STMicroelectronics VND5T100AJTR-E

Overview

VND5T100AJTR-E from STMicroelectronics is a dual-channel high-side driver IC for 24 V automotive systems, integrating analog current sense and latch-off protection. It delivers 22 A typical current limiting per channel, 100 mΩ on-state resistance at 25 °C, and operates across 8–36 V supply range. Used in body control modules to drive resistive/inductive loads (e.g., solenoids, lamps, valves) with diagnostic feedback via proportional current sense pins.

For engineers reviewing the VND5T100AJTR-E datasheet, VND5T100AJTR-E pinout, VND5T100AJTR-E application, or VND5T100AJTR-E equivalent, key selection criteria include AEC-Q100 qualification, fault reset standby (FR_Stby) timing (2–24 µs), thermal shutdown latch behavior, and ±15% current sense ratio drift over –40 to 150 °C.

Technical Context

This monolithic VIPower device implements two independent high-side switches with integrated power clamping, undervoltage shutdown (5 V threshold), and active current limitation. Each channel features CMOS-compatible inputs with 0.25 V hysteresis and supports load dump transients up to +174 V (ISO 7637-2 Pulse 5b) when externally clamped to 58 V.

The analog current sense architecture provides four calibrated gain ranges (K1–K4) for IOUT/ISENSE ratios from 930 to 1600, enabling precise diagnostics across 0.35 A to 6 A load currents. Fault reporting includes open-load detection (off-state threshold: 2–4 V), short-to-VCC response (<1.8 ms), and thermal cycling with 7 °C hysteresis between 135 °C reset and 150 °C shutdown.

Key Specifications

Pinout & Package

Package: PowerSSO-12 (exposed tab connected to VCC, 12-pin surface-mount, thermally enhanced).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VND5T100AJTR-E, VND5E025AKTR-E trades higher current capability for lower conduction loss, while TPS4H160-Q1 sacrifices analog sensing resolution for reduced channel count and simplified interface - making the VND5T100AJTR-E optimal for dual-channel, diagnostic-rich 24 V automotive loads.

Availability

VND5T100AJTR-E is available at Aetrix Electronics and suitable for automotive body electronics, industrial valve control, commercial lighting systems, and HVAC blower management requiring stable component supply across extended temperature and transient environments.

Supply support for VND5T100AJTR-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.

The VND5T series belongs to ST's VIPower high-side driver product line, engineered specifically for AEC-Q100-compliant 12/24 V vehicle subsystems requiring integrated protection, diagnostics, and thermal resilience.

FAQ

What is the minimum pulse width required on FR_Stby to reset a latched fault condition?

The datasheet specifies t_reset as 2–24 µs - a low-level pulse of ≥2 µs duration on FR_Stby is sufficient to clear overload or thermal shutdown latch-off. This timing is validated across temperature and supply voltage, and applies independently to each channel. The pulse must fully transition from high to low and back to high within the window; sustained low asserts standby mode instead.

How does the current sense output behave during an output short-to-ground fault?

During short-to-ground, the device enters current-limited mode and reports fault via elevated I_SENSE. At 22 A limit, K4 gain yields ~13.5 mA into a 3.9 kΩ resistor, producing ~5.27 V at V_SENSE - exceeding the 5 V rail and triggering V_SENSEH (7.5–9.5 V) saturation. This high-voltage state is detectable by MCU ADC or comparator as a definitive fault flag.

Can unused CS pins be left floating, or do they require termination?

Unused CS pins must not be left floating. Table 2 mandates connection through a 10 kΩ resistor to ground to prevent leakage-induced offset errors and ensure stable open-load detection. Floating CS pins cause unpredictable sense current paths, degrading accuracy and potentially masking off-state faults. The 10 kΩ value balances noise immunity and minimal loading on the analog sense node.

Does the device support simultaneous switching of both channels, and what is the impact on thermal performance?

Yes - IN1 and IN2 can be driven concurrently without timing restrictions. However, simultaneous conduction doubles power dissipation: at 1.5 A each, R_ON rises to ~200 mΩ/channel at 150 °C, increasing total loss to ~450 mW. Thermal resistance junction-to-case is 6 °C/W per channel, so dual-channel operation requires ≥8 cm² PCB copper area to maintain T_J ≤150 °C in free air per Figure 27.