NXP Semiconductors NX5P2924DUKZ

Overview

NX5P2924DUKZ from NXP Semiconductors is a logic-controlled high-side power switch featuring an N-channel MOSFET with 18 mΩ typical ON resistance at 1.2 V and 1.8 V supply, 2.5 A continuous current capability, slew-rate-controlled turn-on, and integrated output pull-down for fast capacitive load discharge. It operates from 0.8 V to 5.5 V and is used in power domain isolation for battery life extension in portable electronics.

For engineers reviewing the NX5P2924DUKZ datasheet, NX5P2924DUKZ pinout, NX5P2924DUKZ application, or NX5P2924DUKZ equivalent, key selection criteria include input voltage compatibility with low-voltage processors, thermal performance in WLCSP6 packaging, discharge resistance value (1.25 kΩ), enable logic level translation, and OFF-state leakage current (<7.5 μA at 5.5 V).

Technical Context

The NX5P2924DUKZ integrates a charge pump and slew rate control circuit to manage in-rush current during turn-on while maintaining precise timing control across its 0.8–5.5 V input range. Its enable input supports logic-level translation, allowing direct interface with sub-1.2 V controllers without external level shifters.

When disabled, the internal discharge transistor actively pulls VOUT to GND through a 1.25 kΩ resistor until VOUT drops below 10% of VIN, preventing floating outputs and ensuring predictable power sequencing. The device is specified over –40 °C to +85 °C ambient and features ESD protection exceeding 5000 V HBM and 1000 V CDM.

Key Specifications

Pinout & Package

Package: WLCSP6 (SOT1381-2), wafer-level chip-scale package measuring 1.39 mm × 0.89 mm × 0.465 mm with 0.5 mm pitch and solder bumps on bottom side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS22919DNYR and BD65240GUL, the NX5P2924DUKZ delivers superior integration in minimal footprint (1.39 × 0.89 mm), native low-voltage enable compatibility, and autonomous discharge-making it optimal for space-constrained, battery-sensitive portable designs where layout simplicity and leakage minimization are critical.

Availability

NX5P2924DUKZ is available at Aetrix Electronics and suitable for smartphone power management, digital camera module control, wireless headphone battery optimization, and portable medical sensor hub applications requiring stable component supply and long-term lifecycle support.

Supply support for NX5P2924DUKZ 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 consumer markets.

The NX5P2924DUKZ belongs to NXP's NX5P family of ultra-small, low-voltage load switches designed specifically for power domain isolation in space- and energy-constrained portable electronics.

FAQ

What is the maximum continuous current rating for the NX5P2924DUKZ?

The NX5P2924DUKZ supports 2.5 A of continuous output current under recommended operating conditions (T_amb ≤ +85 °C, proper PCB copper layout). This rating assumes adequate thermal dissipation via the WLCSP6 package's solder bumps and underlying PCB copper layers, as specified in the thermal characteristics section of the datasheet.

Does the NX5P2924DUKZ require an external pull-down resistor on the EN pin?

No, the NX5P2924DUKZ does not require an external pull-down on EN. Its enable input has defined logic thresholds (V_IL ≤ 0.6 V, V_IH ≥ 1.2 V) and internal biasing that ensures predictable HIGH/LOW interpretation without external components. However, a weak external pull-down may be added for robustness in noisy environments.

How does the NX5P2924DUKZ handle output discharge when disabled?

When the EN pin is driven LOW, the NX5P2924DUKZ automatically activates an internal discharge transistor connecting VOUT to GND through a 1.25 kΩ typical resistance. This discharges capacitive loads rapidly and disconnects once VOUT falls below 10% of VIN, eliminating the need for external discharge circuitry.

Can the NX5P2924DUKZ operate with a 0.9 V input supply?

Yes, the NX5P2924DUKZ is fully specified for operation from 0.8 V to 5.5 V. At 0.9 V input, its ON resistance is 19 mΩ typical, enable threshold remains functional (V_IH = 0.9 V min), and supply current stays within datasheet limits - making it suitable for emerging ultra-low-voltage subsystems.

What is the thermal resistance (R_th(j-a)) of the NX5P2924DUKZ in standard PCB layout?

The NX5P2924DUKZ has a typical junction-to-ambient thermal resistance of 139 K/W under standard two-layer PCB conditions (T_amb = 85 °C). This value assumes all pins are solidly connected to large copper areas; reducing R_th(j-a) further requires multi-layer board design with internal ground/power planes acting as heat spreaders.