STMicroelectronics VN9D5D20FNTR

Overview

VN9D5D20FNTR from STMicroelectronics is a 4-channel automotive high-side driver IC built on VIPower M0-7 technology, designed for direct ground-referenced resistive/inductive load control in engine bays and body electronics. It delivers 72 A peak current (Channel 0), 6.7 mΩ R_ON, 24-bit ST-SPI interface, integrated 10-bit ADC with 0.1% FSR accuracy, and AEC-Q100 Grade 0 qualification for under-hood applications down to –40 °C.

For engineers reviewing the VN9D5D20FNTR datasheet, VN9D5D20FNTR pinout, VN9D5D20FNTR application, or VN9D5D20FNTR equivalent, this device supports deep cold-cranking compliance (LV124 Rev. 2013), programmable limp-home mode via OTP-assigned DI0/DI1, real-time digital current sense per channel, and fail-safe operation during VDD loss or watchdog timeout - critical for ECU power distribution and lighting control systems.

Technical Context

This device integrates four independent VIPower high-side switches with dedicated thermal and overcurrent protection logic per channel. Each output features self-limiting fast thermal transients, programmable power limitation, and latch-off or time-limited auto-restart behavior upon overtemperature or overload events.

Control is implemented via dual-path interface: full-featured 24-bit SPI (CSN/SCK/SDI/SDO) for register read/write, diagnostics, and PWM configuration, plus two direct inputs (DI0/DI1) that retain functional assignment in limp-home, standby, and reset modes - enabling deterministic fail-operational behavior without MCU intervention.

Key Specifications

Pinout & Package

Package: QFN 6 × 6 mm, 32-pin, exposed thermal pad (TAB electrically connected to V_CC drain nodes). Pin count includes 4 power outputs (each with dual-source pins), 2 direct inputs, 4 SPI signals, PWM clock, V_DD, V_CC, GND, and NCs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STVN9D5D20FTR and BTS724G, VN9D5D20FNTR provides superior thermal performance via QFN-32 package, eliminates external current-sense components with its 10-bit ADC, and enables advanced lighting control through its integrated PWM engine - making it optimal for next-generation automotive ECU platforms requiring compact, intelligent power switching.

Availability

VN9D5D20FNTR is available at Aetrix Electronics and suitable for front-end lighting control, engine bay power distribution, body control modules, and commercial vehicle power management requiring stable component supply across automotive production lifecycles.

Supply support for VN9D5D20FNTR 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.

VN9D5D20FNTR belongs to ST's VIPower M0-7 family of intelligent power switches, engineered specifically for automotive body electronics and power distribution units requiring high integration, fail-safe operation, and deep cold-cranking capability.

FAQ

What is the maximum continuous current per channel at 150 °C ambient?

At T_A = 150 °C and with PCB copper area ≥ 400 mm² per channel, Channel 0 delivers 38 A continuous (derated from 72 A peak), while Channels 1–3 sustain 22 A each due to higher R_ON. Derating curves are provided in Figure 12 of DS13579 Rev 11, and thermal design must include TAB soldering to internal ground plane.

How does the limp-home mode activate and what outputs are active by default?

Limp-home activates automatically during startup, VDD undervoltage (<1.8 V), or watchdog timeout. Outputs are controlled solely by DI0/DI1: by default, DI0 high enables OUTPUT0 and OUTPUT1, DI1 high enables OUTPUT2 and OUTPUT3. OTP programming can remap this assignment, and all protections remain fully active.

Can the integrated ADC measure load current during PWM operation?

Yes - the 10-bit ADC supports asynchronous sampling synchronized to PWM edges, enabling accurate current measurement during active switching. The ADC conversion result is accessible via SPI register 0x24 (CH0–CH3 current values), with configurable blanking windows to reject switching noise.

Is external V_CC clamping required for load dump protection?

No - VN9D5D20FNTR integrates an on-die clamp rated for ISO 7637-2 Pulse 5a (40 V, 100 ms) on the V_CC pin. External clamping is unnecessary unless system-level testing reveals overshoot beyond 40 V, in which case a 36 V TVS may be added as margin.