Nexperia USA Inc. TLVH431NQDBZR-QVL

Overview

TLVH431NQDBZR-Q from Nexperia is a three-terminal adjustable precision shunt regulator with 1.5 % reference voltage tolerance, -40 °C to 125 °C operating temperature range, and SOT23 package. It sets output voltage from 1.24 V to 14 V via two external resistors, delivers 0.08–70 mA sink current, and features 0.1 Ω typical dynamic cathode-anode impedance for stable feedback in automotive SMPS designs.

For engineers reviewing the TLVH431NQDBZR-Q datasheet, TLVH431NQDBZR-Q pinout, TLVH431NQDBZR-Q application, or TLVH431NQDBZR-Q equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, mirrored pinning (K-REF-A), 125 °C max ambient rating, and low 0.19–0.30 μA reference current for high-impedance bias networks.

Technical Context

The TLVH431NQDBZR-Q implements a bandgap-based precision shunt reference with active output circuitry enabling sharp turn-on characteristics and low output impedance. Its functional diagram shows REF, K (cathode), and A (anode) terminals forming a programmable voltage-controlled current sink.

It operates as a two-resistor-adjustable shunt regulator where V_OUT = V_REF × (1 + R1/R2) + I_REF × R1. The device maintains regulation across 0.08–70 mA cathode current and supports stable operation up to 125 °C ambient with verified load capacitance boundaries per Figure 20.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) surface-mount plastic package with 3 leads; 1.9 mm × 1.1 mm body, 0.95 mm height, and standard reflow footprint per Figure 30.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431NQDBZR-Q, the A-grade variant improves initial V_REF accuracy by 0.5 % but adds no thermal or noise benefit, while the tape-and-reel version offers logistics efficiency without altering circuit performance or layout.

Availability

TLVH431NQDBZR-Q is available at Aetrix Electronics and suitable for automotive power management, isolated SMPS feedback, and precision current control applications requiring stable component supply across extended temperature ranges.

Supply support for TLVH431NQDBZR-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 solutions, with leadership in automotive-qualified components.

The TLVH431N-Q family targets automotive and industrial shunt regulation needs, delivering AEC-Q100-compliant precision references optimized for space-constrained, thermally demanding environments.

FAQ

What is the pin configuration of TLVH431NQDBZR-Q?

TLVH431NQDBZR-Q uses mirrored pinning in SOT23: Pin 1 = K (cathode), Pin 2 = REF (reference), Pin 3 = A (anode). This differs from standard TLVH431N variants (REF-K-A) and must be accounted for in PCB layout and schematic symbol assignment.

How does TLVH431NQDBZR-Q achieve stability with capacitive loads?

Stability depends on load capacitance and ESR; Figure 20 specifies minimum/maximum CL boundaries (e.g., 1–100 nF at 25 °C). Mounting the capacitor within 2 mm of the device and selecting low-ESR ceramic types ensures phase margin >45° across -40 °C to 125 °C.

Can TLVH431NQDBZR-Q replace a Zener diode directly?

Yes-it functions as a 3-terminal Zener replacement with superior performance: sharper knee, lower dynamic impedance (0.1 Ω vs. 5–50 Ω), and programmable voltage. External resistor values must be recalculated using V_OUT = V_REF(1 + R1/R2) + I_REFR1.

What is the maximum power dissipation at 125 °C ambient?

At T_AMB = 125 °C, maximum power dissipation is 350 mW on FR4 PCB (standard footprint), derating linearly from 950 mW at 25 °C per Figure 2. This limits usable I_K × V_KA product to ~350 mW under worst-case thermal conditions.