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Documents LP38859
SNVS337F – JUNE 2006 – REVISED SEPTEMBER 2015 LP38859 3-A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start
1 Features 3 Description The LP38859 is a high-current, fast-response
regulator which 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 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 NMOS power transistor results in wide bandwidth, yet
minimum external capacitance is required to maintain
loop stability. 1 Input Voltage: 1.1 V to 5.5 V
Wide VBIAS Supply Operating Range: 3 V to 5.5 V
Standard VOUT Values: 0.8 V and 1.2 V …
