NXP Semiconductors BUK9222-55A/C1,118

Overview

BUK9222-55A/C1,118 from Nexperia is a logic-level N-channel TrenchMOS FET in DPAK (SOT428) package, rated for 55 V V_DS, 48 A continuous drain current at T_mb = 25 °C, and 175 °C junction temperature - designed for automotive-grade power switching in 12 V/24 V systems with low R_DS(on) of 19–22 mΩ at V_GS = 5 V.

For engineers reviewing the BUK9222-55A/C1,118 datasheet, BUK9222-55A/C1,118 pinout, BUK9222-55A/C1,118 application, or BUK9222-55A/C1,118 equivalent, this part supports thermally demanding automotive loads including motors, lamps, and solenoids where AEC-Q101 compliance, avalanche ruggedness (160 mJ), and gate-drive compatibility with 4.5–5 V logic sources are critical selection criteria.

Technical Context

This device uses TrenchMOS technology to achieve low on-state resistance while maintaining robust thermal performance up to 175 °C junction temperature. Its gate threshold voltage (V_GS(th)) ranges from 0.5 V to 2.3 V across temperature, enabling reliable turn-on with standard 5 V microcontroller outputs.

The integrated source-drain diode exhibits V_SD = 0.85–1.2 V at I_S = 25 A and T_j = 25 °C, with reverse recovery time (t_rr) of 52 ns and recovered charge (Q_r) of 81 nC - supporting efficient freewheeling in inductive load switching.

Key Specifications

Pinout & Package

Package: DPAK (SOT428), plastic single-ended surface-mounted package with 3 leads (one lead cropped); mounting base electrically connected to drain for thermal and electrical integration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel logic-level power MOSFET applications.

Compared with STL220N5LF5 and IRF3205PBF, the BUK9222-55A/C1,118 uniquely delivers AEC-Q101 compliance, guaranteed 5 V logic-level operation, and DPAK thermal efficiency - making it the only option qualified for automotive 12 V/24 V load switching where safety, reliability, and board space are constrained.

Availability

BUK9222-55A/C1,118 is available at Aetrix Electronics and suitable for automotive lighting control, engine cooling fan drive, and body control module solenoid driver applications requiring stable component supply across extended production lifecycles.

Supply support for BUK9222-55A/C1,118 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.

The BUK9222-55A/C1,118 belongs to Nexperia's TrenchMOS logic-level power MOSFET product line, engineered specifically for automotive power distribution and load switching where AEC-Q101 compliance, thermal resilience, and 5 V gate drive compatibility are mandatory.

FAQ

What is the maximum continuous drain current for BUK9222-55A/C1,118 at 100 °C mounting base temperature?

The BUK9222-55A/C1,118 supports 34 A continuous drain current at T_mb = 100 °C and V_GS = 5 V, as specified in the Limiting Values table. This derating reflects thermal constraints at elevated temperatures while maintaining safe junction operation within the 175 °C limit. The BUK9222-55A/C1,118 maintains stable R_DS(on) performance across this range due to its TrenchMOS process and optimized thermal path.

Is BUK9222-55A/C1,118 pin-compatible with other DPAK-packaged N-channel MOSFETs?

The BUK9222-55A/C1,118 uses the standard SOT428 (DPAK) outline with 3 leads and drain-connected mounting base - matching mechanical footprint and pin assignment (G-D-S) of industry-standard DPAK logic-level FETs. However, electrical characteristics such as R_DS(on), Q_G, and avalanche rating differ; PCB layout reuse is possible, but circuit validation is required before substitution. The BUK9222-55A/C1,118 must be verified for thermal and switching performance in the target application.

Does BUK9222-55A/C1,118 include integrated ESD protection?

The BUK9222-55A/C1,118 does not specify integrated ESD protection diodes in its datasheet. It meets AEC-Q101 stress test requirements for human-body model (HBM) and machine model (MM), but external TVS or RC filtering is recommended for gate input in noisy automotive environments. The BUK9222-55A/C1,118 gate oxide is rated for ±15 V V_GS, and gate leakage remains below 100 nA at ±10 V, indicating robust intrinsic structure - yet system-level ESD safeguards remain the designer's responsibility.

What is the typical gate charge (Q_G) of BUK9222-55A/C1,118 at V_DD = 14 V?

While the datasheet provides gate charge curves (Figure 10) rather than a single Q_G value, extrapolation from the plot shows ~30 nC total gate charge at V_DD = 14 V and V_GS = 5 V. This value governs switching speed and driver power requirements - confirming the BUK9222-55A/C1,118 can achieve sub-100 ns turn-on delay with 10 Ω external gate resistor. The BUK9222-55A/C1,118 Q_G is optimized for logic-level drive efficiency without excessive Miller plateau duration.

Can BUK9222-55A/C1,118 be used in high-frequency PWM applications above 100 kHz?

Yes - the BUK9222-55A/C1,118 has t_d(on) = 19 ns, t_r = 124 ns, t_d(off) = 92 ns, and t_f = 93 ns at V_GS = 5 V, enabling clean switching at 100–200 kHz with appropriate gate drive strength. Its C_iss = 1660–2210 pF and C_rss = 194–266 pF support controlled dv/dt, but layout parasitics must be minimized. The BUK9222-55A/C1,118 is routinely deployed in automotive PWM lighting and fan control where EMI and efficiency are balanced via gate resistor tuning.