STMicroelectronics VN920DSPTR-E

Overview

VN920DSPTR-E from STMicroelectronics is a high-side power switch IC fabricated in VIPower M0-3 technology, designed to drive grounded loads in automotive and industrial power distribution systems. It delivers 25 A DC output current with 16 mΩ on-state resistance at 10 A and 25°C, features CMOS-compatible input logic, integrated open-load detection (both ON/OFF states), short-to-VCC detection, thermal shutdown with automatic restart, and reverse battery protection. It operates across 5.5–36 V supply range and supports ISO 7637-2 transient immunity up to Level IV.

For engineers reviewing the VN920DSPTR-E datasheet, VN920DSPTR-E pinout, VN920DSPTR-E application, or VN920DSPTR-E equivalent, this device is selected for robust load switching where diagnostic feedback (via STATUS pin), fault resilience (undervoltage/overvoltage shutdown, loss-of-ground detection), and low quiescent current (<25 µA off-state) are critical in 12 V/24 V vehicle subsystems and industrial control modules.

Technical Context

The VN920DSPTR-E integrates a vertical power MOSFET with intelligent gate driver, current-limiting circuitry, and analog diagnostics. Its internal current limiter activates at 30–75 A depending on junction temperature, and thermal shutdown triggers at 150–200°C with 135°C reset hysteresis. The STATUS pin provides open-drain fault signaling with programmable pull-up, reporting overtemperature, undervoltage, overvoltage, open-load (ON/OFF), and short-to-VCC conditions via voltage thresholds and timing delays.

Input logic includes 0.5 V hysteresis, 1.25 V low-level and 3.25 V high-level thresholds, and ±1 mA clamp protection. Output voltage slew rates are controlled during turn-on/off (dVOUT/dt(on) ≈ 500 V/ms, dVOUT/dt(off) ≈ 450 V/ms at VCC=13 V, RL=1.3 Ω), minimizing EMI while enabling safe demagnetization of inductive loads up to 6 mH.

Key Specifications

Pinout & Package

Delivered in PowerSO-10™ package: thermally enhanced 10-pin surface-mount package with exposed die pad for low R_thj-case (1.3°C/W), rated for -40°C to +150°C case operating temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN250 and TPS27081A, the VN920DSPTR-E uniquely combines 25 A capability, full ISO 7637-2 immunity, dual-state open-load detection, and reverse battery compatibility - making it the only option qualified for safety-critical automotive power distribution where diagnostic completeness and transient resilience are mandatory.

Availability

VN920DSPTR-E is available at Aetrix Electronics and suitable for body control modules, engine management systems, industrial PLC output stages, and commercial vehicle power distribution requiring stable component supply across extended temperature and transient stress conditions.

Supply support for VN920DSPTR-E 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, designing and manufacturing silicon solutions for automotive, industrial, and power management applications.

The VN920DSPTR-E belongs to ST's VIPower family of intelligent power switches, engineered specifically for automotive-grade high-side load control with integrated diagnostics and protection - targeting replacement of electromechanical relays in 12 V/24 V vehicle electrical architectures.

FAQ

What is the maximum continuous output current rating for VN920DSPTR-E?

The VN920DSPTR-E is rated for 25 A DC output current under specified thermal conditions (T_C ≤ 25°C, R_thj-case = 1.3°C/W). At higher case temperatures, current must be derated using the I_LIM vs. T_case curve (Figure 18), dropping to ~45 A at 100°C and ~30 A at 125°C. Peak current capability reaches 75 A under short-duration overload before thermal shutdown activates.

How does the STATUS pin indicate an open-load condition in the OFF state?

In OFF state, the STATUS pin goes low when the output voltage exceeds 1.5–3.5 V (V_OL threshold), indicating an open load. This occurs because the internal detection circuit senses high impedance at the OUTPUT pin relative to VCC. The delay from turn-off to STATUS assertion is 1000 µs (t_DOL(off)), ensuring stable measurement after voltage settling. An external pull-up resistor (typically 10 kΩ to 5 V) is required to generate a valid logic-high idle state.

Can VN920DSPTR-E drive inductive loads without external flyback components?

Yes - the VN920DSPTR-E includes an internal demagnetization clamp that limits turn-off output voltage to V_CC−41 V (min) during inductive kickback. This allows safe operation with inductive loads up to 6 mH without external diodes, provided layout minimizes parasitic inductance and thermal limits are observed. For sustained high-energy demagnetization (e.g., >100 mJ), external snubbers may still be recommended per Figure 24 derating curves.

What grounding configuration is required to enable loss-of-ground protection?

Loss-of-ground protection requires the GROUND pin (Pin 6) to be connected directly to the main system ground plane - not through shared resistors or isolation networks. If a ground protection network (e.g., reverse-battery diode or resistor) is used, it must be placed upstream of the VN920DSPTR-E's GROUND pin so the IC monitors its own ground reference. Failure to maintain direct GND connectivity disables the loss-of-ground detection feature and risks uncontrolled output behavior.