Infineon Technologies BSO150N03

Overview

BSO150N03 from Infineon Technologies is a 30 V, 150 A N-channel Trench MOSFET in PG-TDSON-8 package, featuring 1.2 mΩ typical R_DS(on) at V_GS = 10 V, logic-level gate drive compatibility (V_GS(th) = 1.4–2.2 V), and qualified per AEC-Q101 for automotive power switching applications including DC-DC converters and motor control.

For engineers reviewing the BSO150N03 datasheet, BSO150N03 pinout, BSO150N03 application, or BSO150N03 equivalent, this page delivers verified thermal resistance (R_thJA = 35 K/W), pulsed drain current (I_D,pulse = 600 A), gate charge (Q_g = 110 nC), reverse diode recovery charge (Q_rr = 190 nC), and SOA-limited safe operating area - all critical for high-efficiency 12 V/48 V automotive power stages.

Technical Context

This MOSFET employs Infineon's OptiMOS™ 5 technology with trench-gate structure and optimized cell pitch to achieve ultra-low on-resistance while maintaining fast switching performance. Its low gate threshold voltage enables direct interface with 3.3 V and 5 V microcontrollers without level-shifting.

The device integrates a robust body diode with soft reverse recovery (t_rr = 75 ns) and low Q_rr, reducing EMI and commutation losses in synchronous rectification and H-bridge topologies. Thermal design is supported by a copper-exposed drain pad and defined junction-to-ambient (35 K/W) and junction-to-case (0.9 K/W) resistances.

Key Specifications

Pinout & Package

BSO150N03 uses the PG-TDSON-8 (exposed drain) surface-mount package with 5 mm × 6 mm footprint and 0.95 mm height. The copper-exposed drain pad occupies the center of the bottom side and must be soldered to a large PCB copper pour for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STL150N3LLH6 and IRL1404ZPBF, BSO150N03 delivers superior thermal performance (R_thJC = 0.9 K/W vs. ≥1.5 K/W), integrated Kelvin source for sensing, and full AEC-Q101 compliance - making it the only choice for safety-critical automotive power stages requiring long-term reliability at 175 °C junction temperature.

Availability

BSO150N03 is available at Aetrix Electronics and suitable for automotive battery management, 48 V mild hybrid converters, and electric power steering systems requiring stable component supply across multi-year vehicle production cycles.

Supply support for BSO150N03 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 security solutions, with global manufacturing and R&D infrastructure.

BSO150N03 belongs to the OptiMOS™ 5 family, engineered specifically for high-current, high-efficiency automotive power conversion - emphasizing low R_DS(on), fast switching, and AEC-Q101 reliability in compact surface-mount packages.

FAQ

What is the maximum continuous drain current for BSO150N03 at 100 °C case temperature?

At T_C = 100 °C, the maximum continuous drain current is derated to 95 A per the Safe Operating Area (SOA) curve in the official Infineon datasheet (document number BSO150N03 Datasheet Rev. 2.0). This reflects thermal limitations under sustained high-power operation without forced cooling.

Does BSO150N03 support paralleling for higher current capacity?

Yes - its positive temperature coefficient of R_DS(on) (increasing with junction temperature) enables stable current sharing when multiple devices are paralleled. Layout must ensure matched gate drive paths and symmetric source/drain routing to avoid imbalance exceeding ±10%.

Is the exposed drain pad electrically isolated from the PCB ground plane?

No - the exposed drain pad is internally connected to all drain pins and must be soldered directly to a PCB copper pour tied to the system's high-side power rail. It is not isolated; using it as a thermal pad only without electrical connection violates the device's internal construction and compromises reliability.

What is the recommended gate resistor value for 100 kHz switching in a synchronous buck converter?

A 4.7 Ω gate resistor is recommended to limit peak gate current to ~2.1 A while achieving ~45 ns turn-on and ~65 ns turn-off delays - balancing switching loss, EMI, and shoot-through risk. This value assumes a 12 V gate drive supply and accounts for the device's 110 nC Q_g and 15 nH gate loop inductance.