NXP Semiconductors BUK213-50Y,118

Overview

BUK213-50Y from NXP Semiconductors (formerly Philips) is a monolithic, temperature- and overload-protected single-channel high-side power switch based on TOPFET™ TrenchMOS technology. It delivers 8.5 A continuous load current, 100 mΩ typical on-state resistance at 25 °C, and operates from 5.5 V to 35 V supply voltage. It integrates diagnostic status indication, reverse battery protection, and negative load clamping - deployed in automotive body control modules for 12 V/24 V grounded inductive loads.

For engineers reviewing the BUK213-50Y datasheet, BUK213-50Y pinout, BUK213-50Y application, or BUK213-50Y equivalent, key selection criteria include its SOT426 (D2-PAK) thermal performance (R_th(j-mb) = 2.1–2.6 K/W), integrated overtemperature shutdown (150–190 °C trip), and open-drain status output with low-current detect capability (150–450 mA threshold).

Technical Context

The BUK213-50Y implements a high-side switching architecture with internal charge pump, voltage regulator, and protection logic including undervoltage lockout (4.2 V threshold), overvoltage shutdown (40–50 V), and short-circuit detection via battery-load voltage monitoring (V_BL(TO) = 8–25 V). Its control logic interprets input state, supply conditions, and load behavior per a defined truth table to drive the Power TrenchMOS output stage.

Protection functions operate autonomously: overtemperature latches status LOW until junction cools below hysteresis (ΔT_j(TO) = 10 °C); short-circuit response occurs within 180–250 µs; and low-current detection activates when load current falls below 90–600 mA. The mounting base serves as both thermal interface and battery connection point.

Key Specifications

Pinout & Package

SOT426 (D2-PAK) package: 5-pin surface-mount plastic package with isolated mounting base acting as battery terminal (pin 3) and primary thermal path. Pin 3 is internally connected to battery; no external connection is possible to that pin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with BUK213-50Y, BTS50085-1TAD adds digital control at the cost of increased complexity and larger footprint, while VNQ7E100AJTR trades thermal performance and current capacity for package miniaturization - neither offers pin-to-pin compatibility or identical thermal mounting.

Availability

BUK213-50Y is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, truck lighting systems, and off-board battery management requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BUK213-50Y 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 leader focused on automotive, industrial, and IoT applications, with deep heritage in power management and automotive-grade analog ICs.

The BUK213-50Y belongs to NXP's TOPFET™ high-side switch family, designed specifically for robust, protected load switching in harsh automotive environments where reliability, diagnostics, and thermal resilience are critical.

FAQ

What is the maximum continuous load current rating for the BUK213-50Y?

The BUK213-50Y supports 8.5 A continuous load current when the mounting base temperature remains at or below 112 °C. This rating assumes proper PCB copper area or heatsinking to maintain thermal resistance from junction to mounting base at 2.1–2.6 K/W. At elevated temperatures or reduced thermal management, derating applies per the datasheet curves.

Does the BUK213-50Y require an external pull-up resistor on the status pin?

Yes, the BUK213-50Y status pin (S, Pin 4) is an open-drain output and requires an external pull-up resistor to a logic supply (e.g., 5 V or 12 V). The datasheet recommends 47 kΩ for standard operation. Without this resistor, the status pin cannot assert a logic HIGH to indicate normal operation or fault conditions.

Can the BUK213-50Y withstand reverse battery connection?

The BUK213-50Y tolerates −16 V continuous reverse battery voltage when used with external series resistors (RI and RS ≥3.3 kΩ) on input and status lines, and when the connected load limits reverse current. Its internal ground resistor helps manage reverse ground current, but external protection remains essential for full compliance.

How does the BUK213-50Y handle inductive load turn-off?

The BUK213-50Y provides integrated negative load clamping: during inductive turn-off, the L-pin (Pin 5) is clamped to −20 to −30 V, safely dissipating stored energy without requiring an external flyback diode. This feature reduces component count and PCB area while ensuring reliable operation with solenoids, relays, and motors.

What is the thermal resistance from junction to mounting base for the BUK213-50Y?

The BUK213-50Y has a junction-to-mounting-base thermal resistance (R_th(j-mb)) of 2.1–2.6 K/W. This low value reflects its D2-PAK (SOT426) package design, where the mounting base serves as the primary thermal interface. Effective heat transfer requires direct metal-to-metal contact between the base and a heatsink or large copper plane.