STMicroelectronics STD36P4LLF6

Overview

STD36P4LLF6 from STMicroelectronics is a P-channel enhancement-mode Power MOSFET using STripFET™ F6 trench-gate technology, rated for 40 V V_DS, 36 A continuous drain current at T_C = 25 °C, and 0.0175 Ω typical R_DS(on) at V_GS = 10 V. It delivers high avalanche ruggedness and low gate charge (22 nC), enabling efficient high-side switching in DC-DC converters and load switches.

For engineers reviewing the STD36P4LLF6 datasheet, STD36P4LLF6 pinout, STD36P4LLF6 application, or STD36P4LLF6 equivalent, key selection criteria include its DPAK package thermal resistance (2.5 °C/W), 175 °C max junction temperature, and verified performance under pulsed ID_M = 144 A conditions - critical for automotive body control modules and industrial power distribution.

Technical Context

This P-channel MOSFET operates with reversed voltage and current polarity versus N-channel devices, requiring gate drive referenced to the source terminal. Its STripFET™ F6 architecture achieves low R_DS(on) and reduced gate charge through optimized trench depth and cell pitch, directly improving conduction and switching losses in synchronous rectification and hot-swap circuits.

The device integrates a robust intrinsic body diode with 1.1 V forward voltage at 18 A and 26 ns reverse recovery time (T_j = 150 °C), supporting fast turn-off in inductive loads. Safe operating area (SOA) is defined up to 10 ms at 40 V, validated per Figure 2 in the datasheet.

Key Specifications

Pinout & Package

STD36P4LLF6 is housed in a DPAK (TO-252) package with exposed drain tab for thermal and electrical connection. The package features gull-wing leads, surface-mount compatibility, and ECOPACK® environmental compliance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel high-current switching applications.

Compared with IRF4905PBF and DMT6009LPS-13, STD36P4LLF6 uniquely balances 36 A current handling, DPAK thermal performance (2.5 °C/W), and low 22 nC gate charge - making it optimal for high-density, high-efficiency 24–48 V power systems where board space and thermal management are co-constrained.

Availability

STD36P4LLF6 is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24 V DC power distribution, and telecom DC-DC converter sync rectifiers requiring stable component supply across multi-year production cycles.

Supply support for STD36P4LLF6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs, discrete components, and MEMS sensors for automotive, industrial, and consumer markets.

STD36P4LLF6 belongs to ST's STripFET™ F6 Power MOSFET product line, engineered specifically for high-efficiency, high-reliability power switching in 12–48 V systems where low R_DS(on), fast switching, and ruggedness are critical.

FAQ

What is the maximum safe operating voltage for STD36P4LLF6 in continuous DC operation?

The absolute maximum drain-source voltage (V_DS) is 40 V, with guaranteed avalanche capability up to this rating. For reliable long-term operation, ST recommends limiting V_DS to ≤36 V in DC applications to maintain margin against transients and temperature-induced drift. This aligns with standard 24 V automotive and industrial bus specifications.

Can STD36P4LLF6 be driven directly by a 3.3 V microcontroller GPIO?

Yes - its gate threshold voltage (V_GS(th)) ranges from 1.0 V to 2.5 V, and R_DS(on) remains low (0.024–0.029 Ω) at V_GS = 4.5 V. A 3.3 V drive fully enhances the channel for moderate currents (<15 A), though 10 V drive is required to achieve the 0.0175 Ω typical on-resistance at full 36 A load.

How is thermal performance affected if the DPAK drain tab is not soldered to a PCB thermal pad?

Without soldering the exposed drain tab to a ≥100 mm² copper pour, junction-to-ambient thermal resistance increases from ~60 °C/W (typical DPAK on 1 oz. copper) to >100 °C/W. At 36 A, this causes junction temperatures to exceed 175 °C within seconds - violating absolute maximum ratings. Full thermal pad connection is mandatory for rated current operation.

Does STD36P4LLF6 have built-in ESD protection on the gate terminal?

No - the device lacks integrated gate oxide protection diodes. Its gate-source voltage rating is ±20 V absolute maximum, and IGSS leakage is specified at ±100 nA. External Zener clamping (e.g., 12 V TVS between G and S) is recommended in systems exposed to handling or system-level ESD events per IEC 61000-4-2.