LP3875-ADJ Datasheet PDF - National Semiconductor


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LP3875-ADJ
National Semiconductor

Part Number LP3875-ADJ
Description 1.5A Fast Ultra Low Dropout Linear Regulators
Page 15 Pages

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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
n Ultra low dropout voltage
n Low ground pin current
n Load regulation of 0.06%
n 10nA quiescent current in shutdown mode
n Guaranteed output current of 1.5A DC
n Available in TO-263, TO-220 and SOT-223 packages
n Minimum output capacitor requirements
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
Applications
n Microprocessor power supplies
n GTL, GTL+, BTL, and SSTL bus terminators
n Power supplies for DSPs
n SCSI terminator
n Post regulators
n High efficiency linear regulators
n Battery chargers
n Other battery powered applications
Typical Application Circuit
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*See Application Hints
© 2005 National Semiconductor Corporation DS200746
20074645
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Connection Diagrams
Top View
TO220-5 Package
Bent, Staggered Leads
20074605
20074606
Top View
TO263-5 Package
20074681
Top View
SOT223-5 Package
Pin Description for TO220-5 and TO263-5 Packages
Pin #
1
2
3
4
5
Name
SD
VIN
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GND
VOUT
ADJ
LP3875-ADJ
Function
Shutdown
Input Supply
Ground
Output Voltage
Set Output Voltage
Pin Description for SOT223-5 Package
Pin #
1
2
3
4
5
Name
SD
VIN
VOUT
ADJ
GND
LP3875-ADJ
Function
Shutdown
Input Supply
Output Voltage
Set Output Voltage
Ground
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Ordering Information
Package Type Designator is "T" for TO220 package, "S" for TO263 package, and "MP" for SOT-223 package.
20074631
Output
Voltage
Order Number
ADJ LP3875EMP-ADJ
ADJ LP3875EMPX-ADJ
ADJ LP3875ES-ADJ
ADJ LP3875ESX-ADJ
ADJ LP3875ET-ADJ
TABLE 1. Package Marking and Ordering Information
Description
(Current,
Option)
1.5A, Adj
Package Type
SOT223-5
Package Marking
LHSB
1.5A, Adj
SOT223-5
LHSB
1.5A, Adj
1.5A, Adj
1.5A, Adj
TO263-5
TO263-5
TO220-5
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LP3875ES-ADJ
LP3875ES-ADJ
LP3875ET-ADJ
Supplied As:
1000 Units on Tape
and Reel
2000 Units on Tape
and Reel
Rail
Tape and Reel
Rail
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Block Diagram
LP3875-ADJ
www.DataSheet.co.kr
20074629
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