ADP7104ARDZ-3.3-R7

Overview

The ADP7104ARDZ-3.3-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc. It operates from an input voltage range of 3.3 V to 20 V and provides up to 500 mA of output current. This specific variant features a fixed 3.3 V output with an initial accuracy of ±0.8%. The device delivers a low output noise of 15 µV rms and achieves a power supply rejection ratio (PSRR) of 60 dB at 10 kHz. It incorporates reverse current protection, foldback current limit, and thermal overload protection.

Feature Summary

• Provides high power supply rejection and low noise performance suitable for sensitive analog circuits
• Incorporates reverse current protection to prevent backward current flow through the pass element
• Features user-programmable precision undervoltage lockout and enable functionality via the EN/UVLO pin
• Includes a digital power-good indicator to monitor output voltage health

Applications

• Regulation for noise-sensitive applications such as ADC and DAC circuits
• Powering precision amplifiers, high frequency oscillators, clocks, and PLLs
• Communications and infrastructure systems
• Medical and healthcare equipment
• Industrial and instrumentation devices

Procurement Notes

Verify the package type matches the required PCB footprint, as the component is available in both 8-lead LFCSP and 8-lead SOIC configurations. Confirm that the fixed 3.3 V output option aligns with the system design requirements. Ensure that the selected input and output capacitors meet the minimum capacitance and ESR specifications to maintain stability under all operating conditions.

Selection Notes

Select this regulator when a wide input voltage range up to 20 V is required alongside high output current capability. Consider the low quiescent current for battery-operated portable equipment applications. Evaluate the thermal resistance characteristics relative to the chosen package and PCB layout to ensure junction temperature limits are not exceeded during operation.

Part Context

The ADP7104 belongs to a family of low dropout linear regulators designed for high-performance analog and mixed-signal circuits. It utilizes an advanced proprietary architecture to achieve excellent line and load transient response while maintaining stability with small ceramic output capacitors. The series offers multiple fixed output voltage options and an adjustable version to accommodate various rail requirements.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers within the same product family or equivalent specifications.