STMicroelectronics VND5T100AJ-E

Overview

VND5T100AJ-E from STMicroelectronics is a dual-channel high-side driver IC designed for 24 V automotive power distribution, integrating analog current sense and latch-off protection. It features 100 mΩ typical on-state resistance per channel, 22 A typical current limitation, 8–36 V operating supply range, and AEC-Q100 qualification for under-hood use in engine control, body electronics, and lighting systems.

For engineers reviewing the VND5T100AJ-E datasheet, VND5T100AJ-E pinout, VND5T100AJ-E application, or VND5T100AJ-E equivalent, key selection criteria include its dual-channel high-side topology, proportional current sense accuracy across –40 °C to 150 °C, fault reset via FR_Stby pin, thermal shutdown latching behavior, and PowerSSO-12 package thermal performance.

Technical Context

This monolithic VIPower device implements two independent high-side switches with integrated active clamp, undervoltage/overvoltage protection, and real-time diagnostics. Each channel delivers precise analog current sense (K1 = 930–2185 A/A) referenced to ground, enabling wide-range load monitoring without external shunts.

It uses CMOS-compatible inputs with 0.25 V hysteresis and supports latch-off recovery via low-pulse on FR_Stby. Fault reporting includes overload, short-to-VCC, open-load (off-state), and thermal shutdown - all signaled through the CS pins with defined delay times (tDSENSE2H: 100–200 µs).

Key Specifications

Pinout & Package

Delivered in PowerSSO-12 package - thermally enhanced exposed-tab SO-12 variant with VCC connected to the thermal pad for optimal junction-to-board heat transfer. Tab must be soldered to PCB copper pour for RthJC = 6 °C/W performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS4H160-Q1 and VND7140AJTR-E, the VND5T100AJ-E uniquely combines dual-channel operation, 22 A current limit, and multi-range analog current sense in a single AEC-Q100-qualified PowerSSO-12 package - making it optimal for space-constrained, high-diagnostic-fidelity 24 V automotive nodes requiring minimal external components.

Availability

VND5T100AJ-E is available at Aetrix Electronics and suitable for engine control, body electronics, ADAS actuation, and commercial vehicle lighting requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for VND5T100AJ-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 solutions with vertical manufacturing and AEC-Q100 validation infrastructure.

The VND5T100AJ-E belongs to ST's VIPower M0-7 family of intelligent power switches, engineered specifically for high-reliability 12 V/24 V automotive power distribution with integrated diagnostics and protection - targeting ASIL-B–capable systems.

FAQ

What is the purpose of the FR_Stby pin?

The FR_Stby pin serves dual functions: a low pulse resets latch-off conditions (overload or thermal shutdown), while a sustained low level disables all outputs and places the device in ultra-low-power standby mode (<2 µA). Its hysteresis (0.25 V) prevents false triggering from noise, and clamp voltage (11–15 V) protects against overvoltage during reset pulses.

How does the current sense function work across varying load currents?

The VND5T100AJ-E provides four calibrated current sense gain ranges (K1–K4), each optimized for specific IOUT segments: K1 (350 mA), K2 (0.8 A), K3 (1.5 A), and K4 (6 A). This multi-range architecture maintains ±15% sense ratio accuracy over –40 °C to 150 °C, enabling precise analog monitoring without external amplification or calibration.

Can this device drive inductive loads like solenoids or relays?

Yes - the device is explicitly characterized for inductive loads, with maximum demagnetization energy rated at 70 mJ (L = 1.9 mH, VBAT = 32 V, TJstart = 150 °C). Its integrated active clamp and controlled (dVOUT/dt)on/off slopes (1.0 / 0.65 V/µs) suppress voltage spikes and reduce EMI during turn-off, eliminating need for external flyback diodes in most cases.

What PCB layout considerations are critical for thermal performance?

Thermal vias under the PowerSSO-12 thermal pad (0.3 mm diameter, 1.2 mm spacing) connected to ≥8 cm² internal/external copper pours are mandatory to achieve RthJA ≤ 45 °C/W. The datasheet specifies 77 mm × 86 mm double-layer FR4 board with 70 µm Cu; reducing copper area increases junction temperature by up to 25 °C/W per cm² below 4 cm².