The LP38853 is a high-current, fast-response regulator that can maintain output voltage
regulation with extremely low input-to-output voltage drop. Fabricated on a CMOS process, the
device operates from two input voltages: VBIAS provides voltage to drive the
gate of the NMOS power transistor; VIN is the input voltage which supplies
power to the load. The use of an external bias rail allows the device to operate from ultra-low
VIN voltages. Unlike bipolar regulators, the CMOS architecture consumes
extremely low quiescent current at any output load current. The use of an NMOS power transistor
results in wide bandwidth, yet minimum external capacitance is required to maintain loop
The fast transient response of this device makes it suitable for use in powering DSP and
microcontroller core voltages, and switch-mode power-supply post regulators.
Dropout Voltage: 240 mV (typical) at 3-A load current
Low Ground Pin Current: 10 mA (typical) at 3-A load
currentSoft Start: Programmable soft-start
For all available packages, see the orderable addendum at the
end of the data sheet.
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