Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Advanced AMS431
Monolithic PRECISION ADJUSTABLE SHUNT REGULATOR
Systems
FEATURES APPLICATIONS
• Trimmed 0.25% Reference • Battery Powered Systems
• Wide Operating Current Range 250 µA to 150mA • Switching Power Supplies
• Low Dynamic Output Impedance • Adjustable Power Supplies
• Low Output Noise • Linear Regulators
• Nominal Temperature Range to 85 °C • Error Amplifiers
• Temperature-Compensated: 60ppm/ °C • Notebook/Personal Computer
• Internal Amplifier with 150mA Capability • Monitors/ VCR/ TV
• Pagers
GENERAL DESCRIPTION
The AMS431 is a three-terminal adjustable shunt regulator with guaranteed temperature stability over the entire range of
operation. The output voltage can be set to any value between 2.5V (VREF) and 36V by adding two external resistors. Due to
the sharp turn-on characteristics this device is an excellent replacement for zener diodes in many applications.
AMS431 is available in TO-92, SO-8, SOT-89 and SOT-23 packages.
ORDERING INFORMATION:
TOL. PACKAGE TYPE OPERATING
TO-92 8 LEAD SOIC SOT-89 3 LEAD SOT-23 TEMP. RANGE
±0.25% AMS431AN AMS431AS AMS431AL AMS431AM -40 to +85 ° C
±0.5% AMS431BN AMS431BS AMS431BL AMS431BM -40 to +85 ° C
±1.0% AMS431CN AMS431CS AMS431CL AMS431CM -40 to +85 ° C
PIN CONNECTIONS
TO-92 8L SOIC SOT-89 3L SOT-23
Plastic Package (N) SO Package (S) (L) (M)
1 2 3
REF
ANODE
CATHODE
2
8
3
4
7
6
5
ANODE
N/CN/C
ANODEANODE
ANODE
1 REFCATHODE
1 2 3
CATHODEANODEREF CATHODEREF
ANODE
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