Infineon Technologies IR25750LTRPBF

Overview

IR25750LTRPBF from Infineon Technologies (formerly International Rectifier) is a high-voltage current sensing IC that senses V_DS(on) of MOSFETs or V_CE(on) of IGBTs during switch conduction, features 600V blocking capability, 200ns GATE-to-CS blanking delay, 20.8V internal Zener clamps on GATE and CS pins, and operates without external V_CC. It enables inductance-less, resistor-less current sensing in high-side switching topologies for motor control and brick converters.

For engineers reviewing the IR25750LTRPBF datasheet, IR25750LTRPBF pinout, IR25750LTRPBF application, or IR25750LTRPBF equivalent, key selection criteria include its 600V high-side sensing node rating, gate-synced blanking timing, absence of external supply requirement, and SOT-23-5L package compatibility with space-constrained power stage layouts.

Technical Context

The device uses proprietary HVIC technology to isolate the high-voltage VS node (up to 600V) from the low-voltage CS output during switch off-time while extracting on-state voltage drop across the power device. Its GATE pin serves dual function: providing V_CC via the driven switch and synchronizing internal blanking to the switch's on/off transitions.

Internal 20.8V Zener clamps protect both GATE and CS pins against overvoltage transients; the 6.2kΩ typical VS-to-CS 'ON' resistance defines signal gain path integrity, and the 200ns typ. blanking delay ensures immunity to switching noise during turn-on edge. No external current-sense resistor is required, eliminating associated I²R losses.

Key Specifications

Pinout & Package

5-lead SOT-23 package with exposed pad (no thermal pad designation in datasheet); compact 2.9mm × 1.6mm footprint, 1.1mm height, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side V_DS(on)/V_CE(on) current sensing applications.

Compared with IR25750LPBF and UCC27531DR, the IR25750LTRPBF uniquely combines 600V high-side sensing, gate-synced blanking, and zero-V_CC operation in one SOT-23-5L package-making it irreplaceable for compact, efficient, resistor-less current monitoring in high-voltage switching nodes.

Availability

IR25750LTRPBF is available at Aetrix Electronics and suitable for motor control systems, industrial brick converters, and power tool inverters requiring stable component supply and long-term production continuity.

Supply support for IR25750LTRPBF 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

Infineon Technologies acquired International Rectifier in 2015 and continues development of its high-voltage analog IC portfolio, emphasizing reliability, integration, and industrial-grade qualification.

The IR25750L series belongs to Infineon's HVIC current sensing product line, designed specifically to replace discrete shunt-based sensing in high-efficiency, high-density power conversion systems where thermal and space constraints prohibit external resistors.

FAQ

What is the maximum continuous voltage the VS pin can withstand?

The VS pin is rated for continuous operation up to 600V, with absolute maximum rating of 625V for short pulses (≤1µs). This rating is validated under recommended operating conditions and accounts for transient overvoltage in hard-switched topologies such as flyback and half-bridge converters.

Does the IR25750LTRPBF require an external power supply?

No. The device derives all operating power from the GATE pin, which connects to the gate driver output of the controlled MOSFET or IGBT. When the gate is driven high, the IC powers up and synchronizes its sensing window; no auxiliary V_CC rail or bias supply is needed.

Can Pin 2 (N/C) be connected to ground or left floating?

Pin 2 is internally unconnected and must remain floating. Connecting it to ground or any other node may cause unpredictable behavior or damage due to internal floating node coupling. PCB layout should omit solder mask and avoid routing traces near this pin.

How does the 200ns blanking delay improve current measurement accuracy?

The 200ns blanking delay suppresses the CS output immediately after GATE rises, preventing false triggering from Miller-induced voltage spikes and gate-drive overshoot during the switch's turn-on transition. This ensures only steady-state V_DS(on) or V_CE(on) is measured, improving linearity and fault detection fidelity.