LP3875-ADJ 1.5A Fast Ultra Low Dropout Linear Regulators
July 2005
LP3875-ADJ
1.5A Fast Ultra Low Dropout Linear Regulators
General Description
The LP3875-ADJ fast ultra low-dropout linear regulators op-
erate from a +2.5V to +7.0V input supply. These ultra low
dropout linear regulators respond very quickly to step
changes in load, which makes them suitable for low voltage
microprocessor applications. The LP3875-ADJ is developed
on a CMOS process which allows low quiescent current
operation independent of output load current. This CMOS
process also allows the LP3875-ADJ to operate under ex-
tremely low dropout conditions.
Dropout Voltage:
Ultra low dropout voltage; typically 38mV
at 150mA load current and 380mV at 1.5A load current.
Ground Pin Current:
Typically 6mA at 1.5A load current.
Shutdown Mode:
Typically 10nA quiescent current when
the shutdown pin is pulled low.
Adjustable Output Voltage:
The output voltage may be
programmed via two external resistors.
Features
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Ultra low dropout voltage
Low ground pin current
Load regulation of 0.06%
10nA quiescent current in shutdown mode
Guaranteed output current of 1.5A DC
Available in TO-263, TO-220 and SOT-223 packages
Minimum output capacitor requirements
Overtemperature/overcurrent protection
鈭?0藲C to +125藲C junction temperature range
Applications
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Microprocessor power supplies
GTL, GTL+, BTL, and SSTL bus terminators
Power supplies for DSPs
SCSI terminator
Post regulators
High efficiency linear regulators
Battery chargers
Other battery powered applications
Typical Application Circuit
20074645
*See Application Hints
漏 2005 National Semiconductor Corporation
DS200746
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