TL1431CDR

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TL1431CDR

IC VREF SHUNT ADJ 0.4% 8SOIC

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Specifications

Part Status Active
Base Product Number TL1431
Reference Type Shunt
Output Type Adjustable
Voltage - Output (Min/Fixed) 2.5V
Current - Output 100 mA
Tolerance ±0.4%
Operating Temperature 0°C ~ 70°C (TA)
Mounting Type Surface Mount
Package 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
Packaging Cut Tape (CT), Tape & Reel (TR)
Voltage - Output (Max) 36 V
Current - Cathode 1 mA

Overview

Description

TL1431CDR is a Texas Instruments precision shunt regulator (adjustable reference), part of the TL431-style family. It provides a stable internal reference and sinks current to hold its cathode voltage at the programmed level via an external resistor divider.
How it works: Connect a divider from the output to the reference/input pin and to ground. When the divider voltage reaches the internal reference, the device conducts and clamps the node, regulating the voltage. By choosing the two resistors, you set the desired output level.
Common uses: feedback in linear and switching power supplies, precision voltage references, LED driver/regulation, and battery-charging circuits.
Key notes: exact reference voltage, operating current range, and temperature behavior vary by variant; check the TI TL1431CDR datasheet for precise specs. The “CDR” suffix indicates specific packaging/tape-and-reel options from TI.

Features

TL1431CDR is a 3‑terminal adjustable precision shunt regulator (1.24 V reference).
Key features:
- Reference: 1.24 V (typical)
- External resistor network sets output voltage
- Wide operating range: up to ~36 V across cathode-anode
- Regulation current: typically 1 mA to tens of mA (max ~100 mA)
- Low dynamic impedance with good line/load regulation
- Temperature-stable reference
- Stable with output capacitance; suitable for simple regulation and reference duties
- Packaging: 3-pin device in Tape & Reel (CDR suffix) suitable for SOT-23/TO-92 styles
Common用途: precision references, shunt regulation in power supplies, ADC/DAC reference networks, and LED-driver circuits.

Package

SOT-23-3 (3-pin) surface-mount package.

Pinout

- Pin count: 3
- Function: Three-terminal adjustable precision shunt regulator (TL431-family). It provides a fixed reference between Ref and Anode and shunts current from Cathode to regulate voltage in feedback networks (programmable zener).

Manufacturer

- Manufacturer: Texas Instruments (TI).
- About the company: TI is an American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits and related products for electronics designers and manufacturers.

Application

TL1431CDR is a programmable shunt regulator (TL431 family). Typical applications include:
- Adjustable precision voltage reference for regulators and measurement circuits
- Feedback/reference element in linear and switching power supplies
- Precision reference for ADC/DAC and analog circuits
- Battery chargers (constant-current/constant-voltage regulation)
- LED driver and backlight regulation
- Test, instrumentation, and other circuits requiring a stable reference voltage

Equivalent

TL1431CDR is TI’s variant of the TL431-like adjustable shunt regulator (2.495 V reference). Common equivalents: TL431, TLV431, LMV431, AZ431. They’re generally interchangeable in circuits, with differences in accuracy, operating current, and packaging.

Shipping

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

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