PCA9421UKZ

Power Management - Specialized Overview

The PCA9421UKZ is a highly integrated Power Management IC (PMIC) from NXP Semiconductors, designed for low-power microcontroller applications. It features two DC-DC buck converters and two Low Dropout (LDO) regulators with programmable output voltages. The device supports I²C interface control and operates within an ambient temperature range of -40°C to +85°C. Key electrical parameters include a maximum load voltage of 6.8V and specific output currents: 1 mA for LDO1, 250 mA for LDO2 and Buck SW1, and 500 mA for Buck SW2. Maximum output voltage reaches 3.3 V.

Power Management - Specialized Feature Summary

• Highly integrated solution combining two buck converters and two LDOs for complete power management
• Ultra-low quiescent current in ship mode, typically 100 nA, optimized for battery-powered devices
• Programmable output voltages via I²C interface for flexible system configuration
• Supports rapid mode switching between different MCU operating states

Power Management - Specialized Applications

• Low-power microcontrollers
• i.MX RT series MCUs
• Battery-powered portable devices
• Non-portable applications powered by 5V adapters

Power Management - Specialized Procurement Notes

Verify the exact suffix UKZ against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint, specifically the WLCSP-25 or QFN options depending on the variant. Confirm that the I²C address and voltage levels match your system requirements before finalizing procurement.

Power Management - Specialized Selection Notes

Select this component when a compact PMIC is required for i.MX RT or similar low-power MCUs. It is suitable for designs needing multiple regulated rails from a single source. Consider the PCA9420 if a linear battery charger is also required, as the PCA9421 lacks this feature. Evaluate thermal performance based on the total load current across all outputs.

Power Management - Specialized Part Context

The PCA9421 belongs to the PCA942x family of PMICs developed by NXP Semiconductors. This series targets the growing market for energy-efficient embedded systems. The UKZ suffix typically denotes the WLCSP package variant. It complements other NXP components like the MIMXRT595 evaluation boards, providing essential power regulation for complex SoC architectures.

Power Management - Specialized Replacement Considerations

The PCA9420 is a direct functional alternative within the same family, distinguished by the inclusion of a linear battery charger. Verify pinout compatibility and software register mapping differences between the PCA9421 and PCA9420 before substitution. No other cross-model substitutes are officially documented.