STMicroelectronics VNQ600A

Overview

VNQ600A from STMicroelectronics is a quad-channel high-side solid-state relay (HSD) built using VIPower M0-3 technology, integrating two VND600 dies in a single SO-28 double-island package. It delivers 25 A DC short-circuit current per channel, features CMOS-compatible inputs, proportional analog current sense outputs (K = 3300–6000 A/A), and comprehensive protection including thermal shutdown (150 °C), undervoltage (4 V typ) and overvoltage (36 V) shutdown, reverse battery protection, and loss-of-ground detection - deployed in automotive body control modules for driving solenoids, lamps, and actuators.

For engineers reviewing the VNQ600A datasheet, VNQ600A pinout, VNQ600A application, or VNQ600A equivalent, this page provides verified electrical parameters, validated SO-28 double-island pin mapping, confirmed protection behavior under ISO 7637-2 transients, and real-world design guidance for ground-network implementation and current-sense calibration.

Technical Context

The VNQ600A implements four independent high-side switches with integrated drivers, logic-level input decoding, and per-channel analog current sense circuitry delivering ISENSE proportional to IOUT across -40 °C to +150 °C. Each channel includes active current limiting (25 A nominal), thermal foldback, and output voltage clamping (Vclamp = 41–55 V).

Protection architecture combines dual-threshold overvoltage shutdown (VOV = 36 V), undervoltage lockout (VUSD = 4 V typ), and thermal shutdown with hysteresis (TTSD = 150–200 °C, TR = 135 °C). The device detects loss of ground via dedicated IGND monitoring and supports reverse-battery resilience through external DGND/RGND networks per ST's application schematic.

Key Specifications

Pinout & Package

Package: SO-28 double-island (2 × 14-pin islands), FR-4 compatible, 0.5 cm² Cu pad per island recommended for thermal management (R_thj-amb = 60 °C/W @ one chip ON).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad high-side driver applications.

Compared with STSPIN250 and TPS27082L, the VNQ600A uniquely delivers 25 A per channel, four independent analog current sense outputs, dual-island SO-28 packaging for fault containment, and full ISO 7637-2 Class C immunity - making it irreplaceable for high-power automotive body electronics requiring embedded diagnostics and robustness.

Availability

VNQ600A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and off-highway equipment load management requiring stable component supply, long-lifecycle support, and traceable sourcing for safety-critical functions.

Supply support for VNQ600A 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 qualification expertise.

The VNQ600A belongs to ST's VIPower family of intelligent power switches, designed specifically for high-reliability automotive load driving with integrated diagnostics, protection, and system-level fault resilience.

FAQ

What is the maximum continuous output current per channel?

The VNQ600A supports 15 A continuous output current per channel at T_lead = 25 °C with adequate PCB copper area (0.5 cm² per island). Derating applies above 25 °C ambient: R_thj-amb = 60 °C/W for one channel ON, dropping to 46 °C/W for two channels ON on the same island. Full 25 A rating applies only during short-circuit events before thermal shutdown activates.

How does the current sense output scale with load current?

Each CURRENT SENSE pin delivers I_SENSE = I_OUT/K, where K ranges from 3300 A/A (min) to 6000 A/A (max) depending on I_OUT and temperature. At I_OUT = 0.35 A and T_j = -40 °C to +150 °C, K = 3300–6000; at I_OUT = 15 A, K = 4150–5750. V_SENSE reaches 4 V maximum with R_SENSE = 10 kΩ.

Can VNQ600A operate with a single V_CC supply?

Yes - V_CC1,2 and V_CC3,4 pins may be tied together to a common 5.5–36 V rail. However, keeping them separate enables fault isolation: if one island fails (e.g., overtemperature), the other remains operational. ST recommends separate V_CC routing for critical redundancy applications like dual-brake circuits or redundant lighting control.

What external components are mandatory for reverse battery protection?

A series diode (DGND) in the ground path is mandatory for reverse battery protection, per ST's Application Schematic (page 9). A parallel 1 kΩ resistor (RGND) is required only when driving inductive loads. The DGND diode must be rated for ≥200 mA reverse ground current and placed upstream of all GND pins. No additional TVS or clamp diodes are needed on V_CC due to internal 41–55 V overvoltage clamp.