Nexperia USA Inc. TLVH431NAIDBZRVL

Overview

TLVH431NAIDBZR from Nexperia is an A-grade (±1.0 %) adjustable precision shunt regulator in SOT23 package, configured with normal pinning (REF–K–A), delivering 1.24 V reference voltage with 0.1 Ω dynamic cathode-anode impedance and supporting 0.08–70 mA sink current across –40 °C to +85 °C ambient range. It functions as a programmable voltage reference or shunt element in isolated SMPS feedback loops.

For engineers reviewing the TLVH431NAIDBZR datasheet, TLVH431NAIDBZR pinout, TLVH431NAIDBZR application, or TLVH431NAIDBZR equivalent, this page provides verified pin configuration, thermal derating curves, reference voltage stability over temperature, cathode current vs. cathode-anode voltage behavior, and design-critical impedance and noise characteristics for precision regulation and current sinking.

Technical Context

The TLVH431NAIDBZR implements a three-terminal shunt topology where the REF pin senses voltage via external resistor divider, triggering precise cathode current conduction when input exceeds Vref × (1 + R1/R2) + Iref × R1. Its active output stage delivers sharp turn-on and low dynamic impedance (0.1 Ω typical), enabling stable regulation even under fast load transients.

It operates within a cathode-anode voltage range of 1.24 V to 14 V, with reference voltage tolerance tightened to ±1.0 % at 25 °C and ±1.3 mV max drift over –40 °C to +85 °C. The device maintains sub-0.3 μA reference current and <0.05 μA off-state leakage, critical for low-power biasing and high-impedance sensing circuits.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (3 leads), 1.9 mm × 1.1 mm × 0.9 mm body, standard footprint per Fig. 29 and reflow solder land pattern per Fig. 30.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431NAIDBZR, TLVH431NIDBZR trades 0.5 % reference accuracy for lower unit cost without changing thermal or electrical interface, while TLVH431NAQDBZR extends junction temperature capability at the expense of pin compatibility-making TLVH431NAIDBZR optimal for cost-sensitive industrial designs needing ±1.0 % accuracy at +85 °C ambient.

Availability

TLVH431NAIDBZR is available at Aetrix Electronics and suitable for isolated SMPS feedback, precision current sinking, programmable shunt regulation, and low-power voltage reference applications requiring stable component supply across industrial temperature ranges.

Supply support for TLVH431NAIDBZR 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 leading semiconductor manufacturer specializing in high-performance, reliable discrete and analog components, with global manufacturing and quality systems certified to ISO 9001 and IATF 16949 standards.

The TLVH431N family belongs to Nexperia's precision analog portfolio, engineered specifically for industrial and commercial power management applications demanding tight reference accuracy, low noise, and robust thermal performance in compact SOT23 packaging.

FAQ

What is the maximum cathode-anode voltage rating for TLVH431NAIDBZR?

The absolute maximum cathode-anode voltage (VKA) is 14 V, as specified in Table 6 (Limiting Values). Operation beyond this voltage risks permanent device damage. Recommended operating conditions constrain VKA to 14 V maximum, with stable regulation achievable from Vref (1.24 V) up to that limit using external resistors.

Does TLVH431NAIDBZR require an external capacitor for stability?

Stability depends on load capacitance and ESR: Figure 20 shows stable operation up to 100 nF with appropriate ESR, but verification is required across operating current and temperature. The device does not mandate a capacitor, but adding 1–10 nF ceramic capacitor near the cathode improves transient response and noise immunity in sensitive feedback paths.

How does the reference current (Iref) affect resistor-divider design?

Iref (0.19–0.30 μA typical) flows into the REF pin and adds error to the divider ratio. To limit error to <0.1 %, total divider resistance should be ≤100 kΩ; for ultra-precision use, ≤10 kΩ is recommended. Higher resistance values increase sensitivity to Iref-induced offset and PCB leakage.

Can TLVH431NAIDBZR replace a Zener diode directly?

Yes-it functions as a 3-terminal active Zener replacement with superior characteristics: sharper knee, lower dynamic impedance (0.1 Ω vs. 10–100 Ω), programmable voltage, and tighter tolerance. Direct substitution requires connecting REF to the divider midpoint, K to the regulated rail, and A to ground-no additional components needed beyond the two external resistors.