STMicroelectronics

VN750-B5

VN750-B5 Description

The VN750-B5 from STMicroelectronics is a high-side power switch designed for general-purpose load driving applications. As part of the VIPower™ series, it integrates a single N-channel MOSFET with a 1:1 input-to-output ratio, supporting a load voltage range of 5.5V to 36V and delivering a maximum output current of 6A. Housed in a P2PAK (4 Leads + Tab) surface-mount package, this device is optimized for space-constrained designs while ensuring efficient thermal dissipation.

Though marked as obsolete, the VN750-B5 remains relevant for legacy systems due to its robust fault protection suite, including current limiting, open-load detection, over-temperature shutdown, and over-voltage protection. Its 60mOhm (max) Rds(on) ensures minimal conduction losses, enhancing energy efficiency in power distribution applications.

VN750-B5 Features

• High-Side Configuration: Simplifies circuit design by eliminating the need for external pull-up resistors.
• Integrated Protections: Combines fixed current limiting, open-load detection, and thermal shutdown for system reliability.
• Auto-Restart & Status Flag: Automatically recovers from faults and provides diagnostic feedback.
• Low On-Resistance: 60mOhm (max) reduces power dissipation, improving thermal performance.
• Wide Voltage Range: Supports 5.5V–36V loads, making it versatile for 12V/24V automotive or industrial systems.
• Compact P2PAK Package: Combines high-current handling with a surface-mount footprint.

VN750-B5 Applications

• Automotive Systems: Ideal for powertrain controls, lighting modules, and solenoid drivers due to its rugged design and fault tolerance.
• Industrial Load Switching: Used in PLC outputs, motor drivers, and relay replacements where high-side switching is preferred.
• Power Distribution Units (PDUs): Efficiently manages DC load switching in telecom or server racks.
• Legacy Equipment Maintenance: Suitable for servicing older designs requiring high-current, high-voltage switching with integrated diagnostics.

Conclusion of VN750-B5

The VN750-B5 excels in high-side load driving with its low Rds(on), comprehensive protections, and compact packaging. While obsolete, its auto-restart functionality and status monitoring make it a dependable choice for automotive, industrial, and power distribution systems requiring robust performance. Engineers maintaining legacy designs or seeking cost-effective solutions for moderate-current switching will find this IC particularly valuable.

(Note: For new designs, consider STMicroelectronics' active alternatives within the VIPower™ series.)