STMicroelectronics VND5T035AK-E

Overview

VND5T035AK-E from STMicroelectronics is a dual-channel high-side driver IC with integrated analog current sense, designed for 24 V automotive loads. It features 35 mΩ typical on-state resistance per channel, 42 A typical current limitation, AEC-Q100 qualification, and fault reset via FR_Stby pin. Used in body control modules to drive solenoids, lamps, and valves.

For engineers reviewing the VND5T035AK-E datasheet, VND5T035AK-E pinout, VND5T035AK-E application, or VND5T035AK-E equivalent, key selection criteria include channel-wise current sense ratio (K1 = 2960 typ.), thermal shutdown latch-off behavior, ISO 7637-2 pulse immunity, and PowerSSO-24 package thermal resistance (RthJC = 2 °C/W).

Technical Context

This monolithic VIPower device integrates two independent high-side switches with active power limitation, undervoltage/overvoltage clamping, and proportional current sense outputs (CS1/CS2). Each channel delivers precise analog current feedback (±15% K1 drift over -40–150 °C) and supports diagnostic functions including off-state openload detection and short-to-VCC reporting.

The device implements thermal cycling during overload (reset at TRS = 135 °C), latches off under sustained overtemperature (>150 °C) or short-circuit, and resets only upon low pulse on FR_Stby. Input pins (IN1/IN2) are CMOS-compatible with 0.25 V hysteresis and 3.0 V logic threshold.

Key Specifications

Pinout & Package

Package: PowerSSO-24 (exposed thermal pad tied to VCC), surface-mount, thermally enhanced for automotive under-hood use.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS4H160-Q1 and VND7050AJTR-E, VND5T035AK-E uniquely combines dual-channel operation, 42 A current limiting, and multi-range analog current sense in one AEC-Q100 Grade 0 package-making it optimal for ASIL-B body domain controllers where channel density and diagnostic fidelity are critical.

Availability

VND5T035AK-E is available at Aetrix Electronics and suitable for automotive body control modules, engine management systems, advanced lighting control, and electric power steering applications requiring stable component supply across extended temperature and transient stress conditions.

Supply support for VND5T035AK-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 specializing in automotive, industrial, and power management solutions, with over 40 years of automotive-grade IC development experience.

The VND5T035AK-E belongs to ST's VIPower M0-7 high-side driver family, engineered specifically for robust, diagnostic-rich 12/24 V automotive load control-emphasizing functional safety, EMC resilience, and thermal survivability in harsh environments.

FAQ

What is the maximum continuous output current per channel?

The VND5T035AK-E does not specify a continuous current rating due to thermal dependence on PCB layout. Its DC current limitation is 42 A typ. under short-circuit conditions, but steady-state current must be limited by thermal design. With RthJC = 2 °C/W and 150 °C max junction temperature, continuous current is ~25 A at 25 °C ambient with adequate copper area-consult Figure 27 for RthJA vs. PCB copper area.

How does the FR_Stby pin function during normal operation versus fault recovery?

During normal operation, FR_Stby must be held high (≥2.1 V) to enable outputs. When overload or thermal shutdown occurs, the channel latches off and CS pin rises to VSENSEH (7.5–9.5 V); a low pulse (≤0.9 V, ≥2 µs) on FR_Stby resets the latch. If all INx and FR_Stby are held low, the device enters <2 µA standby mode-retaining state but disabling outputs.

Can the current sense outputs (CS1/CS2) be connected directly to a 3.3 V MCU ADC?

Yes-CS pins deliver current (not voltage) proportional to load current. With a 3.9 kΩ sense resistor, VSENSE reaches 5 V at 12 A, staying within 3.3 V MCU ADC range if scaled. For direct 3.3 V ADC use, reduce RSENSE to ≤2.2 kΩ to keep VSENSE ≤3.3 V at max expected load; leakage is <1 µA, minimizing measurement error.

What layout guidelines ensure reliable operation under ISO 7637-2 Pulse 1 transients?

To pass ±450/±600 V Pulse 1, place ≥10 kΩ resistors on IN1/IN2/FR_Stby pins per datasheet Table 13, use ≥10 nF VCC–GND ceramic capacitor near the device, and route GND with minimum inductance. The PowerSSO-24 thermal pad must connect to a large VCC copper pour; avoid splitting GND planes beneath the IC to maintain low-impedance return paths for transient currents.