The TLVH431AQDBZR is a precision adjustable shunt voltage reference integrated circuit manufactured by Texas Instruments (formerly Luminary Micro) that serves as a critical component in power management applications. This device belongs to the Power Management IC (PMIC) voltage reference category and functions as a three-terminal adjustable shunt regulator capable of maintaining precise voltage regulation across a wide range of applications.
This voltage reference IC addresses several key design challenges in modern electronic systems, including the need for accurate voltage regulation with minimal temperature drift, compact form factor requirements, and reliable performance across harsh operating conditions. The device operates as a shunt regulator, meaning it maintains a constant voltage by shunting excess current to ground, making it ideal for applications requiring stable reference voltages or simple voltage regulation.
The TLVH431AQDBZR delivers exceptional precision with a tight ±1% tolerance specification, ensuring consistent performance across production units. The device provides an adjustable output voltage range from 1.24V minimum to 18V maximum, with a maximum output current capability of 70mA and cathode current handling up to 100µA. Its wide operating temperature range of -40°C to 125°C makes it suitable for both commercial and industrial applications, while the compact SOT-23-3 surface mount package (also known as TO-236-3 or SC-59) enables space-efficient PCB layouts.
The primary advantages of this voltage reference include its high accuracy, low temperature coefficient, excellent long-term stability, and cost-effective three-terminal design that simplifies circuit implementation. The adjustable nature allows designers to set precise output voltages using external resistor networks, providing flexibility in various applications. The device's shunt configuration offers inherent short-circuit protection and can function as both a voltage reference and a simple voltage regulator.
Compatibility-wise, the TLVH431AQDBZR is designed for surface mount assembly and comes in tape and reel packaging suitable for automated pick-and-place manufacturing processes. The device is RoHS3 compliant, meeting current environmental regulations for lead-free manufacturing. Its standard SOT-23-3 footprint ensures compatibility with existing PCB designs and manufacturing processes.
Primary application areas include switching power supplies as feedback reference elements, linear regulators for voltage setting and regulation, battery chargers for precision voltage control, LED drivers for current regulation, automotive electronics requiring stable references, industrial control systems, telecommunications equipment, and consumer electronics where space and accuracy are critical. The device is particularly valuable in applications requiring precise voltage monitoring, overvoltage protection circuits, and as a replacement for Zener diodes where better accuracy and temperature stability are needed.
Equivalent and alternative models include the industry-standard TL431 series, with direct alternatives being the TL431A, TL431B, and LM431 from various manufacturers including STMicroelectronics, ON Semiconductor, Diodes Incorporated, and Fairchild Semiconductor. Pin-compatible alternatives include the LM4040 precision voltage reference series, though with different electrical characteristics, and the REF3012/REF3018/REF3025 series from Texas Instruments for applications requiring different voltage outputs. Other comparable shunt references include the LT1431 from Linear Technology (now Analog Devices), the MC1403 from ON Semiconductor, and various manufacturer-specific versions such as Vishay's Si431, each offering similar functionality with slight variations in specifications, packaging options, or temperature ranges to suit different application requirements.
TLVH431AQDBZR Key Technical Attributes
Shunt Voltage Reference
Adjustable Output
±1% Tolerance
TLVH431AQDBZR Packing Size
The TLVH431AQDBZR comes in a compact SOT-23-3 package, which is also designated as TO-236-3 or SC-59. This ultra-small, surface-mount chip is specifically designed to save space on printed circuit boards while ensuring robust electrical performance. The SOT-23-3 package is made from high-quality molded plastic, offering excellent thermal reliability across an operating temperature range of -40°C to 125°C (TA). It uses three pins, with a pin configuration optimized for voltage reference applications, and comes in Tape & Reel packaging suitable for high-speed automated assembly.
TLVH431AQDBZR Application
Ideal for power management tasks, the TLVH431AQDBZR is widely used in adjustable voltage reference circuits, precision regulators, SMPS (Switch Mode Power Supplies), battery management, and analog-to-digital converter reference systems. Its adjustable output and shunt reference make it suitable for low-voltage, high-precision designs in consumer electronics, industrial controls, medical instrumentation, and automotive systems.
TLVH431AQDBZR Features
This device features an adjustable shunt regulator configuration, allowing output voltages from 1.24 V up to 18 V. It boasts a precise tolerance of ±1%, meeting tight accuracy requirements for sophisticated electronic circuits. The TLVH431AQDBZR can handle output currents of up to 70 mA, and the cathode can withstand up to 100 mA. The chip meets stringent RoHS3 compliance standards, indicating lead-free construction and eco-friendly manufacturing. Its low-temperature drift guarantees stable performance from -40°C to 125°C, while the small SOT-23-3 footprint minimizes PCB area. Surface-mount technology allows for automated high-speed production and dense PCB layouts.
TLVH431AQDBZR Quality and Safety Features
The TLVH431AQDBZR is manufactured to rigorous Texas Instruments quality controls, ensuring reliability and safety in critical applications. Extended operating temperature capability and robust thermal design protect the device against overheating and other environmental hazards. Built-in ESD protection and high-quality encapsulation reduce risk from static and moisture ingress.
TLVH431AQDBZR Compatibility
As a standard-bearer in the voltage reference category, the TLVH431AQDBZR is pin- and function-compatible with many competing industry devices in the SOT-23-3 format. It’s suitable for replacing or designing in many analog and digital systems requiring precise voltage control.
TLVH431AQDBZR Datasheet PDF
For comprehensive design and technical details, the most authoritative and up-to-date datasheet is available on our website. We strongly recommend downloading the latest TLVH431AQDBZR datasheet directly from this product page to ensure your application benefits from all available reference information.
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