TLVH431CPK

Overview

The TLVH431CPK is a low-power adjustable precision shunt regulator manufactured by Texas Instruments. It functions as a three-terminal voltage reference with an adjustable output voltage range spanning from 1.24 V to 18 V. The device guarantees thermal stability across its operating temperature range, featuring a maximum temperature coefficient of 100 ppm/°C. It supports a wide cathode current range from 100 µA to 60 mA, ensuring stable operation in power-restricted designs. The component is housed in a SOT-89-3 surface-mount package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability ranging from 1.24 V to 18 V via external resistor divider
• Low operating current consumption suitable for battery-operated and power-constrained applications
• Guaranteed thermal stability over the entire specified operating temperature range
• High sink current capability up to 60 mA with low dynamic impedance

Applications

• Battery chargers
• Switch mode power supplies
• Data acquisition systems
• Energy management circuits

Procurement Notes

Verify the specific accuracy grade (e.g., 0.25%, 0.5%, 1%) and package variant suffix against the official Texas Instruments datasheet, as the base model number may correspond to multiple sub-types with different performance specifications. Confirm that the SOT-89-3 package matches the design constraints. Ensure compliance with RoHS standards and check for automotive qualification requirements if applicable to the target application environment.

Selection Notes

Select this component when a low-cost, adjustable precision reference is required for space-constrained designs. It is suitable for applications demanding low quiescent current and wide input voltage ranges. Consider the thermal coefficient and initial accuracy requirements to determine the appropriate sub-type. Ensure the cathode current requirements fall within the 100 µA to 60 mA operational window for optimal regulation performance.

Part Context

The TLVH431 series represents a family of low-power adjustable shunt voltage references designed for general-purpose use. It serves as a cost-effective alternative to fixed voltage references in programmable regulator circuits. The device integrates a bandgap reference and error amplifier to provide precise voltage control. It is commonly used in feedback loops for switching regulators and linear power supplies where accurate voltage monitoring and regulation are critical.

Replacement Considerations

Direct pin-compatible replacements include the TL431 series from Texas Instruments and compatible parts from STMicroelectronics such as the TLVH431AIL3T or TLVH431BIL3T. Verify that substitute components meet the same voltage range, current capability, and temperature coefficient specifications before integration.