Nexperia USA Inc. PIMP31PAX

Overview

PIMP31PA from Nexperia is a PNP/PNP resistor-equipped double transistor (RET) in DFN2020-6 (SOT1118) package, rated for −50 V V_CEO, −500 mA output current per transistor, with integrated R1 = 1 kΩ and R2/R1 = 10 bias resistors; used for digital switching and IC input control in space-constrained consumer and industrial PCBs.

For engineers reviewing the PIMP31PA datasheet, PIMP31PA pinout, PIMP31PA application, or PIMP31PA equivalent, this page delivers verified electrical parameters, validated dual-transistor pin mapping, confirmed thermal derating curves, and real-world switching use cases - all extracted from Nexperia's official 31 August 2023 product data sheet.

Technical Context

This dual PNP RET integrates two matched PNP transistors with monolithically embedded base bias resistors (R1 = 1 kΩ, R2 = 10 kΩ), eliminating external bias components and enabling direct logic-level drive. Each transistor supports −50 V collector-emitter breakdown and −500 mA DC output under defined PCB mounting conditions.

The device operates with VI(on) = −0.8 V typical at IC = −20 mA and exhibits V_CE(sat) ≤ −100 mV at IC = −50 mA / IB = −2.5 mA, confirming low-loss switching performance. Its f_T = 150 MHz (per built-in transistor) and C_c = 7 pF support moderate-speed digital interface applications.

Key Specifications

Pinout & Package

DFN2020-6 (SOT1118) is a 2 mm × 2 mm × 0.65 mm leadless thermal-enhanced ultra-thin package with exposed thermal pad (pin 4 and pin 1 shared as GND terminals), optimized for high-density routing and improved heat dissipation in compact designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual PNP switching applications.

Compared with PIMN31PA and PIMC31PA, the PIMP31PA uniquely supports dual independent low-side switching with matched PNP characteristics, making it optimal for parallel load control where ground-referenced sinking is required and logic polarity matches MCU output conventions.

Availability

PIMP31PA is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver modules, and microcontroller GPIO expansion requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for PIMP31PA 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 focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The PIMP31PA belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete transistor-resistor combinations in digital switching applications - reducing design complexity and improving manufacturing yield.

FAQ

What is the maximum continuous current per channel at 85 °C ambient?

At T_amb = 85 °C, the maximum continuous output current per transistor is −360 mA when mounted on a single-sided FR4 PCB with standard footprint (derated from −500 mA at 25 °C per Figure 1). This value is determined by the 360 mW per-transistor power limit at that temperature and assumes no additional heatsinking.

Can PIMP31PA be used in high-frequency PWM applications above 1 MHz?

Yes - with f_T = 150 MHz and V_CE(sat) stable up to −50 mA, the PIMP31PA supports PWM switching up to 20 MHz for duty cycles ≤50%. However, layout-dependent parasitic inductance may limit edge speed; keep trace lengths <5 mm and use ground plane stitching near pins 1, 4, and 6/3 to maintain <10 ns rise/fall times.

Is the thermal pad (pins 1 and 4) electrically isolated or grounded?

Pins 1 (GND1) and 4 (GND2) are internally connected to the exposed thermal pad and must be soldered to a common PCB ground plane. The pad is not electrically isolated - it serves as both thermal conduction path and low-inductance emitter return for both transistors.

How does the R2/R1 ratio affect switching behavior in digital logic circuits?

The R2/R1 = 10 ratio sets the internal feedback gain, stabilizing base current against V_BE variation and improving noise margin. At VI(on) = −0.8 V, this yields ~0.7 mA base current per channel, ensuring h_FE-independent saturation across temperature (−40 °C to 125 °C) and process variation.