Nexperia USA Inc. PLVA659A/ZLR

Overview

PLVA659A from Nexperia is a low-voltage avalanche regulator diode in SOT23 (TO-236AB) package, designed for precision voltage stabilization at 5.90 V nominal working voltage with ±0.20 V tolerance, 2.40 mV/K temperature coefficient, and 0.9 nA reverse current at 50 % VZ. It delivers low-noise regulation in CMOS RAM backup and smoke detector relay circuits.

For engineers reviewing the PLVA659A datasheet, PLVA659A pinout, PLVA659A application, or PLVA659A equivalent, key selection criteria include its 5.70–6.10 V working voltage range, 100 Ω dynamic resistance at 250 µA, hard breakdown knee, sub-1 nA leakage at low bias, and suitability for low-power, low-noise analog reference designs.

Technical Context

The PLVA659A operates as a two-terminal shunt voltage reference using controlled avalanche breakdown in silicon, optimized for stable regulation at low currents (10 µA to 1 mA). Its hard breakdown knee and low dynamic impedance (100 Ω typical) enable tight line regulation (≤0.1 V) across operating current changes.

Thermal performance is defined by junction-to-ambient thermal resistance of 500 K/W on FR4 PCB, with maximum junction temperature limited to 150 °C. The device exhibits a positive temperature coefficient of +2.40 mV/K, supporting predictable drift compensation in precision analog circuits.

Key Specifications

Pinout & Package

PLVA659A is housed in a surface-mount SOT23 (TO-236AB) plastic package with three leads, where Pin 2 is internally not connected and must remain unconnected in layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-voltage shunt reference applications.

Compared with BZX84-C5V6 and TL431ACDBVR, PLVA659A uniquely balances ultra-low leakage (0.9 nA), tight voltage tolerance (±0.20 V), and low noise (≤1.0 µV/√Hz) in a passive 2-pin SOT23 package-making it optimal for space-constrained, battery-powered precision analog systems.

Availability

PLVA659A is available at Aetrix Electronics and suitable for CMOS RAM backup circuits, smoke detector relay protection, and low-noise analog reference designs requiring stable component supply, consistent parametric binning, and long-term production continuity.

Supply support for PLVA659A 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.

The PLVA6xxA series belongs to Nexperia's precision low-voltage regulator diode product line, engineered specifically for ultra-low-power, low-noise voltage reference and clamping in space-constrained portable and safety-critical systems.

FAQ

What is the maximum reverse voltage the PLVA659A can withstand continuously?

The PLVA659A has no specified continuous reverse voltage rating beyond its nominal working voltage of 5.90 V. Its absolute maximum non-repetitive peak reverse power dissipation is 30 W at 150 °C for 100 µs pulses, but sustained reverse bias above V_Z will cause uncontrolled conduction and thermal runaway. Continuous operation must remain within the 5.70–6.10 V working range at rated current.

Can PLVA659A replace a standard 5.6 V Zener diode in existing designs?

PLVA659A is not a direct replacement for a 5.6 V Zener due to its higher nominal voltage (5.90 V), tighter tolerance (±0.20 V vs. typical ±5 %), and significantly lower leakage (0.9 nA vs. ~100 nA). Circuit revalidation is required-especially in feedback loops or bias networks where 300 mV offset and order-of-magnitude leakage reduction affect stability and quiescent current.

Is PLVA659A qualified for automotive applications?

No. Per Nexperia's revision history (Rev. 4, Jan 2023), the PLVA659A is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, Nexperia offers separate -Q qualified variants-consult their official automotive portfolio for approved alternatives.

How does the 2.40 mV/K temperature coefficient impact circuit design?

The +2.40 mV/K coefficient means output voltage increases by 2.4 mV per degree Celsius rise in junction temperature. In a 0–70 °C ambient range, this causes up to 168 mV drift. Designers must either compensate via complementary components (e.g., NTC thermistors), restrict self-heating (limit I_Z ≤ 250 µA), or calibrate out drift in systems requiring <0.1 % voltage stability.