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Reverse Battery Protection
Short Circuit Protection
60V Load Dump Protection
-20V Reverse Transient Protection
Portable Instrumentation
Radio Control Systems
Cordless Telephones
APPLICATION
PRODUCT DESCRIPTION
The AS2931 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as
cordless telephones, radio control systems, and portable computers. The AS2931 features offers very low quiescent currents
(0.4 mA.), and very low drop output voltage (typ. 50 mV at light load and 300 mV at 100 mA). Other features include the logic-
compatible On/Off input which enables the regulator to be switched on and off. The AS2931 is offered in a 3-pin TO-92/TO-220
package compatible with other 5V regulators and SOT-89/SO-8 package.
The regulator output voltage may be internally pin-strapped for a 3.5V, 3.3V, 3.0V, or programmed from 3V to 24V with an external
pair of resistors.
ORDERING INFORMATION
TO-92
3-PIN
AS2931AN-X
AS2931N-X
SO-8
AS2931AS-X
AS2931S-X
AS2931CS-X
SOT-89
3-PIN
AS2931AM1-X
AS2931M1-X
TO-220
3/5 PIN
AS2931AU-X
AS2931U-X
AS2931CU-X
OPER. TEMP.
RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN CONNECTIONS
8-Pin Surface Mount (S)
Fixed Output
V
OUT
GND
GND
BYP
1
2
8
7
V
IN
GND
GND
ON/OFF
X = Output Voltages (X = 3.0V, 3.3V, 3.5V)
or blank for Adj.)
TO-220-3 (U)
Fixed
TO-92 (N)
1
2
3
AS2931
1
2
3
V
OUT
AS2931
3
4
6
5
SOT-89 (M1)
Top View
8-Pin Surface Mount (S)
Adj Output
V
OUT
GND
1
2
8
7
V
IN
GND
GND
ON/OFF
AS2931
1
2
3
1. V
IN
2. GND
3. V
OUT
V
OUT
GND
V
IN
V
IN
GND
Bottom View
Top View
AS2931
GND
ADJ
3
4
6
5
Front View
Top View
Rev. 10/11/00
1
2
3
4
5
