STMicroelectronics VN751PT

Overview

VN751PT from STMicroelectronics is a monolithic high-side power switch IC built on VIPower M03 technology, designed to drive grounded loads in industrial control systems. It operates from 8 V to 36 V supply, delivers up to 2.5 A output current, features 60 mΩ R_DS(on), CMOS-compatible input, and integrated open-drain status output - enabling real-time fault reporting in programmable logic controller (PLC) I/O modules.

For engineers reviewing the VN751PT datasheet, VN751PT pinout, VN751PT application, or VN751PT equivalent, key selection criteria include its active V_DS clamp for fast demagnetization of 6 mH inductive loads, thermal shutdown with 150 °C trip point and 7 °C hysteresis, undervoltage/overvoltage protection thresholds (3–5.5 V / 36 V), and compliance with IEC 61000-4-4 up to 4 kV EFT.

Technical Context

The VN751PT implements an intelligent high-side driver architecture with active current limitation, thermal foldback, and automatic restart after overload recovery. Its internal V_DS clamp circuit actively regulates output voltage during inductive turn-off to dissipate energy across both load resistance and internal switch, supporting single-pulse demagnetization energy up to 5.5 J at V_CC = 24 V and T_AMB = 125 °C.

Protection logic integrates loss-of-ground detection, reverse polarity resilience via external RGND resistor design, and status pin feedback with 0.5 V low-level output at 1.6 mA sink current. Input hysteresis (0.5 V) ensures noise immunity, while VIH/VIL thresholds (3.25 V / 1.25 V) guarantee compatibility with standard 3.3 V/5 V microcontrollers.

Key Specifications

Pinout & Package

Package: PPAK (Power Package) - thermally enhanced surface-mount package with exposed drain pad for direct PCB copper thermal coupling; compliant with ECOPACK® environmental standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STVN7012AJR and TPS27082L, the VN751PT uniquely combines industrial-grade transient immunity, active inductive demagnetization, and loss-of-ground detection - making it the only choice for safety-critical PLC output stages requiring self-contained fault management.

Availability

VN751PT is available at Aetrix Electronics and suitable for industrial automation, programmable logic controller (PLC) I/O modules, and solenoid-based motion control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for VN751PT 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 solutions with vertical manufacturing capabilities and broad IP portfolio.

The VN751PT belongs to ST's VIPower family of intelligent power switches - engineered specifically for rugged industrial control applications demanding integrated protection, high reliability, and compliance with IEC 61131-2 programmable controller standards.

FAQ

What is the maximum inductive load energy the VN751PT can safely demagnetize?

The VN751PT supports up to 5.5 J of single-pulse demagnetization energy at V_CC = 24 V and T_AMB = 125 °C, as verified in avalanche energy testing per Figure 12 of the datasheet. This value assumes no external freewheeling diode; adding one disables the internal V_DEMAG clamp and shifts energy dissipation entirely to the external component.

How does the loss-of-ground protection function in practice?

When the GND pin disconnects, the device detects absence of return path and forces immediate output shutdown within microseconds, preventing uncontrolled floating output voltage. This behavior is confirmed in Table 9 (Truth Table) under "Undervoltage" and "Overtemperature" rows, and is independent of IN signal state - ensuring fail-safe operation in wiring fault scenarios.

Can the VN751PT drive loads directly from a 48 V supply?

No - the absolute maximum V_CC rating is 45 V (Table 2), and recommended operating range is strictly 8–36 V. Applying 48 V exceeds specification limits and risks permanent damage. For 48 V systems, use a pre-regulator stage or select a higher-voltage-rated part such as the VNQ7E100AJ.

Is the STAT pin compatible with 3.3 V microcontroller inputs?

Yes - the STAT pin is open-drain and rated for 5 V tolerant operation. When pulled up to 3.3 V via external resistor, it reliably reports faults as low-active signals (≤ 0.5 V at 1.6 mA sink), matching standard 3.3 V logic thresholds without level-shifting circuitry.