STMicroelectronics VNQ7040AYTR

Overview

VNQ7040AYTR from STMicroelectronics is a quad-channel smart high-side power switch IC in PowerSSO-36 package, designed for 12 V automotive loads with CMOS-compatible 3 V/5 V control inputs. It delivers 40 mΩ typical on-state resistance per channel, 34 A current limiting, and integrated analog feedback via multiplexed MultiSense pin for load current, supply voltage, and die temperature sensing.

For engineers reviewing the VNQ7040AYTR datasheet, VNQ7040AYTR pinout, VNQ7040AYTR application, or VNQ7040AYTR equivalent, this page details its diagnostic architecture (OFF-state open-load, short-to-VCC, thermal shutdown), protection suite (undervoltage lockout, overvoltage clamp, configurable latch-off), and evaluation board integration path for rapid prototyping of automotive body electronics.

Technical Context

The VNQ7040AYTR implements VIPower M0-7 technology to combine high-side switching, real-time analog diagnostics, and fault management in a single die. Its four independent channels each feature hysteresis-equipped CMOS-compatible inputs, dedicated FaultRST pin for latched fault recovery, and S_EN-controlled activation of the shared MultiSense output.

Diagnostic multiplexing uses SEL0–SEL2 to select between proportional load current (±5% accuracy), VCC feedback, and junction temperature sensing on the same analog output pin. Protection logic includes self-limiting thermal transients, reverse-battery immunity via controlled self-turn-on, and loss-of-ground/VCC detection - all without external components beyond RSENSE.

Key Specifications

Availability

VNQ7040AYTR is available at Aetrix Electronics and suitable for automotive body control modules, LED headlight drivers, and HVAC actuator interfaces requiring stable component supply, long lifecycle support, and AEC-Q100-compliant high-side switching.

Supply support for VNQ7040AYTR 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 broad automotive qualification coverage.

VNQ7040AYTR belongs to ST's VIPower® M0-7 family - engineered specifically for intelligent high-side driving in 12 V automotive systems, emphasizing integrated protection, low quiescent current, and multi-function analog diagnostics to reduce system-level component count.

FAQ

What is the function of the FaultRST pin?

The FaultRST pin is an active-low input that unlatches outputs after overtemperature or overload faults. When held low, it forces auto-restart mode instead of latched shutdown. It requires a CMOS-compatible 3 V/5 V signal and must be pulled high during normal operation to enable latch-off behavior per device configuration.

How does the MultiSense pin deliver multiple diagnostics?

The MultiSense pin outputs a current proportional to one of three internal signals - load current, VCC, or junction temperature - selected by SEL0–SEL2 address lines. S_EN must be high to enable output; when low, the pin is disabled to conserve power during sleep modes or allow sharing across multiple devices using external multiplexing.

Can VNQ7040AYTR drive inductive loads like fuel injectors?

Yes - VNQ7040AYTR is qualified for automotive inductive loads. Its integrated clamp diode, fast thermal transient limiting, and 34 A current limit protect against back-EMF spikes. The device meets ISO 7637-2 pulse 5a/b for load dump and supports PWM switching up to 2 kHz with stable thermal performance on the reference PCB layout.

What is the role of the IN_PullUP pin on the EV-VNQ7040AY board?

The IN_PullUP pin connects to an optional external pull-up resistor to improve OFF-state open-load detection sensitivity. When enabled, it raises the input threshold during off-state, allowing reliable detection of disconnected loads (e.g., broken lamp filaments) without false triggers from leakage currents or noise on floating inputs.