STMicroelectronics VN750PT

Overview

VN750PT from STMicroelectronics is a high-side power switch IC designed for driving resistive, inductive, or capacitive loads with one side grounded. It features 60 mΩ R_DS(on), 6 A continuous output current, 36 V supply voltage rating, CMOS-compatible input, and integrated open-load detection in both on- and off-states. It is used in automotive body control modules for controlling lamps, solenoids, and actuators.

For engineers reviewing the VN750PT datasheet, VN750PT pinout, VN750PT application, or VN750PT equivalent, key selection criteria include its active current limitation (6–15 A), thermal shutdown with 150°C trip point, reverse battery protection, and PPAK package's 2.1 °C/W junction-to-case thermal resistance for high-power reliability.

Technical Context

The VN750PT implements VIPower® M0-3 technology to integrate power MOSFET, protection logic, and diagnostic circuitry in a single monolithic die. Its architecture includes an active VCC clamp for low-energy spike suppression, dual-mode open-load detection (on-state current threshold ≤200 mA; off-state voltage threshold ≥1.5 V), and ground-loss detection that forces automatic shutdown upon GND disconnection.

Protection functions operate autonomously: undervoltage shutdown triggers at 3–5.5 V with 0.5 V hysteresis; overvoltage shutdown activates above 36 V; short-circuit current limiting engages at 6–15 A depending on VCC; and thermal shutdown resets at 135°C after 15°C hysteresis. All diagnostics feed into the STATUS pin with 20 ms delay under overload.

Key Specifications

Pinout & Package

The VN750PT is housed in a thermally enhanced PPAK (Power Plastic Package) with exposed drain pad for low thermal resistance (R_thj-case = 2.1 °C/W). The package supports surface-mount reflow assembly and requires specific PCB copper area (≥6 cm²) for rated 6 A operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN750PT, STVN7012AJR delivers higher current capacity but sacrifices integrated off-state diagnostics, while BTS724G adds SPI-based telemetry at the expense of thermal efficiency and bill-of-materials simplicity - making VN750PT optimal for cost-sensitive, thermally constrained automotive body electronics.

Availability

VN750PT is available at Aetrix Electronics and suitable for automotive lighting control, engine management solenoid driving, and body control module power distribution requiring stable component supply across long production lifecycles.

Supply support for VN750PT 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 qualification expertise.

VN750PT belongs to the VIPower® M0-3 high-side driver family, engineered specifically for automotive body electronics demanding robustness against load dumps, reverse battery, and thermal stress in space-constrained modules.

FAQ

What is the maximum inductive load energy the VN750PT can safely switch?

The VN750PT supports up to 138 mJ maximum switching energy for PPAK variants (L = 2.46 mH, V_bat = 13.5 V, I_L = 9 A, T_jstart = 150°C), verified per ST's application note AN4027. This corresponds to typical automotive solenoid and lamp ballast loads without external snubbers, provided PCB copper area meets ≥6 cm² requirement.

Does the VN750PT require an external pull-up resistor on the STATUS pin?

Yes - the STATUS pin is an open-collector NPN output. A 4.7 kΩ to 10 kΩ pull-up resistor to V_CC is mandatory for proper logic-level signaling to a microcontroller. Without it, the pin cannot assert a high state during normal operation or report diagnostic status reliably.

Can the VN750PT drive loads directly from a 24 V truck battery system?

Yes - its 36 V absolute maximum V_CC rating and built-in load-dump protection (per ISO 7637-2 Pulse 5a) allow direct connection to 24 V commercial vehicle batteries. The active V_CC clamp limits transients to safe levels, and thermal shutdown ensures reliability during prolonged 24 V operation at elevated ambient temperatures.

How does the VN750PT detect loss of ground, and what happens when it occurs?

The VN750PT monitors GND pin potential relative to internal references; if GND disconnects, the device detects loss of return path and immediately disables the output stage within microseconds. This prevents uncontrolled current flow through parasitic paths and complies with ISO 26262 functional safety requirements for fail-safe behavior in critical loads.