NXP Semiconductors TLVH431DQDBZR,215

Overview

TLVH431DQDBZR,215 from NXP Semiconductors is a low-voltage, three-terminal adjustable precision shunt regulator with 0.75 % reference voltage tolerance (1231–1249 mV at 25 °C), AEC-Q100 Grade 1 qualification (−40 °C to +125 °C), and 0.1 Ω typical dynamic cathode-anode impedance. It sinks 0.08 mA to 70 mA and enables programmable output voltages from 1.24 V to 18 V using two external resistors-used in automotive SMPS feedback loops, precision current sinks, and isolated voltage regulation.

For engineers reviewing the TLVH431DQDBZR,215 datasheet, TLVH431DQDBZR,215 pinout, TLVH431DQDBZR,215 application, or TLVH431DQDBZR,215 equivalent, key selection considerations include its D-grade 0.75 % Vref accuracy over −40 °C to +125 °C, SOT23 normal pinning, 4 mV max temperature drift, and suitability for high-reliability automotive power management where Zener replacement with tighter tolerance and lower impedance is required.

Technical Context

The TLVH431DQDBZR,215 implements an internal bandgap reference and transconductance amplifier driving an NPN output stage, enabling sharp turn-on and stable shunt regulation across its full 1.24 V–18 V output range. Its architecture supports operation with load capacitances down to ~1 nF while maintaining stability under varying temperature and current conditions.

Designed for automotive-grade reliability, it features AEC-Q100 Grade 1 qualification, 4 kV HBM ESD rating, and thermal performance validated up to 125 °C ambient with Rth(j-a) ≤ 320 K/W on standard FR4 PCBs. The device operates with reference current as low as 0.19 µA and maintains <10 mV Vref variation over its full temperature range.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package, 3-lead, normal pinning configuration per Table 5 - compatible with standard reflow and wave soldering footprints (see Fig 32/33).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431AQDBZR and TL431BIDR, TLVH431DQDBZR,215 delivers superior accuracy (0.75 % vs. 1 % or 0.5 %), full automotive temperature coverage (−40 °C to +125 °C), and lower dynamic impedance-making it the optimal choice for safety-critical, high-stability automotive power regulation where long-term drift and thermal robustness are paramount.

Availability

TLVH431DQDBZR,215 is available at Aetrix Electronics and suitable for automotive power management, precision current control, and isolated feedback applications requiring stable component supply with full AEC-Q100 traceability and long-lifecycle support.

Supply support for TLVH431DQDBZR,215 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

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in automotive-grade analog and power management ICs.

The TLVH431 family was designed specifically for high-accuracy, low-drift shunt regulation in automotive power systems-addressing demand for AEC-Q100-qualified alternatives to Zener diodes with programmable output and improved thermal stability.

FAQ

What is the reference voltage tolerance and temperature range for TLVH431DQDBZR,215?

The TLVH431DQDBZR,215 has a 0.75 % reference voltage tolerance (1231–1249 mV at 25 °C) and is rated for operation from −40 °C to +125 °C, meeting AEC-Q100 Grade 1 requirements. This specification is confirmed in Table 10 of the NXP datasheet for the D-grade variant, ensuring high-precision regulation in automotive under-hood environments where thermal stability is critical. TLVH431DQDBZR,215 maintains ≤4 mV Vref variation across its full temperature range.

What package type and pin configuration does TLVH431DQDBZR,215 use?

TLVH431DQDBZR,215 uses the SOT23 (TO-236AB) package with normal pinning: Pin 1 = REF, Pin 2 = K (cathode), Pin 3 = A (anode). This is explicitly stated in Table 1 and Table 5 of the NXP datasheet for all TLVH431xQDBZR types without "MQ" in the suffix. The marking code *SE further confirms this SOT23 normal-pinning variant.

How does TLVH431DQDBZR,215 differ from standard TL431-type shunt regulators?

TLVH431DQDBZR,215 offers lower minimum operating voltage (1.24 V vs. 2.495 V for TL431), tighter 0.75 % Vref tolerance, AEC-Q100 Grade 1 qualification, and lower 0.1 Ω dynamic impedance. Unlike legacy TL431 parts, it supports low-voltage systems and automotive applications directly-without external level-shifting or derating. TLVH431DQDBZR,215 also features improved thermal drift (≤4 mV) and higher ESD robustness (4 kV HBM).

Can TLVH431DQDBZR,215 be used in isolated feedback circuits for SMPS?

Yes-TLVH431DQDBZR,215 is explicitly recommended for isolated feedback loops in Switch Mode Power Supplies, including low-output-voltage SMPS (Figure 29). Its low reference current (0.19–0.30 µA), sharp turn-on, and stability with small load capacitances (<10 nF) make it ideal for optocoupler-coupled secondary-side regulation. TLVH431DQDBZR,215 maintains accuracy and phase margin across −40 °C to +125 °C, critical for automotive SMPS reliability.

What is the maximum cathode current and power dissipation for TLVH431DQDBZR,215?

TLVH431DQDBZR,215 supports a cathode current range of 0.08 mA to 70 mA and has a maximum total power dissipation of 390 mW at Tamb ≤ 25 °C on standard FR4 PCB (Table 6). Derating applies above 25 °C: e.g., ~200 mW at 85 °C ambient (Fig 2). These limits ensure safe operation in automotive shunt and current-sink roles without heatsinking when layout follows NXP's recommended footprint (Fig 32).