AS431I_11 Datasheet, PDF (1/17 Pages) BCD Semiconductor Manufacturing Limited – LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR

Data Sheet
LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR AS431I
General Description
The AS431I is a three-terminal adjustable shunt reg-
ulator with guaranteed thermal stability over a full
operation range. It features sharp turn-on characteris-
tics, low temperature coefficient and low output
impedance, which make it ideal substitute for Zener
diode in applications such as switching power supply,
charger and other adjustable regulators.
The output voltage of AS431I can be set to any value
between V_REF (2.5V) and the corresponding
maximum cathode voltage (36V).
The AS431I is offered in two grade initial voltage
tolerance at 25℃, 0.5%, and 1%.
This IC is available in 3 packages: TO-92 (bulk or
ammo packing), SOT-23 and SOT-89.
Features
y Programmable Precise Output Voltage from
2.5V to 36V
y High Stability Under Capacitive Load
y Low Minimum Cathode Current for Regulation:
10µA (Typ.), 50µA (Max.)
y Low Temperature Deviation: 4.5mV Typical
y Sink Current Capacity from 50µ A to 100mA
y Low Output Noise
y Wide Operating Range: -40℃ to 125℃
Applications
y Charger
y Voltage Adapter
y Switching Power Supply
y Graphic Card
y Precision Voltage Reference
TO-92(Bulk Packing)
TO-92(Ammo Packing)
SOT-89
SOT-23
Figure 1. Package Type of AS431I
Aug. 2011 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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