TLVH431BQLPR Equivalent & Substitute Parts

Part Overview

The TLVH431BQLPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This device provides a fixed output voltage of 1.24V with adjustable capability up to 18V, delivering up to 70mA output current with ±0.5% tolerance. The part is packaged in TO-92-3 (through-hole) configuration and operates across the industrial temperature range of -40°C to 125°C.

This part carries a Last Time Buy status, indicating it is being phased out by the manufacturer. Identifying suitable substitute components is essential for design continuity and long-term supply chain reliability.

Substiute Parts

TLVH431BQLPR

Texas InstrumentsIn Stock: 2768TLVH431BQLPR Datasheet

Current PartRFQ

TLV431BQDBZR

Texas InstrumentsIn Stock: 76406TLV431BQDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLVH431BQLPR is determined by the following core electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reference type must be Shunt
• Output type must be Adjustable
• Minimum output voltage: 1.24V (fixed reference point)
• Tolerance: ±0.5%
• Cathode current: 100µA
• Operating temperature range: -40°C to 125°C

Mechanical Compatibility Criteria:

• Mounting type and package configuration must be compatible with the application circuit board design
• Base product number alignment (TLV431 series)

The identified substitute part TLV431BQDBZR shares the same electrical specifications (reference type, output voltage, tolerance, and operating temperature) and base product number. However, it differs in packaging (SOT-23-3 surface mount versus TO-92-3 through hole) and maximum output current rating (15mA versus 70mA). These differences require evaluation based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

For TLVH431BQLPR Replacement:

The TLV431BQDBZR is the manufacturer-recommended substitute from Texas Instruments. Both devices share identical electrical core specifications: shunt reference type, adjustable output topology, 1.24V fixed reference point, ±0.5% tolerance, and 100µA cathode current across the full -40°C to 125°C operating range. Both are ROHS3 compliant.

Critical Differences Requiring Application Assessment:

1. Output Current Rating: The TLVH431BQLPR supports 70mA maximum output current, while the TLV431BQDBZR is rated for 15mA. Applications requiring output currents exceeding 15mA cannot use the substitute without circuit redesign.

2. Maximum Output Voltage: The TLVH431BQLPR reaches 18V maximum, while the TLV431BQDBZR is limited to 6V. Applications requiring output voltages above 6V require alternative solutions.

3. Package and Mounting: The TLVH431BQLPR uses through-hole TO-92-3 packaging for PCB insertion mounting. The TLV431BQDBZR uses surface-mount SOT-23-3 packaging. PCB layout and assembly process compatibility must be confirmed.

4. Product Status: The TLV431BQDBZR carries Active status, ensuring long-term availability and supply continuity compared to the Last Time Buy status of the main part.

Frequently Asked Questions (FAQ)

Q: Can TLV431BQDBZR directly replace TLVH431BQLPR in all applications?

A: Direct replacement is possible only if the application meets all of the following conditions: output current requirement does not exceed 15mA, maximum output voltage requirement does not exceed 6V, and the PCB design accommodates surface-mount SOT-23-3 packaging. If any condition is not met, circuit redesign or alternative components are required.

Q: What is the significance of the different maximum output voltage ratings (18V vs 6V)?

A: The maximum output voltage rating defines the upper limit of the adjustable reference voltage that can be set in the application circuit. The TLVH431BQLPR supports higher voltage applications up to 18V, while the TLV431BQDBZR is limited to 6V. Selection depends on the specific voltage regulation requirement of the application.

Q: Are there package compatibility considerations?

A: Yes. The TLVH431BQLPR is a through-hole component (TO-92-3) designed for insertion into PCB holes, while the TLV431BQDBZR is a surface-mount component (SOT-23-3) designed for reflow soldering. These require different PCB layouts, assembly equipment, and manufacturing processes. Compatibility must be confirmed with your PCB design and manufacturing capabilities.

Q: Do both parts meet the same compliance and certification standards?

A: Yes. Both the TLVH431BQLPR and TLV431BQDBZR are ROHS3 compliant and REACH unaffected. Both carry EAR99 ECCN classification and share the same HTSUS code (8542.39.0001).

Q: Why is the TLVH431BQLPR marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this product. Existing inventory may be available for a limited time, but long-term supply cannot be guaranteed. Planning for transition to active alternatives such as the TLV431BQDBZR is recommended for new designs or production continuity.