LP38513 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – 3A Fast Response Ultra Low Dropout Linear Regulator

July 2007
LP38513
3A Fast Response Ultra Low Dropout Linear Regulator
General Description
The LP38513 fast response ultra low dropout linear regulator
operates from a +2.25V to +5.50V input supply. This ultra low
dropout linear regulator responds very quickly to step
changes in line or load conditions, which makes it suitable for
low voltage microprocessor applications. Developed on a
CMOS process, with a PMOS pass transistor, the LP38513
has low quiescent current operation that is independent of the
output load current.
Ground Pin Current: Typically 12 mA at 3A load current.
Disable Mode: Typically 60 µA quiescent current when the
Enable pin is pulled low.
ERROR Flag: The ERROR Flag goes low if V_OUT falls more
than typically 15% below the nominal value.
Precision Output Voltage: A guaranteed V_OUT accuracy of
±2.6% with T_J from 0°C to 125°C.
Features
■ ^{Conversions from 2.5V rail to 1.8V}
■ ^{Stable with ceramic capacitors}
■ ^{Low ground pin current}
■ ^{Load regulation of 0.1% for 10 mA to 3A load current}
■ 60 μA typical quiescent current in shutdown mode
■ ^{Guaranteed output current of 3A}
■ ^{Available in TO220-5 and TO263-5 packages}
■ ^{Guaranteed V}_OUT ^{accuracy of ±2.6% with T}_J ^{from 0°C to}
+125°C
■ ^{ERROR flag indicates V}_OUT ^status
■ ^{Over-Temperature and Over-Current protection}
■ ^{−40°C to +125°C operating T}_J ^range
Applications
■ ^{Microprocessor power supplies}
■ ^{GTL, GTL+, BTL, and SSTL bus terminators}
■ ^{Power supplies for DSPs}
■ ^{SCSI terminator}
■ ^{Post regulators}
■ ^{Battery chargers}
■ ^{Other battery powered applications}
Typical Application Circuit
20146801
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