150mA Low Dropout
Voltage Regulators
CORPORATION
CLM2950 / CLM2951
FEATURES
PRODUCT DESCRIPTION
5V, 3.3V, and 3.0V Versions at 150mA Output
Very Low Quiescent Current
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Needs Only 1µF for Stability
Current and Thermal Limiting
Unregulated DC Input can Withstand -20V Reverse
Calogic’s CLM2950 and CLM2951 are low power voltage
regulators. These devices are an excellent choice for use in
battery-powered applications such as cordless telephones,
radio control systems, and portable computers. The CLM2950
and CLM2951 features very low quiescent current and very
low dropout voltage (Typ. 50mV at light load and 380mV at
100mA). This includes a tight initial tolerance of 0.5% typ.,
extremely good load and line regulation of 0.05% typ. and
very low output temperature coefficient, making the
CLM2950/CLM2951 useful as a low-power voltage reference.
Other key additional features of this device includes higher
output current (150mA), positive transient protection up to 60V
(Load dump), and the ability to survive an unregulated input
voltage transient of -20V below ground (reverse battery).
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Battery and +60V Positive Transients
Similar Replacement for LP2950/LP2951 Sockets
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CLM2951 Versions Only
Error Flag Warns of Output Dropout
Logic-Controlled Electronic Shutdown
Output Programmable from 1.24 to 29V
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The error flag output feature is used as power-on reset for
warning of a low output voltage, due to falling voltage input of
batteries. Another feature is the logic-compatible shutdown
input which enables the regulator to be switched on and off.
The CLM2950 is offered in a 3-pin TO-92 package compatible
with other 5 volt regulators. The CLM2951 is also available in
8-pin plastic and SO-8.
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APPLICATIONS
Battery Powered Systems
Cordless Telephones
Radio Control Systems
Portable / Palm Top / Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Avionics
Automotive Electronics
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The regulator output voltage may be pin-strapped for a 5V,
3.3V and 3.0 volts or programmed from 1.24 volt to 29 volts
with an external pair of resistors.
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SMPS Post-Regulator
Voltage Reference
ORDERING INFORMATION
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PART
PACKAGE
TEMPERATURE RANGE
CLM2950ACN-X TO-92 (3-Pin)
IND.
IND.
IND.
IND.
IND.
IND.
CLM2950CN-X TO-92 (3-Pin)
CLM2951ACP-X Plastic DIP (8-Pin)
CLM2951CP-X Plastic DIP (8-Pin)
CLM2951ACS-X Plastic SOIC (8-Pin)
CLM2951CS-X
Plastic SOIC (8-Pin)
X = 3.0V, 3.3V or 5.0V
PIN CONNECTIONS
8-PIN SURFACE MOUNT
TO-92
OUTPUT
SENSE
1
2
3
4
8
7
6
5
INPUT
1
2
3
1. OUTPUT
2. GROUND
3. INPUT
FEEDBACK
5V OR 3.3V TAP
ERROR
CLM2951
SHUTDOWN
GROUND
BOTTOM VIEW
1D-47
TOP VIEW
1D-46
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025