Infineon BTS740S2 Smart High-Side Power Load Switch 43V 50A SOIC-20

The Infineon BTS740S2 Smart High-Side Power Load Switch is a dual-channel high-side power switch rated at 43 V, with a current limit of 50 A per channel, built on Smart SIPMOS technology. It integrates a vertical power FET with embedded protection and diagnostic functions, making it suitable for demanding power management applications.

At its core is an N-channel vertical power MOSFET with an integrated charge pump, which supports efficient switching. The device has ground-referenced, CMOS-compatible inputs for straightforward interfacing with control logic. Diagnostic feedback and a proportional load current sense circuit are monolithically integrated alongside the power stage.

Key Features and Protections

The switch includes undervoltage and overvoltage shutdown with auto-restart and hysteresis, which helps guard against power supply irregularities. It is designed for high-energy robustness and offers load dump protection for harsh electrical environments.

Fast demagnetisation capability for inductive loads is intended to limit voltage spikes. Logic ground independence from the load ground supports noise immunity and system stability.

Specifications

• Input voltage rating: 43 V
• Current limit: 50 A per channel
• On-state resistance: 0.027 ohm
• Channels: Dual-channel
• Technology: Smart SIPMOS with vertical power FET
• Package: SOIC-20
• Qualification: AEC-Q100
• Width: 3.3, Depth: 1.5, Height: 4.3
• Weight: 0.5 g

Applications

The BTS740S2 is intended for demanding power management applications and is described as suitable for automotive and industrial environments where reliability is critical.

The device is supplied in a compact SOIC-20 package with a 43 V input voltage rating and a 50 A current limit per channel.