TL431G-AB3-R – UTC Programmable Precision Shunt Regulator

Quick Answer The TL431G-AB3-R is a three-terminal programmable precision shunt regulator from Unisonic Technologies (UTC). It provides a highly accurate reference voltage that is adjustable from 2.5V to 36V with two external resistors. Featuring excellent thermal stability, low dynamic impedance, and higher power dissipation capability in SOT-89 package, it is ideal for use as a precision voltage reference, error amplifier in power supplies, and voltage monitoring in industrial, consumer, and battery-powered applications.

Current Stock at ICMASS: Strong inventory available for immediate worldwide delivery.

Key Specifications

[Download Official TL431 Datasheet PDF]

Why Choose TL431G-AB3-R?

• Programmable output voltage from 2.5V to 36V
• High precision reference voltage (±1% or better)
• Low dynamic output impedance
• Excellent temperature stability
• Higher power dissipation capability in SOT-89 package
• Wide operating current range
• Pb-free, RoHS compliant, and cost-effective

Typical Applications

• Switching power supply feedback control
• Precision voltage reference
• Battery voltage monitoring
• LED driver constant current circuits
• Audio equipment and amplifiers
• Industrial control systems
• Over-voltage / under-voltage protection
• Error amplifiers in linear regulators

TL431G-AB3-R Alternatives & Cross Reference Popular Alternatives:

• TL431 series (other packages: SOT-23, TO-92, SOIC-8)
• TL431 from TI / onsemi
• AZ431 / KA431 (other manufacturers)
• LM431
• TLV431 (lower voltage version)

Comparison Table:

Purchasing Information at ICMASS

• Stock Status: Strong inventory available
• MOQ: 100 pieces (samples welcome)
• Lead Time: 1-3 days for stock orders
• Shipping: Fast global delivery (DHL, UPS, FedEx)
• Quality Guarantee: 100% genuine UTC components

Get Competitive Quote – Contact us for bulk pricing and technical support.

Frequently Asked Questions (FAQ)

Q1: What is the TL431G-AB3-R mainly used for? A: It is a programmable shunt regulator used as a precision voltage reference and error amplifier in power supplies.

Q2: What is the adjustable output voltage range? A: 2.5V to 36V.

Q3: What package does the TL431G-AB3-R use? A: SOT-89 (AB3) surface mount package, supplied in Tape & Reel.

Q4: What is the reference voltage accuracy? A: ±1% typical at 25°C.

Q5: What is the minimum cathode current? A: 1 mA.

Q6: Is it suitable for switching power supplies? A: Yes, it is widely used in the feedback loop of flyback and other SMPS designs.

Q7: What is the maximum operating temperature? A: +125°C.

Q8: Do you have real stock of TL431G-AB3-R? A: Yes, we maintain good inventory levels for fast delivery.

Q9: Why choose SOT-89 package? A: It offers better thermal dissipation compared to SOT-23.

Q10: Can you provide reference designs or layout recommendations? A: Yes, we supply official UTC datasheet and typical application circuits.

Q11: Do you offer volume pricing? A: Yes. Competitive tiered pricing is available for quantities from 1K to 100K+.

Q12: How does TL431 compare to TLV431? A: TL431 has a 2.5V reference and supports up to 36V, while TLV431 has a 1.24V reference and lower maximum voltage.

Related Products

• TL431 series (different packages and accuracy grades)
• TLV431 low voltage version
• Other UTC Voltage References and Shunt Regulators
• Linear regulators (78xx / LM317 series)