Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Advanced
Monolithic
150mA LOW DROPOUT VOLTAGE REGULATOR
Systems
AMS112
WITH ON/OFF SWITCH
PRELIMINARY INFORMATION
FEATURES
3.3V and 5V Voltage Available*
Active High On/Off Control
Output Current of 150mA
Very Low Quiescent Current
Low Dropout Voltage of 80mV at 30mA
Very Low Noise
Short Circuit Protection
Internal Thermal Shutdown
Space Saving 5 Lead SOT-23 Package
APPLICATIONS
Battery Powered Systems
Portable Consumer Equipment
Cordless Telephones
Portable (Notebook) Computers
Portable Instrumentation
Radio Control Systems
Personal Communication Equipment
Toys
Low Voltage Systems
GENERAL DESCRIPTION
The AMS112 series consists of positive fixed voltage regulators featuring an internal electronic switch controlled by TTL or
CMOS logic levels. When the Control pin is pulled to a logic high level, the device is in the ON state. If the control function
is not used, the control terminal should be connected to a logic high level or V
IN
, therefore allowing the regulator to be ON.
The regulator will be ON when the control terminal voltage is grater than 1.8V. To lower the output noise level to 30
μ
V
rms
,
an external capacitor can be connected to the noise bypass pin. These devices feature very low quiescent current of 1mA when
supplying 30mA loads (180
μ
A at no load). This unique characteristic and the low standby current (typ. 100nA) make the
AMS112 ideal to use for standby power systems. Like other regulators the AMS112 series also includes internal current
limiting and thermal shutdown.
The AMS112 is offered in 3.3V and 5.0V output voltages, and is available in the 5-pin SOT-23 surface mount package.
ORDERING INFORMATION
PIN CONNECTIONS
PACKAGE TYPE
5L SOT-23
AMS112M1-X
X =3.3V or 5V
*For additional available fixed voltages contact factory
OPERATING TEMP.
RANGE
IND
5 Lead SOT-23
(M1)
ON/OFF
INPUT
BYPASS
OUTPUT
GROUND
1
2
5
3
4
Bottom View