NXP Semiconductors PMF63UN,115

Overview

PMF63UN from Nexperia is a single N-channel enhancement-mode Trench MOSFET in SOT323 (SC-70) package, designed for low-side switching with 20 V V_DS, 63 mΩ R_DS(on) at V_GS = 4.5 V and 1.8 A I_D, enabling compact relay drivers and high-speed line drivers in space-constrained PCBs.

For engineers reviewing the PMF63UN datasheet, PMF63UN pinout, PMF63UN application, or PMF63UN equivalent, key selection criteria include its low 0.7 V gate threshold voltage, fast 8 ns turn-on delay, 2.2 nC total gate charge, and thermal resistance of 308 K/W (junction-to-ambient, FR4 with 6 cm² drain pad), critical for thermally constrained loadswitch designs.

Technical Context

This device uses Trench MOSFET technology to achieve low R_DS(on) and fast switching with minimal gate drive requirements. Its 0.4–1.0 V V_GS(th) range ensures reliable turn-on with 1.8 V logic-level signals, while sub-1 V V_SD forward voltage supports efficient source-drain diode conduction during flyback recovery.

The PMF63UN features dynamic parameters optimized for high-frequency operation: 185 pF C_iss, 27 pF C_rss, and 27 ns rise time at V_DS = 10 V, ID = 1.8 A, RG(ext) = 6 Ω - confirming suitability for >1 MHz switching in low-power DC-DC and signal routing applications.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 2.2 mm footprint, 0.95 mm height, 3-pin configuration with exposed drain pad for thermal relief.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN2016LFG-7 and BSS138BKS,115, the PMF63UN uniquely balances 1.8 A current handling, 63 mΩ on-resistance, and 0.7 V gate threshold in the ultra-compact SOT323 footprint - making it optimal for space- and voltage-constrained low-side switching where both performance and miniaturization are critical.

Availability

PMF63UN is available at Aetrix Electronics and suitable for relay drivers, high-speed line drivers, and low-side loadswitches requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for PMF63UN 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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, computing, consumer, and wearable markets.

The PMF63UN belongs to Nexperia's TrenchMOS portfolio, engineered specifically for high-efficiency, low-voltage switching in space-constrained applications where fast turn-on, low gate charge, and thermal reliability are essential.

FAQ

What is the maximum continuous drain current for PMF63UN at 100 °C ambient temperature?

The PMF63UN supports 1.1 A continuous drain current at T_amb = 100 °C, as specified in Table 5 (Limiting values). This derating reflects thermal constraints of the SOT323 package without enhanced copper pour; using a 6 cm² drain pad improves thermal resistance and allows higher current in real-world layouts. The PMF63UN datasheet confirms this value under V_GS = 4.5 V conditions.

Does PMF63UN have a built-in body diode, and what is its forward voltage?

Yes, the PMF63UN integrates a source-drain body diode with V_SD = 0.8 V (typ) at I_S = 0.8 A and T_j = 25 °C, per Table 7. This diode enables freewheeling current in inductive loads like relay coils and motors, eliminating the need for an external Schottky diode in many low-power switching circuits. The PMF63UN's diode is intrinsic to its MOSFET structure and rated for continuous 0.8 A conduction.

Can PMF63UN be driven directly by a 1.8 V microcontroller GPIO pin?

Yes, the PMF63UN has a typical gate threshold voltage of 0.7 V and guaranteed maximum of 1.0 V, allowing full enhancement with 1.8 V gate drive. Its low 2.2 nC total gate charge further ensures rapid turn-on without excessive drive strength. This makes the PMF63UN compatible with 1.8 V I/O domains found in modern ultra-low-power MCUs - a key advantage over higher-threshold MOSFETs that require level shifters. The PMF63UN specification explicitly validates this use case.

What is the thermal resistance junction-to-ambient for PMF63UN on a standard FR4 PCB?

The PMF63UN exhibits R_th(j-a) = 395–455 K/W on a standard FR4 PCB (single-sided copper, tin-plated, no extended pad), per Table 6. With a 6 cm² drain mounting pad, this improves to 308–355 K/W - a 22% reduction critical for sustaining 1.8 A continuous current. These values are measured per IEC 60134 and define realistic thermal limits for layout design. The PMF63UN datasheet provides both conditions to guide thermal optimization.

Is PMF63UN suitable for automotive applications?

No, the PMF63UN is not automotive-qualified. As stated in Section 12.4 of the datasheet, "Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use." It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation beyond −55 °C to +150 °C junction range. For automotive designs, engineers must select explicitly qualified Nexperia parts - the PMF63UN is intended for industrial, computing, and consumer applications.