Infineon Technologies BSC0503NSIATMA1

Overview

BSC0503NSIATMA1 from Infineon Technologies is an N-channel OptiMOSTM5 Power-MOSFET optimized for high-efficiency synchronous buck converters in server and telecom power supplies. It features 30 V V_DS, 3.0 mΩ R_DS(on) @ V_GS=4.5 V, 88 A continuous drain current at T_C=25 °C, monolithic integrated Schottky-like body diode, and 100% avalanche tested robustness.

For engineers reviewing the BSC0503NSIATMA1 datasheet, BSC0503NSIATMA1 pinout, BSC0503NSIATMA1 application, or BSC0503NSIATMA1 equivalent, key selection criteria include low R_DS(on) at 4.5 V drive, Q_g=7.1 nC for fast switching, Q_oss=10.6 nC for reduced turn-off loss, integrated diode recovery (Q_rr=12 nC), and SuperSO8 thermal performance with R_thJC=3.5 K/W.

Technical Context

This MOSFET employs a trench-gate, superjunction-derived silicon process to achieve ultra-low on-resistance while maintaining fast switching dynamics. Its gate charge profile-Q_gs=2.5 nC, Q_gd=1.8 nC, and plateau voltage of 2.6 V-enables precise control in high-frequency synchronous rectification.

The integrated body diode exhibits V_SD=0.54 V @ 4 A and Q_rr=12 nC under 400 A/µs di/dt, supporting efficient hard-switched and ZVS converter topologies. Thermal design leverages the bottom-side thermal pad of the SuperSO8 package for direct PCB copper conduction.

Key Specifications

Pinout & Package

Package: PG-TDSON-8 (SuperSO8), thermally enhanced surface-mount package with exposed drain pad on bottom side for optimal heat transfer to PCB copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel power MOSFET applications.

Compared with IRLHS6342TRPBF and SI7157DP-T1-GE3, BSC0503NSIATMA1 delivers superior thermal performance (R_thJC=3.5 K/W), guaranteed avalanche ruggedness, and balanced Q_g/R_DS(on) for high-frequency server VRMs-making it the preferred choice where reliability and power density are jointly critical.

Availability

BSC0503NSIATMA1 is available at Aetrix Electronics and suitable for server CPU voltage regulators, telecom intermediate bus converters, and industrial PLC power modules requiring stable component supply and long-term lifecycle assurance.

Supply support for BSC0503NSIATMA1 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, and industrial control ICs and discrete devices, with global manufacturing and qualification infrastructure.

This part belongs to the OptiMOSTM5 family-designed specifically for high-efficiency, high-frequency DC-DC conversion in data center, telecom, and industrial power systems where low R_DS(on) at logic-level gate drive and robust switching behavior are essential.

FAQ

What is the maximum junction temperature and how is it enforced?

The BSC0503NSIATMA1 has a rated T_j range of –55 °C to +150 °C per JEDEC J-STD-20. Thermal derating is defined in the datasheet's "Power dissipation vs. case temperature" curve (Diagram 1), where P_tot drops linearly from 36 W at 25 °C to 0 W at 160 °C. Designers must maintain T_j ≤150 °C using the measured R_thJC=3.5 K/W and board-level thermal resistance.

Does this MOSFET require a negative gate turn-off voltage?

No. The device has a gate threshold voltage V_GS(th) of 1.2–2.0 V and is fully enhanced at V_GS ≥4.5 V. Negative turn-off voltage is not required or recommended; standard 0 V to 4.5 V or 10 V gate drive suffices. The gate oxide is rated for ±20 V, but sustained negative bias offers no benefit and risks unintended turn-on in noisy environments.

How does the integrated Schottky-like diode differ from a standard body diode?

Unlike conventional MOSFET body diodes, this diode is process-optimized for lower forward voltage (V_SD=0.54 V @ 4 A) and significantly reduced reverse recovery charge (Q_rr=12 nC). It achieves softer recovery with lower peak di/dt, reducing EMI and enabling reliable synchronous rectification without external diode paralleling.

Can BSC0503NSIATMA1 be used in parallel configurations?

Yes-its positive temperature coefficient of R_DS(on) (confirmed in Diagram 6) ensures inherent current sharing across paralleled devices. However, layout symmetry (matched gate and source inductance) and individual gate resistors (≥1 Ω) are mandatory. Derate total current by 15% versus sum of individual I_D ratings to account for thermal coupling and parameter spread.