Infineon Technologies SPD50P03LGBTMA1

Overview

SPD50P03LGBTMA1 from Infineon Technologies is a P-channel enhancement-mode logic-level MOSFET in PG-TO252-5 package, rated for -30 V V_DS, 7 mΩ R_DS(on) at -10 V V_GS, -50 A continuous drain current, and 175 °C operation. It serves as a high-current load switch or reverse polarity protection device in automotive body control modules and industrial DC power distribution systems.

For engineers reviewing the SPD50P03LGBTMA1 datasheet, SPD50P03LGBTMA1 pinout, SPD50P03LGBTMA1 application, or SPD50P03LGBTMA1 equivalent, key selection criteria include its -50 A continuous rating at T_C=100 °C, avalanche-rated ruggedness (E_AS=150 mJ), dv/dt immunity (2 kV/µs), and logic-level gate drive compatibility down to -4.5 V.

Technical Context

This OptiMOS®-P device uses trench-based silicon technology optimized for low R_DS(on) and fast switching in high-side or low-side configurations. Its gate threshold voltage range (-1.0 to -2.0 V) ensures reliable turn-on with standard logic-level drivers, while the integrated body diode supports freewheeling in buck converters and H-bridge motor drives.

The MOSFET features fully characterized dynamic parameters including C_iss=4590–6880 pF, Q_g=95–126 nC, and t_r/t_f of 21.7–32 ns / 104–156 ns, enabling efficient operation up to 100 kHz in hard-switched topologies with minimal gate drive loss.

Key Specifications

Pinout & Package

Package: PG-TO252-5 (DPAK-5), surface-mount, thermally enhanced with exposed drain pad. Pin 1 = Gate, Pin 2 = Source, Pin 3 = Drain, Pin 4 = Source, Pin 5 = Drain (dual-drain configuration for lower R_DS(on) and improved thermal path).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRF4905PbF and IPB80P03P4L-04, SPD50P03LGBTMA1 offers optimal balance of low R_DS(on), compact PG-TO252-5 footprint, and logic-level drive-making it ideal for space-constrained 24 V industrial controls where thermal performance and gate drive simplicity are critical.

Availability

SPD50P03LGBTMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, DC-DC converter synchronous rectifiers, and reverse polarity protection circuits requiring stable component supply across multi-year production cycles.

Supply support for SPD50P03LGBTMA1 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 and discrete devices.

This part belongs to the OptiMOS®-P product line, engineered specifically for high-efficiency, high-reliability P-channel switching in 12 V and 24 V automotive and industrial power systems.

FAQ

What is the maximum safe operating temperature for SPD50P03LGBTMA1?

The junction temperature limit is +175 °C, verified per JEDEC JESD22-A108. The device maintains specified R_DS(on) and avalanche performance up to this point. Derating begins at T_C > 100 °C per the I_D vs. T_C curve on page 4 of the datasheet, where continuous current drops linearly to zero at 175 °C case temperature.

Does SPD50P03LGBTMA1 require a gate resistor for driving with a microcontroller?

Yes-a series gate resistor (typically 10–47 Ω) is recommended to dampen ringing and limit peak gate current. With Q_g = 95–126 nC and typical MCU GPIO slew rate, an uncontrolled gate drive can cause overshoot exceeding ±20 V, risking gate oxide damage. The resistor also reduces EMI from fast edge rates.

Can SPD50P03LGBTMA1 be used in parallel with identical units?

Yes, but only with matched gate drive routing and Kelvin-source connections. The device's negative temperature coefficient of R_DS(on) (see Figure 9) promotes current sharing, but layout asymmetry in gate or source paths will cause imbalance. Parallel operation beyond two units requires individual gate resistors and thermal monitoring per unit.

Is the body diode suitable for continuous freewheeling in a buck converter?

Yes-the body diode supports -50 A continuous forward current (I_S) at T_C = 100 °C, with V_SD = 1.0–1.65 V at 50 A and 25 °C. However, its reverse recovery charge (Q_rr = 46–57 nC) and time (t_rr = 38–47 ns) are higher than SiC Schottkys, so synchronous rectification is preferred for >50 kHz operation to minimize switching loss.