Nexperia USA Inc. PMX400UPZ

Overview

PMX400UPZ from Nexperia is a P-channel enhancement-mode Trench MOSFET in a DFN0603-3 (SOT8013) package, designed for high-side load switching and battery protection circuits. It features −20 V drain-source voltage rating, 334 mΩ typical R_DS(on) at V_GS = −4.5 V, −900 mA continuous drain current at 25 °C, and ultra-small 0.63 × 0.33 × 0.25 mm footprint-enabling space-constrained portable electronics.

For engineers reviewing the PMX400UPZ datasheet, PMX400UPZ pinout, PMX400UPZ application, or PMX400UPZ equivalent, this device is selected for low-threshold, low-profile power switching where board area, thermal resistance (R_th(j-sp) = 23 K/W), and fast switching (t_d(off) = 7 ns) are critical design constraints.

Technical Context

This MOSFET employs Trench technology to achieve low gate charge (Q_G(tot) = 1.6–2.4 nC) and low threshold voltage (V_GS(th) = −0.5 to −0.9 V), enabling direct interfacing with 1.8 V and 2.5 V logic controllers without level shifting. Its symmetrical source-drain diode (V_SD = −0.9 to −1.2 V at I_S = −0.5 A) supports bidirectional blocking in battery-switching topologies.

The device operates across −55 °C to 150 °C junction temperature range, with thermal resistance from junction to solder point (R_th(j-sp)) as low as 23 K/W on a 1 cm² drain pad-critical for sustained operation in thermally dense wearable and IoT modules.

Key Specifications

Pinout & Package

Package: DFN0603-3 (SOT8013), leadless ultra-small plastic package measuring 0.63 mm × 0.33 mm × 0.25 mm with 0.225 mm pitch and exposed drain pad for thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN2020LFG-7 and AO3401, PMX400UPZ delivers optimal trade-off for miniaturized battery-powered designs: smallest footprint, lowest gate charge, and guaranteed 1.8 V logic compatibility-without sacrificing safe operating area or thermal robustness.

Availability

PMX400UPZ is available at Aetrix Electronics and suitable for battery protection switches, high-speed line drivers, high-side load switches, and portable sensor power gating requiring stable component supply across consumer electronics, wearables, and IoT edge nodes.

Supply support for PMX400UPZ 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

Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for mass-market electronics.

PMX400UPZ belongs to Nexperia's ultra-small-signal MOSFET product line, engineered specifically for space- and power-constrained portable applications where traditional SOT packages cannot fit.

FAQ

What is the maximum continuous drain current for PMX400UPZ at 100 °C ambient?

The maximum continuous drain current is −500 mA at T_amb = 100 °C, as specified in Table 5 (Limiting values). This derating reflects thermal limits on an FR4 PCB with single-sided copper and standard footprint-no additional heatsinking assumed.

Can PMX400UPZ be used with 1.8 V microcontroller GPIOs without a level shifter?

Yes. With a typical V_GS(th) of −0.7 V and maximum of −0.9 V, PMX400UPZ fully enhances at V_GS = −1.8 V, enabling direct drive from 1.8 V logic outputs. Verified by transfer characteristics (Fig. 10) showing >500 mA ID at V_GS = −1.8 V and T_j = 25 °C.

Is the drain pad electrically isolated from other terminals?

No-the drain terminal (Pin 3) is internally and externally connected to the bottom-side exposed metal pad. This pad must be soldered to a dedicated PCB copper pour for both electrical connection and thermal conduction; it is not insulated.

What is the safe operating area (SOA) limitation at DC and 10 µs pulse widths?

At DC (T_sp = 25 °C), SOA is limited by P_tot = 4.7 W (junction-to-solder-point), corresponding to ~2.2 A at V_DS = −2 V. At 10 µs pulse width, peak drain current reaches −3.4 A (Table 5), constrained by thermal inertia-not bondwire fusing-per Fig. 3.