STMicroelectronics VN5R003H-E

Overview

VN5R003H-E from STMicroelectronics is a reverse battery protection switch built on VIPower® M0-3 technology, functioning as a high-side smart power MOSFET with integrated gate driver and protection circuitry. It features 3 mΩ on-state resistance, -16 V to 28 V operating supply range, and automatic shutdown during negative input voltage events. It is deployed in automotive electronic control units (ECUs) to prevent damage from accidental battery polarity reversal.

For engineers reviewing the VN5R003H-E datasheet, VN5R003H-E pinout, VN5R003H-E application, or VN5R003H-E equivalent, key selection criteria include reverse-battery fault response time, thermal performance under pulsed load (60 A peak), ESD robustness (5 kV HBM), and compliance with ISO 7637-2 transient immunity (Pulse 1, 2a, 3a, 3b, 4, 5b).

Technical Context

The device implements a monolithic high-side switch with integrated current-sense, thermal shutdown, and overvoltage clamping. Its control logic turns ON when IN voltage is negative relative to Drain, and automatically disables when Drain voltage falls below IN by >17 V - enabling passive reverse-polarity detection without external biasing.

Thermal management relies on the HPAK package's low R_thj-case of 0.5 °C/W and optimized PCB copper layout (6 cm² recommended). Electrical transient resilience is achieved via internal clamp structures: V_CLPDS = 17–23 V (Drain–Source), V_CLPDIN = 41–52 V (Drain–IN), and validated ISO 7637-2 Class C performance across all pulses.

Key Specifications

Pinout & Package

Package: HPAK (Heat Sink Power Package), thermally enhanced surface-mount package with exposed drain tab for direct PCB thermal coupling. Dimensions: 6.4 mm × 7.0 mm × 9.7 mm (L × W × H), 7-pin configuration with 4 Source terminals, 1 Drain (tab), 1 IN, and 1 NC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar reverse battery protection applications.

Compared with STVN7R003H-TR, VN5R003H-E trades current sensing for lower cost and zero quiescent overhead; versus NIS5132MN, it delivers superior thermal performance, integrated transient protection, and automotive-grade reliability in a thermally optimized package.

Availability

VN5R003H-E is available at Aetrix Electronics and suitable for automotive electronic control units, body electronics modules, and transmission control systems requiring stable component supply across extended temperature ranges and high-reliability production cycles.

Supply support for VN5R003H-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 capability and AEC-Q100 qualified product lines.

VN5R003H-E belongs to ST's VIPower® high-side switch family, engineered specifically for automotive reverse-battery protection with emphasis on thermal robustness, transient immunity, and integration density in under-hood environments.

FAQ

What is the maximum continuous current rating for VN5R003H-E at 105°C ambient?

At T_A = 105°C with 6 cm² PCB copper area, the device supports 30 A continuous current. This is derived from its R_thj-amb = 42 °C/W, maximum T_j = 150°C, and power dissipation P_D = I² × R_ON = 30² × 0.003 = 2.7 W, yielding ΔT = 2.7 × 42 = 113.4°C rise above ambient.

Does VN5R003H-E require an external pull-down resistor on the IN pin?

No. The IN pin has internal pull-down functionality. When left unconnected, the device remains in OFF state and behaves as a power diode between Source and Drain. External biasing is unnecessary unless active control logic mandates precise timing or noise immunity beyond internal design.

Can VN5R003H-E be used in 24 V commercial vehicle applications?

Yes. Its operating voltage range extends to 28 V, covering nominal 24 V systems including cranking transients up to -16 V and load-dump spikes. It has been validated per ISO 7637-2 Pulse 5b (up to +87 V) when used with external clamp, meeting commercial truck ECU requirements.

How does the device behave during a reverse-battery event?

When battery polarity is reversed (Drain = -12 V, Source = 0 V), V_DRAIN − V_IN drops below -17 V, triggering immediate shutdown. The device blocks reverse current flow, limiting I_{OUT_rev} to -1.5 to -0.5 mA, protecting downstream circuitry without latch-up or damage.