AMS421 Datasheet, PDF (1/7 Pages) Advanced Monolithic Systems – 0.5V SHUNT REGULATOR

Advanced
Monolithic
Systems
FEATURES
• Trimmed 0.25% Tolerance
• Wide Operating Current Range 0.1µA to 10mA
• Low Reference Input Current 1.5nA
• Low Dynamic Output Impedance
• Low Output Noise
• Nominal Temperature Range to 125°C
• Temperature-Compensated: 50ppm/°C
• Low supply current: typ. 10µA
AMS421
0.5V SHUNT REGULATOR
RoHS compliant
APPLICATIONS
• Battery Powered Systems
• Switching Power Supplies
• Isolated Power Supplies
• Telecommunications
• Error Amplifiers
• Notebook/Personal Computer
• Monitors/ VCR/ TV
• Optoisolator driver
GENERAL DESCRIPTION
The AMS421 is a four-terminal adjustable open collector shunt regulator with guaranteed temperature stability over the entire
range of operation. The output voltage can be set to any value between 0.5V (V_REF) and 15V by adding two external resistors.
The AMS421 features 0.25% initial tolerance, low dynamic output impedance and operates over a wide current range. Due to
the sharp turn-on characteristics this device is an excellent replacement for Zener diodes in many applications.
AMS421 is available 5 pin SOT-23 packages.
ORDERING INFORMATION:
PIN CONNECTIONS
TOL.
±0.25%
±0.5%
±1.0%
Package
5 LEAD SOT-23
AMS421AM1
AMS421BM1
AMS421CM1
BLOCK DIAGRAM
V_CC
1
Ref
+
4
-
0.5V
OPERATING
TEMP. RANGE
-40 to + 125°C
-40 to + 125°C
-40 to + 125°C
5 Co
5L SOT-23
(M1)
VCC 1
GND 2
N/C 3
5 COLL
4 REF
Top View
2
GND
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