Nexperia USA Inc. TLVH431NAIDBZR-QVL

Overview

TLVH431NAIDBZR-Q from Nexperia is an A-grade adjustable precision shunt regulator in SOT23 package, featuring 1.0 % reference voltage tolerance (1228–1252 mV at 25 °C), −40 °C to +85 °C operating temperature range, and 0.1 Ω typical dynamic cathode-anode impedance. It functions as a programmable voltage reference or current sink in automotive feedback loops and precision power regulation.

For engineers reviewing the TLVH431NAIDBZR-Q datasheet, TLVH431NAIDBZR-Q pinout, TLVH431NAIDBZR-Q application, or TLVH431NAIDBZR-Q equivalent, this device supports stable 1.24 V–14 V output programming with two external resistors, delivers 0.08–70 mA sink current, and meets AEC-Q100 Grade 1 qualification for automotive use.

Technical Context

The TLVH431NAIDBZR-Q implements a three-terminal shunt topology with internal bandgap reference and active error amplifier, enabling sharp turn-on characteristics and low output noise. Its functional diagram shows REF, K (cathode), and A (anode) terminals forming a closed-loop control path where cathode current adjusts to maintain V_REF × (1 + R1/R2) at the output node.

It operates within specified thermal stability limits across −40 °C to +85 °C, with reference voltage drift of ≤ ±1.3 mV over that range and ΔV_REF/ΔV_KA of −0.5 to −2.7 mV/V. The device achieves 0.19–0.30 μA reference current and maintains stability with load capacitance up to 10 nF under worst-case ESR conditions.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (TO-236AB), 3-lead, normal pinning configuration per Table 3 and Figure 29.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable shunt regulator applications.

Compared with TLVH431NAIDBZR-Q, TLVH431NIDBZR-Q trades 0.5 % reference accuracy for broader commercial availability, while TLVH431ACDBZR sacrifices automotive qualification to reduce cost-neither offers the combined A-grade tolerance and Grade 1 qualification of the original part.

Availability

TLVH431NAIDBZR-Q is available at Aetrix Electronics and suitable for automotive power supplies, isolated feedback circuits, and precision current sources requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TLVH431NAIDBZR-Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET devices, with strong emphasis on automotive and industrial applications.

The TLVH431N-Q family belongs to Nexperia's precision analog portfolio, designed specifically for AEC-Q100-compliant shunt regulation in automotive power conversion and sensing systems.

FAQ

What is the minimum cathode current required for regulation?

The TLVH431NAIDBZR-Q requires a minimum cathode current (I_K(min)) of 55 µA to maintain regulation, verified across −40 °C to +85 °C. This value ensures reliable turn-on even at low ambient temperatures and high source impedances, making it suitable for high-resistance feedback networks in isolated converters.

How does the mirrored vs. normal pinning affect PCB layout?

TLVH431NAIDBZR-Q uses normal pinning (REF–K–A on pins 1–2–3), unlike MQDBZR variants with mirrored pinning (K–REF–A). Using the wrong footprint causes open-circuit or short-circuit failure. Always verify marking code "8S%" and match land pattern to SOT23 normal pinning in Figure 29 and Table 3.

Can this device replace a Zener diode in existing designs?

Yes-TLVH431NAIDBZR-Q provides sharper turn-on, lower dynamic impedance (0.1 Ω vs. typical Zener's >10 Ω), and programmable voltage (1.24–14 V) versus fixed Zener values. It requires only two external resistors and draws sub-0.3 µA reference current, enabling direct drop-in replacement where board space and accuracy allow.

What is the maximum stable load capacitance?

Stable operation is confirmed with up to 10 nF load capacitance when placed close to the device, per Figure 20 test setup. Stability depends on capacitor ESR and operating current; designs must verify phase margin across full temperature and current ranges using the test circuits in Figures 21–22.