STMicroelectronics STL4P2UH7

Overview

STL4P2UH7 from STMicroelectronics is a P-channel enhancement-mode Power MOSFET in PowerFLAT™ 2x2 package, rated for 20 V V_DS, 0.087 Ω typical R_DS(on) at V_GS = 4.5 V, and 4 A continuous drain current at T_pcb = 25 °C. It delivers ultra-low gate drive power loss and high avalanche ruggedness for compact DC-DC load switches and battery protection circuits.

For engineers reviewing the STL4P2UH7 datasheet, STL4P2UH7 pinout, STL4P2UH7 application, or STL4P2UH7 equivalent, key selection criteria include logic-level gate compatibility (V_GS(th) down to 0.4 V), thermal resistance (R_thj-pcb = 52 °C/W on 1 in² FR-4), and pulsed current capability (I_DM = 16 A) in space-constrained PCB layouts.

Technical Context

This P-channel MOSFET uses ST's STripFET™ VII DeepGATE™ process to achieve low input/output capacitance (C_iss = 510 pF, C_oss = 66 pF) and fast switching (t_d(on) = 9 ns, t_f = 19 ns) with minimal gate charge (Q_g = 4.8 nC at V_GS = 4.5 V). Its negative threshold voltage polarity enables high-side switching without level shifters.

The device integrates a robust intrinsic body diode (V_SD = 1 V at I_SD = 1 A, t_rr = 12.8 ns) and operates up to 150 °C junction temperature. Absolute maximum ratings include ±8 V V_GS, 20 V V_DS, and 2.4 W total dissipation at T_pcb = 25 °C.

Key Specifications

Pinout & Package

STL4P2UH7 is housed in a surface-mount PowerFLAT™ 2x2 package (2.0 mm × 2.0 mm × 0.8 mm), featuring exposed drain pad for thermal and electrical performance. The 6-pin configuration uses pins 1, 2, 3, and 6 as Drain (D), pin 4 as Source (S), and pin 3 as Gate (G) - confirmed by internal schematic and mechanical drawing Fig. 16/17.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel logic-level power switch applications.

Compared with AO3401 and SI2301DS, STL4P2UH7 offers superior combination of ultra-low threshold voltage, lowest R_DS(on), and documented avalanche ruggedness - making it optimal for high-reliability, space-constrained, logic-driven power switching where thermal and dynamic performance are critical.

Availability

STL4P2UH7 is available at Aetrix Electronics and suitable for battery protection circuits, USB Type-C power delivery sinks, DC-DC synchronous buck high-side switches, and industrial sensor node power management requiring stable component supply across long-lifecycle designs.

Supply support for STL4P2UH7 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 for automotive, industrial, and consumer markets.

The STL4P2UH7 belongs to ST's STripFET™ VII DeepGATE™ Power MOSFET product line, engineered specifically for high-efficiency, logic-level-controlled power switching in space- and thermal-constrained applications.

FAQ

Is STL4P2UH7 suitable for high-side switching in 12 V automotive circuits?

No - its 20 V V_DS rating provides only 2 V margin above nominal 12 V systems, and automotive load-dump transients exceed 24 V. It is appropriate for 5 V or 3.3 V domain power switching, USB-C PD, and consumer-grade battery management where supply rails remain ≤16 V.

What is the recommended PCB layout for thermal performance?

Maximize copper area under the exposed drain pad using ≥4 thermal vias (0.3 mm diameter) connected to an internal ground plane. Maintain ≥0.5 mm clearance between S and G traces, and use ≥0.25 mm trace width for D and S connections to handle 4 A continuous current with <20 °C rise.

Does STL4P2UH7 require a gate resistor for ESD protection?

A series gate resistor (10–100 Ω) is recommended to dampen ringing and limit peak gate current during fast edge transitions, especially when driven by low-impedance sources. While not required for basic ESD immunity, it improves switching reliability and reduces electromagnetic emissions in noisy environments.

Can STL4P2UH7 replace an N-channel MOSFET in a high-side configuration?

Yes - as a P-channel device, it simplifies high-side switching by eliminating the need for a floating gate driver or charge pump. However, its R_DS(on) is inherently higher than comparable N-channel devices; verify that 0.087 Ω meets your conduction loss budget before substitution in existing N-ch designs.