AS2937
500mA Low Dropout Voltage Regulators
(PRELIMINARY INFORMATION)
FEATURES
•
Output Current 500mA at 15V,12V, 10V, 8V, 5V, 3.3V and 2.5V
•
Internal Short Circuit Current Limit
•
Dropout Voltage 0.5V at 500mA Output
•
Extremely Tight Load and Line Regulation
•
Very Low Temperature Coefficient
•
Mirror Image Insertion Protection
•
Direct Replacement For LM2937 Socket
APPLICATIONS
•
Battery Powered Systems
•
Cordless Telephones
•
Automotive Electronics
•
Portable/ Palm Top / Notebook Computers
•
Portable Consumer Equipment
•
Portable Instrumentation
•
SMPS Post-Regulator
•
Voltage Reference
PRODUCT DESCRIPTION
The AS2937 is a low power positive voltage regulator. The AS2937 offers 500mA output current with a dropout voltage of only 0.5V
and over temperature dropout is up to 1V. The quiescent current is 10mA at differential output of 5V and output current of 500mA. A
higher quiescent current can exist when the device is in dropout mode (V
IN
- V
OUT
≤
3V )
The regulator will automatically shut down to protect both the internal circuits and the load. This device also features short circuit and
thermal overload protection.
The AS2937 is offered in a 3-pin TO-220 package compatible with other 5 volt and 3.3 volt regulators, TO-263 and SOT-223. This
device offers a variety of output voltages 15V,12V, 10V, 8V, 5V, 3.3V and 2.5V. AS2937 is a direct replacement to LM2937.
ORDERING INFORMATION
TO-220
3-PIN
AS2937U-X
TO-263
3 PIN
AS2937T-X
SOT-223
3-PIN
AS2937M3-X
OPERATING
TEMP. RANGE
-40
°C
to +125°C
X = Output Voltage (X = 2.5V, 3.3V, 5.0V, 8.0V, 10V, 12V or 15V
Consult factory for other fixed voltages.
PIN CONNECTIONS
SOT-223 (M3)
TO-263-3 (T)
TO-220-3 (U)
AS2937
1
2
3
1
AS2937
2
3
AS2937
1
2
3
V
IN
GND V
OUT
Top View
V
OUT
GND V
IN
Top View
V
OUT
GND V
IN
Front View
Rev. 9/29/00
SIPEX [ SIPEX CORPORATION ]
