Datasheet Texas Instruments LP3891ES-1.2/NOPB — 数据表

LP3891
www.ti.com SNVS235D – SEPTEMBER 2003 – REVISED APRIL 2013 LP3891 0.8A Fast-Response Ultra Low Dropout Linear Regulators
Check for Samples: LP3891 FEATURES DESCRIPTION The LP3891 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 Ultra Low Dropout Voltage (100mV at 0.8A typ)
Low Ground Pin Current
Load Regulation of 0.04%/A
60 nA Typical Quiescent Current in Shutdown
1.5% Output Accuracy (25В°C)
TO-220, DDPAK/TO-263 and SO PowerPAD-8
Packages
Over Temperature/Over Current Protection …