LP38843
www.ti.com SNVS290C – DECEMBER 2004 – REVISED APRIL 2013 LP38843 3A Ultra Low Dropout Linear Regulators
Stable with Ceramic Output Capacitors
Check for Samples: LP38843 FEATURES DESCRIPTION The LP38843 is a high-current, fast-response
regulator which can maintain output voltage
regulation with minimum 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 N-MOS power transistor, while
Vin is the input voltage which supplies power to the
load. The use of an external bias rail allows the part
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 N-MOS power transistor
results in wide bandwidth, yet minimum external
capacitance is required to maintain loop stability. 1 2 Ideal for Conversion From 1.8V or 1.5V Inputs
Designed for use with low ESR Ceramic
Capacitors
0.8V, 1.2V and 1.5V Standard Voltages
Available
Ultra Low Dropout Voltage (210mV at 3A typ)
1.5% Initial Output Accuracy …
