ADPL42005ACPZ-R7

Overview

The ADPL42005ACPZ-R7 is a low-dropout (LDO) linear regulator from Analog Devices, designed for high-performance analog and mixed-signal circuits. It operates with an input voltage range of 4V to 20V and delivers a maximum output current of 500mA. The device features a fixed 3.3V output option within its series, which includes six fixed voltages and one adjustable version. Key electrical characteristics include a low output noise of 32µVrms, independent of the output voltage, and a power supply rejection ratio (PSRR) of 58dB at 10kHz when VOUT is 3.3V. Initial accuracy is specified at ±0.8%, with overall precision ranging from -2% to +1% across temperature. It utilizes an 8-lead LFCSP package.

Feature Summary

• Provides ultra-low output noise of 32µVrms suitable for sensitive analog applications
• Features high power supply rejection ratio (PSRR) of 58dB at 10kHz
• Includes user-programmable precision undervoltage lockout (UVLO) and enable functionality
• Offers comprehensive protection against reverse current, thermal overload, and foldback current limiting

Applications

• Analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuit power supplies
• High-frequency oscillators and clock distribution networks
• Phase-locked loops (PLLs) and precision amplifiers
• Communication infrastructure and industrial instrumentation systems

Procurement Notes

Verify the specific suffix 'R7' indicates tape-and-reel packaging configuration distinct from bulk or tray options. Confirm the 'A' grade designation aligns with required temperature and performance specifications. Ensure the 3.3V fixed output variant matches the design requirement, as the ADPL42005 series offers multiple fixed voltage options. Cross-reference the 8-lead LFCSP footprint with PCB layout guidelines to ensure compatibility with existing assembly processes.

Selection Notes

Select this component for designs requiring low-noise regulation in mixed-signal environments where PSRR is critical. The 500mA current capability supports moderate load demands while maintaining tight line and load regulation. Consider the 4V minimum input voltage constraint relative to the system's available rail. The adjustable output version may be preferred if non-standard voltages are needed, though the fixed 3.3V option simplifies external component count.

Part Context

This part belongs to the ADPL42005 family of CMOS LDO regulators manufactured by Analog Devices. The family is engineered for applications demanding superior transient response and low noise. Other variants in the series provide different fixed output voltages such as 1.5V, 1.8V, 2.5V, 3V, and 5V, alongside an adjustable version. The ADPL42005ACPZ-R7 specifically denotes the 3.3V fixed output in an 8-lead LFCSP package with reel packaging.

Replacement Considerations

Direct substitutes within the same family include other ADPL42005 variants with different fixed output voltages (e.g., ADPL42005ACPZ-1.8-R7 for 1.8V). For equivalent performance in terms of current and noise, consider the ADPL42002 series, though it offers lower current capacity. Verify pinout compatibility when substituting with other LFCSP-8 regulators.