STMicroelectronics VND5T050AK-E

Overview

VND5T050AK-E from STMicroelectronics is a dual-channel high-side power switch IC for 24 V automotive systems, integrating analog current sense and latch-off protection. It features 50 mΩ typical on-state resistance per channel, 34 A typical current limitation, AEC-Q100 qualification, and operates across 8–36 V supply range. It drives resistive, inductive, or capacitive loads with ground-referenced topology in body control modules and lighting systems.

For engineers reviewing the VND5T050AK-E datasheet, VND5T050AK-E pinout, VND5T050AK-E application, or VND5T050AK-E equivalent, key selection criteria include its dual-channel high-side architecture, proportional current sense accuracy across 10 mA–8 A, thermal shutdown latch behavior, fault reset standby (FR_Stby) timing (2–24 µs), and ISO 7637-2 pulse Class C immunity with external protection resistors.

Technical Context

This monolithic VIPower device implements active power limitation during overload, self-limiting fast thermal transients, and off-state open-load detection via voltage threshold sensing. Its analog current sense delivers programmable gain (K₀ = 1409–3726 A/A at 100 mA) with ±20% drift over temperature and load range.

The device integrates undervoltage shutdown (5 V typ.), overvoltage clamp (58–70 V), output short-to-VCC detection (180–1800 µs delay), and thermal shutdown at 150–200 °C with 7 °C hysteresis. Reset requires a low pulse on FR_Stby, while full standby is entered when all inputs and FR_Stby are held low.

Key Specifications

Pinout & Package

Package: PowerSSO-24 (exposed thermal pad connected to VCC). Pin count: 24 terminals, top-view layout includes dual outputs (OUT1/OUT2), dual inputs (IN1/IN2), dual current sense (CS1/CS2), shared VCC, GND, and FR_Stby.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2HB35-Q1 and VND7050AJTR-E, the VND5T050AK-E uniquely combines dual-channel integration, analog current sense with multi-point K-ratio calibration, and explicit FR_Stby-controlled latch-off-making it optimal for AEC-Q100-compliant systems requiring deterministic fault handling and closed-loop load verification.

Availability

VND5T050AK-E is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting systems, engine bay solenoid drivers, and electric power steering auxiliary load management requiring stable component supply across extended temperature and transient environments.

Supply support for VND5T050AK-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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 validation infrastructure.

The VND5T050AK-E belongs to ST's VIPower M0-7 high-side driver product line, engineered specifically for intelligent 12/24 V automotive load control with integrated diagnostics, protection, and EMC resilience.

FAQ

What is the function of the FR_Stby pin, and how must it be driven?

The FR_Stby pin serves dual roles: a low pulse (≥2 µs, ≤24 µs) resets latch-off faults (overload/thermal), while sustained low level forces full standby mode with all outputs disabled and supply current reduced to 2 µA. It must be driven by an open-drain or push-pull MCU GPIO with 0.9 V low / 2.1 V high thresholds and 0.25 V hysteresis-no external pull-up is required.

How does the current sense output behave during fault conditions?

During overload, overtemperature, or off-state openload, the CS pin transitions to a high-voltage fault state (V_SENSEH = 7.5–9.5 V at VCC = 24 V, R_SENSE = 3.9 kΩ), delivering 4.9–12 mA. This distinct voltage/current signature enables MCU-based fault classification without additional comparators-unlike normal operation where I_SENSE = I_LOAD/K.

Can VND5T050AK-E drive inductive loads without external flyback diodes?

No. Although the device includes internal V_DEMAG clamp (VCC − 58 to VCC − 70 V) and handles up to 210 mJ demagnetization energy, external freewheeling diodes remain mandatory for inductive loads to prevent voltage overshoot beyond clamp limits and ensure reliable turn-off. Layout must minimize stray inductance (<40 µH in short-circuit condition per datasheet).

What PCB layout practices are critical for thermal performance?

Thermal performance depends on soldering the exposed PowerSSO-24 thermal pad (connected to VCC) to ≥8 cm² of inner/outer copper with ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch). R_thJA drops from ~45 °C/W (footprint only) to ~25 °C/W with 8 cm² copper-essential to sustain 34 A current limit at 150 °C junction temperature in continuous operation.