LP2951CM-5 Semtech Corporation, LP2951CM-5 Datasheet
LP2951CM-5
Manufacturer Part Number
LP2951CM-5
Description
150mA ADJUSTABLE VOLTAGE REGULATOR
Manufacturer
Semtech Corporation
Datasheet
1.LP2951CM-5.pdf
(3 pages)
March 17, 1998
DESCRIPTION
The LP2951 series of low power voltage regulators
have low quiescent current and low dropout voltage.
The quiescent current increases minimally during
dropout conditions thereby extending battery life.
Available in the 8 lead SOIC package, the LP2951 se-
ries includes features such as shutdown and low out-
put voltage detect (typically due to low battery condi-
tions). This function may also be used as a power on
reset function when triggered by CMOS or TTL inputs.
The circuit can be used as a fixed voltage 5 volt (3.3
volt for LP2951CM-3.3) regulator or adjusted between
1.24 volts and 29 volts using external resistor pairs.
BLOCK DIAGRAM
PIN CONFIGURATION
© 1998 SEMTECH CORP.
150mA ADJUSTABLE
VOLTAGE REGULATOR
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
FEATURES
APPLICATIONS
ORDERING INFORMATION
LP2951CM-X.X
Notes:
(1) Where -X.X denotes voltage options. Available
voltages are: 3.3V (-3.3) and 5V (leave blank).
(2) Add suffix ‘TR’ for tape and reel.
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Shutdown Input
Voltage
Error Comp. Output
Voltage
Power Dissipation
Thermal Resistance
Junction to Ambient
Operating Junction
Temperature Range
Storage
Temperature Range
Lead Temperature
(Soldering) 5 Sec
=
=
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=
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652 MITCHELL ROAD NEWBURY PARK CA 91320
DEVICE
Guaranteed 150mA current
Adjustable output voltage - 1.24V to 29V
Accurate 5V or 3.3V output @ 100mA
Low dropout voltage - 350-400mV @ 100mA
Regulator or reference functions
Direct replacement for LP2951C, MIC2951-03,
AS2951C
Microcontroller supplies
Linear regulators
Adjustable Supplies
Switching power supplies - post-regulation
Portable modems
Battery powered systems
Cellular telephones
Voltage references
(1)(2)
Symbol
T
T
OUTPUT
V
P
T
LEAD
STG
JA
IN
D
J
ADJ
Maximum
-40 to 125
-65 to 150
-0.3 to 30
-0.3 to 30
-0.3 to 30
Internally
Limited
175
260
PACKAGE
LP2951
SO-8
Units
°C/W
°C
°C
°C
W
V
V
V
1
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LP2951CM-5 Summary of contents
Page 1
... This function may also be used as a power on reset function when triggered by CMOS or TTL inputs. The circuit can be used as a fixed voltage 5 volt (3.3 volt for LP2951CM-3.3) regulator or adjusted between 1.24 volts and 29 volts using external resistor pairs. BLOCK DIAGRAM PIN CONFIGURATION © ...
Page 2
... March 17, 1998 ELECTRICAL CHARACTERISTICS Unless specified, limits are over operating temperature range (T Parameter Symbol Output Voltage LP2951CM V OUT LP2951CM-3.3 (1) Temp Coefficient T C Line Regulation REG (LINE) Load Regulation REG (LOAD) Dropout Voltage V D Ground Current I GND Dropout Ground Current I GND(D) Current Limit ...
Page 3
March 17, 1998 OUTLINE DRAWING SO-8 LAND PATTERN SO-8 © 1998 SEMTECH CORP. 150mA ADJUSTABLE VOLTAGE REGULATOR 652 MITCHELL ROAD NEWBURY PARK CA 91320 LP2951 3 ...