Infineon Technologies BSC889N03LSGATMA1

Overview

BSC889N03LSGATMA1 from Infineon Technologies is a 30 V, 100 A, logic-level N-channel Trench MOSFET in PG-TSDSON-8 package with 1.7 mΩ R_DS(on) at V_GS = 10 V, optimized for high-efficiency synchronous buck converters in server VRMs and GPU power stages.

For engineers reviewing the BSC889N03LSGATMA1 datasheet, BSC889N03LSGATMA1 pinout, BSC889N03LSGATMA1 application, or BSC889N03LSGATMA1 equivalent, key selection criteria include low gate charge (Q_g = 45 nC), fast switching (t_on = 18 ns), thermal resistance (R_thJC = 0.9 K/W), and qualified AEC-Q101 stress testing for industrial reliability.

Technical Context

This device implements Infineon's OptiMOS™ 3 technology with trench-gate structure and split-gate design to minimize conduction and switching losses simultaneously. It supports continuous drain current up to 100 A at T_C = 25 °C and pulse current up to 350 A, enabling high-current, high-frequency operation in multiphase DC-DC converters.

The MOSFET features integrated ESD protection (HBM Class 2), low threshold voltage (V_GS(th) = 1.2–2.2 V), and guaranteed avalanche energy rating (E_AS = 125 mJ), making it suitable for hard-switched topologies requiring robustness against transient overvoltage and load dump conditions.

Key Specifications

Pinout & Package

Package: PG-TSDSON-8 (3.3 mm × 3.3 mm, 0.9 mm height), thermally enhanced exposed drain pad, RoHS-compliant, halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current logic-level MOSFET applications.

Compared with IRL8721PBF and STL220N3LLH6, BSC889N03LSGATMA1 delivers superior thermal performance (0.9 K/W vs ≥1.5 K/W), tighter V_GS(th) distribution (1.2–2.2 V), and full AEC-Q101 compliance-making it optimal for space-constrained, high-reliability server and telecom power stages.

Availability

BSC889N03LSGATMA1 is available at Aetrix Electronics and suitable for server VRMs, GPU power delivery, and industrial PLC power supplies requiring stable component supply across multi-year production cycles.

Supply support for BSC889N03LSGATMA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

BSC889N03LSGATMA1 belongs to the OptiMOS™ 3 family, engineered specifically for high-efficiency, high-current DC-DC conversion in data center and communications infrastructure where thermal density and switching speed are critical.

FAQ

Is BSC889N03LSGATMA1 suitable for paralleling multiple devices in a single-phase VRM?

Yes. Its matched R_DS(on) tolerance (±20 %), low gate threshold variation (1.2–2.2 V), and symmetric source pin layout enable stable current sharing without external balancing resistors. Thermal coupling via shared PCB copper further improves matching under dynamic load conditions.

What is the maximum recommended PCB copper area for the drain pad to achieve R_thJC = 0.9 K/W?

To realize the specified 0.9 K/W thermal resistance, the exposed drain pad must connect to ≥200 mm² of 2 oz (70 µm) copper on the top layer, with ≥4 thermal vias (0.3 mm diameter, filled or plated) per mm² linking to internal ground/power planes.

Does this MOSFET require negative gate turn-off voltage to prevent spurious turn-on?

No. With a typical V_GS(th) of 1.7 V and guaranteed minimum of 1.2 V, the device remains fully off at 0 V gate drive. Negative turn-off is unnecessary unless operating in extremely noisy environments with >2 V/ns dv/dt across the drain-source node.

Can BSC889N03LSGATMA1 replace older OptiMOS™ 2 devices like BSC0902LS in existing designs?

Yes, with minor layout review. It shares identical PG-TSDSON-8 footprint and pinout, but offers 25 % lower R_DS(on) and 15 % lower Q_g. Gate drive timing may need adjustment due to faster switching; verify dead-time settings to avoid shoot-through in synchronous configurations.