AMS2942
FEATURES
•
Adjustable from 1.23V to 42V
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High Accuracy Output Voltage
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Extremely Low Quiescent Current
•
Low Dropout Voltage
•
Tight Load and Line Regulation
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Low Temperature Coefficient
•
Current and Thermal Protection
•
Unregulated DC Positive Transients 60V
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Error Flag Warning of Voltage Output Dropout
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Logic Controlled Electronic Shutdown
APPLICATIONS
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Telephone Systems
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High Voltage Power Supply
•
Cordless Telephones
•
Laboratory Instrumentation
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Radio Control Systems
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Automotive Electronics
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Avionics
GENERAL DESCRIPTION
The AMS2942 are micropower voltage regulators ideally suited for use with high voltage powered systems. This device
feature very low quiescent current (typ.130µA), and very low dropout voltage (typ.45mV at light loads and 380mV at
100mA). The quiescent current increases only slightly in dropout. The AMS2942 has positive transient protection up to 60V
and can survive unregulated input transient up to 20V below ground.
AMS2942 is designed with a tight initial voltage reference tolerance, excellent load and line regulation (typ. 0.05%), and a
very low output voltage temperature coefficient, making these devices useful as a low-power voltage regulator in telephone
applications, using the telephone line as a power source.
The AMS2942 is available in a special 8-pin plastic SOIC in which pin 2 and 3 are fused together with the package paddle
serving also as heat sink. An error flag output warns of a low output voltage, often due to failing voltage on input line. A
logic-compatible shutdown input is available, which enables the regulator to be switched on and off. The output voltage can be
programmed from 1.23V to 42V with an external pair of resistors.
ORDERING INFORMATION
PACKAGE TYPE
8 LEAD SOIC
AMS2942AS
AMS2942BS
OPERATING
TEMP. RANGE
IND
IND
PIN CONNECTION
8L SOIC
OUTPUT 1
GROUND 2
GROUND 3
ON/OFF 4
8 INPUT
7 FEEDBACK
6 N/C
5 ERROR
Top View
1
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
