CAT431L

更新时间： 2024-11-20 22:40:07

品牌	Logo	应用领域
CATALYST		/
页数	文件大小	规格书
11页	148K
描述
Low-Voltage Adjustable Precision Voltage Reference

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CAT431L 数据手册

CAT431L

Low-Voltage Adjustable Precision Voltage Reference

- 0.5% Tolerance

- SOT23 and TO92 Packages

- Low Startup Overshoot

FEATURES

■ Low startup overshoot

■ Low dynamic impedance: 0.3Ω at 1kHz

■ Compact 3-lead SOT23 package option

■ Industrial temperature range: -40°C to 85°C

■ Adjustable output voltage: V_REFto 6V

■ Wide current operation: 40µA to 100mA

■ Low temperature coefficient reference: +12mV

max deviation over temperature

■ Accurate 1.24V reference voltage: +0.5%

(+6mV) at 25°C

APPLICATIONS

■ SMPS control loop

■ Current limiting

■ Shunt regulator

■ Over/Under voltage monitor

■ 3V Off-line switching regulators

■ Low temperature coefficient voltage reference

DESCRIPTION

Minimal overshoot at startup and wide AC bandwidth

make the CAT431L easy to apply in a wide set of

applications. When used with an opto-coupler, the

CAT431L is an ideal voltage reference in isolated

feedback circuits for 3V to 3.3V switch-mode power

supplies.

The CAT431L is a low-voltage three-terminal

adjustable shunt voltage reference with guaranteed

thermal stability over the industrial temperature range.

The CAT431L has a lower 1.24V reference and wider

operating current range than the widely used TL431

and TL431A shunt-regulator references. Compared

to the TLV431/A, the CAT431L 1.24V reference is two

times more accurate.

FUNCTIONAL DIAGRAM

CATHODE

REF

–

REF

1.24

REF

ANODE

Characteristics subject to change without notice

Doc. No. 4006, Rev. J

12 3 4 5 6 7...11

中文翻译

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