ADPL42005ACPZ-2.5-R7

Overview

The ADPL42005ACPZ-2.5-R7 is a low-dropout linear regulator manufactured by Analog Devices Inc., designed for high-performance analog and mixed-signal circuits. It provides a fixed output voltage of 2.5V with a maximum load current capability of 500mA. The device operates within an input voltage range of 4V to 20V, ensuring stable regulation across varying supply conditions. It features a typical power supply rejection ratio (PSRR) of 58dB at 10kHz when configured for a 3.3V output, though this metric characterizes the series performance. The component exhibits low output noise of 32µVrms, independent of the output voltage setting. Initial accuracy is specified at ±0.8%, with overall precision maintained between -2% and +1% across the full operating temperature range of -40°C to +125°C.

Feature Summary

• Features user-programmable precise undervoltage lockout and enable functionality for controlled power sequencing in multi-rail systems.
• Includes a digital power-good indicator output that allows system monitors to verify normal output voltage operation.
• Incorporates comprehensive protection mechanisms including reverse current protection, foldback current limiting, and thermal overload protection.

Applications

• Powering ADC and DAC circuits requiring low-noise voltage references
• Supplying clock generators and phase-locked loops (PLLs)
• Biasing high-frequency oscillators in communication infrastructure
• Providing regulated power for medical and healthcare instrumentation

Procurement Notes

Verify the specific suffix R7 indicates reel packaging configuration upon ordering. Confirm the ACPZ designation corresponds to the LFCSP package variant required for your PCB layout. Ensure the 2.5V fixed output matches your design requirements, as other fixed voltages are available in the same series. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm pinout and electrical specifications before finalizing procurement.

Selection Notes

Select this component when designing systems requiring low noise and high PSRR for sensitive analog front ends. The 500mA output current supports moderate load demands while maintaining tight line and load regulation. Consider the wide input voltage range suitable for battery-powered or variable supply applications. Evaluate the thermal performance under maximum load conditions to ensure adequate heat dissipation within the LFCSP package constraints.

Part Context

This part belongs to the ADPL42005 series of low-dropout regulators from Analog Devices. The series is engineered for applications demanding superior noise performance and transient response. Other variants in the family offer different fixed output voltages such as 1.5V, 1.8V, 3.0V, 3.3V, and 5.0V, alongside an adjustable version. The series shares common architectural benefits including low quiescent current and robust protection features.

Replacement Considerations

Direct substitutes include other ADPL42005 variants with different fixed output voltages if the voltage level can be adjusted via external feedback or if a different fixed value is acceptable. Verify compatibility with existing PCB footprints and thermal management solutions when considering alternative packages within the same product family.