LP2975AIMM-3.3 National Semiconductor, LP2975AIMM-3.3 Datasheet
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LP2975AIMM-3.3
Manufacturer Part Number
LP2975AIMM-3.3
Description
Manufacturer
National Semiconductor
Datasheets
1.LP2975IMM-5.0.pdf
(20 pages)
2.LP2975IMM-5.0.pdf
(19 pages)
3.LP2975IMM-5.0.pdf
(19 pages)
Specifications of LP2975AIMM-3.3
Date_code
04+
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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Part Number:
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Manufacturer:
NS
Quantity:
384
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Part Number:
LP2975AIMM-3.3
Manufacturer:
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© 2005 National Semiconductor Corporation
LP2975
MOSFET LDO Driver/Controller
General Description
A high-current LDO regulator is simple to design with the
LP2975 LDO Controller. Using an external P-FET, the
LP2975 will deliver an ultra low dropout regulator with ex-
tremely low quiescent current.
High open loop gain assures excellent regulation and ripple
rejection performance.
The trimmed internal bandgap reference provides precise
output voltage over the entire operating temperature range.
Dropout voltage is “user selectable” by sizing the external
FET: the minimum input-output voltage required for opera-
tion is the maximum load current multiplied by the R
of the FET.
Overcurrent protection of the external FET is easily imple-
mented by placing a sense resistor in series with V
57 mV detection threshold of the current sense circuitry
minimizes dropout voltage and power dissipation in the re-
sistor.
The standard product versions available provide output volt-
ages of 12V, 5V, or 3.3V with guaranteed 25˚C accuracy of
1.5% (“A” grade) and 2.5% (standard grade).
Block Diagram
*R
part.
SET
values are: 208k for 12V part, 72.8k for 5V part, and 39.9k for 3.3V
DS100034
DS
IN
. The
(ON)
10003401
Features
n Simple to use, few external components
n Ultra-small mini SO-8 package
n 1.5% (A grade) precision output voltage
n Low-power shutdown input
n
n Low operating current (180 µA typical
n Wide supply voltage range (1.8V to 24V)
n Built-in current limit amplifier
n Overtemperature protection
n 12V, 5V, and 3.3V standard output voltages
n Can be programmed using external divider
n −40˚C to +125˚C junction temperature range
Applications
n High-current 5V to 3.3V regulator
n Post regulator for switching converter
n Current-limited switch
Connection Diagram
<
1 µA in shutdown
Surface Mount Mini SO-8 Package
See NS Package Number MUA08A
See Table 1 of this Document
For Order Numbers
Top View
10003402
@
V
IN
www.national.com
= 5V)
March 2005