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Adjustable Micropower Low-Dropout Voltage Regulators



National Semiconductor 로고
National Semiconductor
5962-9233601VEA 데이터시트, 핀배열, 회로
May 1999
LP2952/LP2952A/LP2953/LP2953A
Adjustable Micropower Low-Dropout Voltage Regulators
General Description
The LP2952 and LP2953 are micropower voltage regulators
with very low quiescent current (130 µA typical at 1 mA load)
and very low dropout voltage (typ. 60 mV at light load and
470 mV at 250 mA load current). They are ideally suited for
battery-powered systems. Furthermore, the quiescent cur-
rent increases only slightly at dropout, which prolongs bat-
tery life.
The LP2952 and LP2953 retain all the desirable characteris-
tics of the LP2951, but offer increased output current, addi-
tional features, and an improved shutdown function.
The internal crowbar pulls the output down quickly when the
shutdown is activated.
The error flag goes low if the output voltage drops out of
regulation.
Reverse battery protection is provided.
The internal voltage reference is made available for external
use, providing a low-T.C. reference with very good line and
load regulation.
The parts are available in DIP and surface mount packages.
Features
n Output voltage adjusts from 1.23V to 29V
n Guaranteed 250 mA output current
n Extremely low quiescent current
n Low dropout voltage
n Extremely tight line and load regulation
n Very low temperature coefficient
n Current and thermal limiting
n Reverse battery protection
n 50 mA (typical) output pulldown crowbar
n 5V and 3.3V versions available
LP2953 Versions Only
n Auxiliary comparator included with CMOS/TTL
compatible output levels. Can be used for fault
detection, low input line detection, etc.
Applications
n High-efficiency linear regulator
n Regulator with under-voltage shutdown
n Low dropout battery-powered regulator
n Snap-ON/Snap-OFF regulator
Block Diagrams
LP2952
LP2953
DS011127-1
© 1999 National Semiconductor Corporation DS011127
DS011127-2
www.national.com


5962-9233601VEA 데이터시트, 핀배열, 회로
Pinout Drawings
LP2952
14-Pin DIP
LP2952
16-Pin SO
DS011127-11
LP2953
16-Pin DIP
LP2953
16-Pin SO
DS011127-13
DS011127-12
Ordering Information
LP2952
Order
Number
LP2952IN,
LP2952AIN,
LP2952IN-3.3,
LP2952AIN-3.3
LP2952IM,
LP2952AIM,
LP2952IM-3.3,
LP2952AIM-3.3
Temp.
Range
(TJ) ˚C
−40 to
+125
Package
14-Pin
Molded
DIP
NSC
Drawing
Number
N14A
−40 to
+125
16-Pin
Surface
Mount
M16A
DS011127-14
LP2953
Order
Number
LP2953IN,
LP2953AIN,
LP2953IN-3.3,
LP2953AIN-3.3
LP2953IM,
LP2953AIM,
LP2953IM-3.3,
LP2953AIM-3.3
LP2953AMJ/883
5962-9233601MEA
LP2953AMJ-QMLV
5962-9233601VEA
LP2953AMWG/883
5962-9233601QXA
LP2953AMWG-QMLV
5962-9233601VXA
Temp.
Range
(TJ) ˚C
−40 to
+125
−40 to
+125
−55 to
+150
−55 to
+150
Package
NSC
Drawing
Number
16-Pin
N16A
Molded DIP
16-Pin
Surface
Mount
M16A
16-Pin
Ceramic
DIP
J16A
16-Pin
Ceramic
Surface
Mount
WG16A
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Adjustable Micropower Low-Dropout Voltage Regulators - National Semiconductor