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AT431C Datasheet

  • AT431C

  • Low-Voltage Adjustable Precision Shunt Regulator

  • 356.48KB

  • 14頁(yè)

  • ETC

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AT431
Low-Voltage Adjustable Precision
Shunt Regulator
Features
藱Low-Voltage
Operation: Down to 1.24V
藱1%
Reference-Voltage Tolerance
藱Adjustable
Output Voltage, Vo=Vref to 12V
藱Low
Operational Cathode Current鈥?50渭A
藱0.25鈩?/div>
Typical Output Impedance
藱SOT-23-3
, SOT-23-5 and TO-92 Packages
Description
The AT431 is low-voltage three-terminal
adjustable voltage reference with specified
thermal stability over applicable commercial
temperature ranges. Output voltage may be set to
any value between Vref (1.24V) and 12V with
two external resistors (see Figure 2).
When used with an optocoupler, the AT431 is
ideal voltage reference in isolated feedback
circuits for 1.8V to 12 V switching-mode power
supplies. This device has typical output
impedance of 0.20鈩? Active output circuitry
provides a very sharp turn-on characteristic,
making the AT431 excellent replacements for
low-voltage zener diodes in many applications,
including onboard regulation and adjustable
power supplies.
Application
藱Linear Regulators
藱Voltage Reference for Power Circuit
Block Diagram and Symbol
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW:
http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email:
service@aimtron.com.tw
1

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