ADPL44002AUJZ-1.8-R7

Overview

The ADPL44002AUJZ-1.8-R7 is a low-dropout linear regulator manufactured by Analog Devices Inc., designed for high-voltage applications with an input voltage range up to 40 V. It provides a fixed output voltage of 1.8 V and supports a maximum output current of 200 mA. The device operates within a temperature range of -40 °C to +125 °C and features a typical power supply rejection ratio of 78 dB at 1 kHz. It utilizes an LFCSP-6 surface-mount package and includes internal protections such as overcurrent limiting, thermal shutdown, and undervoltage lockout.

Feature Summary

• Capable of regulating high input voltages up to 40 V while maintaining stable low-noise output performance
• Integrates comprehensive protection mechanisms including overcurrent limiting, thermal shutdown, and undervoltage lockout
• Delivers high power supply rejection ratio to effectively suppress input noise across varying load conditions

Applications

• High-voltage sensor biasing in industrial measurement systems
• Power management for analog front-end circuits in automotive electronics
• Voltage regulation for communication modules requiring stable low-noise supplies

Procurement Notes

Verify the specific suffix AUJZ corresponds to the required LFCSP-6 package and temperature grade when sourcing. Confirm that the fixed 1.8 V output aligns with system requirements, as adjustable variants exist within the same family. Ensure compatibility with 40 V input rails and validate thermal dissipation capabilities for the intended operating environment before finalizing procurement.

Selection Notes

Select this component when a high-voltage input capability combined with low-noise regulation is required. The fixed 1.8 V output eliminates external resistor networks, simplifying design. Consider the LFCSP-6 package for compact layouts. Verify that the 200 mA output current meets peak load demands and that the 78 dB PSRR satisfies noise sensitivity constraints for connected analog components.

Part Context

This part belongs to the ADPL44002 series of high-voltage LDO regulators from Analog Devices. The series is engineered for applications demanding robust performance under high input voltage stress. The AUJZ designation indicates the specific pin-compatible package variant optimized for surface-mount assembly, ensuring reliability in dense PCB designs common in modern electronic equipment.

Replacement Considerations

Direct substitutes include other ADPL44002 variants with different output voltages or packages, provided electrical parameters match. Cross-reference with ADP7142 series for similar performance but verify input voltage limits and package differences. Ensure any replacement maintains the 40 V input rating and 200 mA output capability.