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TL431AIYDT

Name: TL431AIYDT
Rating: 4.7 (12 reviews)

IC VREF SHUNT ADJ 1% 8SO

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Mfr。パート #TL431AIYDT
パッケージ SOIC-8
データシート TL431AIYDT DataSheet
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仕様

Package	Tape & Reel (TR),Cut Tape (CT)
Series	Automotive, AEC-Q100
ProductStatus	Active
ReferenceType	Shunt
OutputType	Adjustable
Voltage-Output(Min/Fixed)	2.495V
Voltage-Output(Max)	36 V
Current-Output	100 mA
Tolerance	±1%
Current-Cathode	700 µA
OperatingTemperature	-40°C ~ 125°C (TA)
MountingType	Surface Mount
Package/Case	8-SOIC (0.154, 3.90mm Width)

概要

Description

TL431AIYDT is Texas Instruments’ TL431 programmable precision shunt regulator in a small SOT-23 style three‑pin package (AIYDT is the package/tape code). It behaves like an adjustable Zener plus error amplifier: it holds the reference pin at about 2.495 V and uses an external resistor divider to set the output.
How it works:
- Cathode to output, Anode to ground, Ref to divider between output and ground.
- The device regulates so Ref ≈ 2.495 V. Output voltage is set by Vout ≈ Vref (1 + R1/R2) + Iref·R1 (Iref is typically small).
Key specs (typical):
- Vref ≈ 2.495 V
- Max cathode current ≈ 100 mA
- VKA (max cathode–anode voltage) up to ~36 V
- Optional temperature/accuracy variants exist
Applications:
- Adjustable regulation in linear/post-reg power supplies
- Battery charger references
- LED driver/regulators
- General precision reference/-error amplifier
Note: Verify exact pinout and temperature range from the datasheet for the AIYDT variant.

Features

TL431AIYDT features (programmable shunt regulator in SOT-23-3):
- 2.495 V precise reference (adjustable output via external divider)
- External resistor network programs Vout: Vout ≈ Vref(1 + R1/R2) + Iadj·R1
- Regulates by sinking current; cathode current range ~1 mA to 100 mA (max)
- Input (cathode–anode) voltage up to about 36 V
- Temperature range typically −40°C to +125°C; accuracy varies by grade (A ≈ ±0.5% @ 25°C)
- Low dynamic impedance with good line and load regulation
- Suitable as a precision adjustable Zener in power supplies, LED drivers, battery chargers, and other regulator applications
- Package: AIY (SOT-23, 3-pin, surface-mount)
Note: exact accuracy and current rating can vary with grade; check the specific datasheet for TL431AIYDT.

Package

TL431AIYDT comes in a 3-pin SOT-23 package (SOT-23-3).

Pinout

- Pin count: 3 pins (in SOT-23-3 and similar packages).
- Function: Programmable precision shunt regulator (adjustable voltage reference). It maintains a ~2.495 V reference between the REF pin and the ANODE pin and shunts current from CATHODE to ANODE to regulate the voltage. Used in feedback loops to set output voltage in DC/DC converters and other power supplies.
- Typical pinout (SOT-23-3): Pin 1 = REF, Pin 2 = ANODE, Pin 3 = CATHODE.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- Company type: American multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital integrated circuits; headquartered in Dallas, Texas.

Application

TL431AIYDT is a programmable precision shunt regulator (adjustable Zener). Typical applications:
- Feedback/reference in switch-mode and linear power supplies
- Adjustable voltage reference for instrumentation/ ADCs
- Constant-current LED drivers and battery charging control
- Overvoltage protection and crowbar circuits
- General-purpose reference in test/measurement equipment

Equivalent

TL431AIYDT is an adjustable precision shunt regulator (2.495 V reference). Common equivalents include:
- LMV431 / LMV431A (National Semiconductor/TI)
- TLV431 (TI)
- KA431 / KA431A (various vendors)
- AZ431 (Diodes Inc.)
- REF431 (Analog Devices)
Note: verify pinout, package, and current ratings before substitution, as performance and packaging can differ.