Nexperia USA Inc. TLVH431NCDBZRVL

Overview

TLVH431NCDBZR from Nexperia is a three-terminal adjustable precision shunt regulator with 1.5 % reference voltage tolerance, 1.24 V to 14 V programmable output range set by two external resistors, and 0.1 Ω typical dynamic cathode-anode impedance. It operates across 0 °C to 70 °C ambient temperature and serves as a precision voltage reference or current sink in isolated SMPS feedback paths.

For engineers reviewing the TLVH431NCDBZR datasheet, TLVH431NCDBZR pinout, TLVH431NCDBZR application, or TLVH431NCDBZR equivalent, this device supports stable shunt regulation, low-noise constant-current sinking, and high-accuracy voltage setting in space-constrained power management circuits where SOT23 footprint and thermal stability are critical.

Technical Context

The TLVH431NCDBZR implements an internal bandgap reference and transconductance amplifier driving an NPN pass transistor, enabling sharp turn-on and precise regulation at cathode currents from 80 μA to 70 mA. Its functional diagram shows REF, K (cathode), and A (anode) terminals forming a 3-terminal shunt topology that replaces Zener diodes in precision applications.

It delivers 1.24 V nominal reference voltage with ±15 mV (1.5 %) initial tolerance at 25 °C and maintains <10 mV drift over 0 °C to 70 °C. Dynamic impedance remains ≤0.15 Ω below 1 kHz, supporting stable operation with load capacitances down to 10 nF when properly decoupled per Figure 20 test conditions.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (3 leads), 2.8 mm × 1.4 mm × 1.1 mm body size, with normal pinning configuration (REF–K–A).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431NCDBZR, TLVH431ACDBZR improves reference accuracy by 0.5 % at identical temperature range, while TLVH431NIDBZR extends operational reliability to –40 °C without changing tolerance-enabling drop-in upgrades for thermal robustness or precision-critical designs.

Availability

TLVH431NCDBZR is available at Aetrix Electronics and suitable for shunt voltage regulation, precision current limiting, isolated SMPS feedback, and constant-current sink applications requiring stable component supply, consistent parametric performance, and SOT23 footprint compatibility.

Supply support for TLVH431NCDBZR 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 delivering high-performance, reliable logic, discrete, and MOSFET devices optimized for efficiency, miniaturization, and manufacturability in high-volume applications.

The TLVH431N family targets precision analog power management in cost-sensitive consumer, computing, and industrial systems, emphasizing low-noise shunt regulation, wide programmability, and robust SOT23 integration.

FAQ

What is the minimum cathode current required for regulation?

The TLVH431NCDBZR requires a minimum cathode current (IK(min)) of 55 μA to maintain regulation, verified at VKA = Vref across 0 °C to 70 °C. Below this threshold, the device exits active regulation and behaves as an open circuit; design must ensure IK ≥ 80 μA under worst-case conditions including resistor tolerance and temperature drift.

Can TLVH431NCDBZR replace a Zener diode directly?

Yes-TLVH431NCDBZR functions as a 3-terminal active Zener replacement with superior accuracy, lower dynamic impedance (0.1 Ω vs. typical 10–100 Ω for Zeners), and programmable voltage. Unlike passive Zeners, it requires a reference resistor network but delivers sharper knee characteristics and stable performance across temperature and current ranges.

How does the mirrored pinning variant differ?

TLVH431NCDBZR uses normal pinning (REF–K–A), whereas variants ending in MQDBZR use mirrored pinning (K–REF–A). Pin 1 and Pin 2 are swapped; incorrect PCB layout causes immediate functional failure. Always verify marking code (8M% for TLVH431NCDBZR) and match footprint to specified pinning in Table 3 before placement.

What is the maximum power dissipation at 25 °C?

At Tamb = 25 °C on a standard FR4 PCB with single-sided copper, TLVH431NCDBZR has a maximum total power dissipation (Ptot) of 350 mW. This corresponds to ~5 V × 70 mA or 14 V × 25 mA; thermal derating applies above 25 °C per Figure 2, requiring layout attention to anode pad area if operating near limits.