24mΩ at V5V=5V N-Channel MOSFET
for High Side
Dual Channel Accurate Output Over Current
Protection
1.5% VOUT Accuracy
Programmable Switching Frequency
Integrated Boost Switch
Output Under Voltage Protection (Hiccup)
Output Short Circuit Protection
Over Temperature Protection (non-latch)
3ms Soft-Start
Output Line-drop Compensation
Fixed 5.1V, 10mA Linear Regulator
Applications
Car Charger
USB Power Supply
General Description
5426 is a synchronous DC/DC buck converter with
integrated 24mΩ N-channel high-side MOSFET and
12mΩ N-channel low-side MOSFET. It uses constant
on-time control scheme to handle wide input/output
voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining
a relatively constant switching frequency. The 5426
allows to directly step-down high-voltage input for the
highest possible efficiency. It provides dual channel
accurate output over current protection (OCP). When
the OCP detected, the buck converter is clamped a
constant output current until output under voltage protection (UVP) and restart after a hiccup time.
The built-in 5.1V LDO supports 10mA for internal circuit. The 5426 includes output line-drop compensation function to support accurate supply at the end of
the cable for a varied load range. The 5426 is available in QFN4X4-28 package.
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