NXP Semiconductors PMEM1505NG,115

Overview

PMEM1505NG from NXP Semiconductors is a monolithic SOT353-packaged hybrid device integrating an NPN transistor with low V_CE(sat) (25 mV at I_C = 10 mA) and a planar Schottky barrier rectifier with guard ring protection. It delivers 0.5 A continuous collector current and 0.5 A forward diode current, operating up to 15 V V_CEO and 20 V reverse diode voltage - used in DC-DC converter switching stages and inductive load drivers where board space and thermal efficiency are critical.

For engineers reviewing the PMEM1505NG datasheet, PMEM1505NG pinout, PMEM1505NG application, or PMEM1505NG equivalent, key selection criteria include verified V_CE(sat) ≤250 mV at 500 mA, Schottky VF ≤460 mV at 500 mA, integrated dual-function layout in SC-88A, and junction temperature rating of 150 °C for combined device operation.

Technical Context

The PMEM1505NG integrates two electrically isolated semiconductor elements - an NPN transistor with h_FE ≥90 at I_C = 500 mA and a Schottky rectifier with ultra-low forward voltage and Cd ≤25 pF at VR = 5 V - sharing only thermal coupling within a single SOT353 package. Both elements are rated for simultaneous operation under ambient temperatures up to +125 °C.

Its internal structure avoids parasitic coupling: the transistor's emitter (Pin 3), base (Pin 2), and collector (Pin 4) are fully independent from the diode's anode (Pin 1) and cathode (Pin 5). Thermal resistance R_th(j-a) is 410 K/W for the combined device in free air on FR4 PCB, enabling stable performance in compact power stage designs without forced cooling.

Key Specifications

Pinout & Package

SOT353 (SC-88A) plastic surface-mounted package with 5 leads; 2.2 mm × 1.8 mm footprint, 1.1 mm height, and 0.65 mm lead pitch. Standard FR4 mounting pad per JEDEC MO-203-AB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN transistor + Schottky rectifier module applications.

Compared with PMEM1505PG and DMN2004LKQ-7, the PMEM1505NG uniquely combines low-saturation NPN switching with guard-ring-protected Schottky rectification in one SC-88A package - delivering optimal trade-offs in board area, thermal coupling, and transient robustness for space-constrained inductive load interfaces.

Availability

PMEM1505NG is available at Aetrix Electronics and suitable for DC-DC converters, inductive load drivers, and reverse polarity protection circuits requiring stable component supply across industrial and automotive-grade production programs.

Supply support for PMEM1505NG 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The PMEM1505NG belongs to NXP's legacy analog discretes portfolio, designed specifically for compact, high-reliability power interface functions in cost-sensitive and space-constrained embedded systems.

FAQ

What is the maximum continuous collector current rating for the PMEM1505NG?

The PMEM1505NG has a maximum continuous collector current (I_C) rating of 0.5 A under standard FR4 PCB mounting conditions (single-sided copper, tin-plated, standard SOT353 footprint). At elevated case temperatures (T_s ≤55 °C), it supports up to 1 A peak collector current, but sustained operation above 0.5 A requires thermal derating per the datasheet's limiting values table. This rating applies exclusively to the NPN transistor section; the Schottky diode supports 0.5 A continuous forward current independently.

Does the PMEM1505NG integrate a guard ring in its Schottky diode structure?

Yes, the PMEM1505NG incorporates a planar Schottky barrier rectifier with an integrated guard ring for stress protection. As confirmed in the General Description and Features sections of the NXP datasheet, this guard ring enhances robustness against electrical overstress and transient events such as load dump or ESD, making the PMEM1505NG suitable for automotive and industrial environments where reliability under voltage spikes is critical.

What is the typical forward voltage of the Schottky diode in PMEM1505NG at 500 mA?

The typical forward voltage (V_F) of the Schottky diode in the PMEM1505NG is 400–460 mV at I_F = 500 mA and T_amb = 25 °C, as specified in Table 7 "Characteristics" of the NXP datasheet. This low V_F directly contributes to reduced conduction losses in freewheeling and reverse polarity protection applications, especially in 3.3 V and 5 V systems where voltage headroom is limited.

Can the PMEM1505NG be used as a direct replacement for discrete SOT23 NPN + Schottky combinations?

The PMEM1505NG is not a pin-compatible drop-in replacement for generic SOT23 discrete pairs due to its 5-pin SOT353 (SC-88A) footprint and unique pin assignment (anode/base/emitter/collector/cathode). However, it serves the same functional role - combining NPN switching and Schottky rectification - with superior thermal coupling and reduced PCB area. Layout redesign is required, but the PMEM1505NG offers measurable benefits in thermal performance and transient immunity over discrete alternatives.

What is the junction temperature limit for the PMEM1505NG when both transistor and diode are operating simultaneously?

The absolute maximum junction temperature (T_j) for the PMEM1505NG is 150 °C for the NPN transistor section and 125 °C for the Schottky rectifier section, as defined in Table 5 "Limiting values". When both elements operate simultaneously, the combined device thermal limit is governed by the lower value - 125 °C - to ensure reliability of the Schottky junction. The datasheet specifies a combined P_tot of 300 mW at T_amb ≤25 °C, confirming safe concurrent operation within this thermal envelope.