ADP7105ARDZ-3.3

Overview

The ADP7105ARDZ-3.3-R7 is a CMOS low dropout linear regulator providing a fixed 3.3 V output with up to 500 mA current capability. It operates from an input voltage range of 3.3 V to 20 V and features low noise performance of 15 µV rms. The device includes reverse current protection, programmable soft start, foldback current limiting, thermal overload protection, and a user-programmable precision UVLO/enable function. A power-good indicator monitors output health.

Feature Summary

• Provides low noise regulation suitable for sensitive analog circuits
• Includes reverse current protection for system safety
• Features programmable soft start for inrush current control
• Offers a power-good indicator for system monitoring

Applications

• Regulation of ADC and DAC circuits
• Precision amplifier power supplies
• High frequency oscillators and clocks
• PLL power regulation
• Communications and infrastructure systems

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the ARDZ designation corresponds to the SOIC package variant rather than LFCSP. Ensure the component meets RoHS compliance requirements for your assembly process. Check datasheet specifications for humidity sensitivity levels prior to storage and soldering.

Selection Notes

Select this model for applications requiring a fixed 3.3 V rail from higher input voltages up to 20 V. Consider the 8-lead SOIC package for standard surface mount assembly. Evaluate thermal dissipation requirements based on the junction-to-ambient resistance of the chosen PCB layout. Verify that the minimum output capacitance requirement is met by the selected ceramic capacitors.

Part Context

This component belongs to the ADP7105 family of high input voltage LDO regulators manufactured by Analog Devices. The series supports various fixed output voltages including 1.8 V, 3.3 V, and 5 V, as well as adjustable configurations. The family is designed for high-performance mixed-signal circuits requiring low noise and robust transient response.

Replacement Considerations

Consult the official ordering guide for direct pin-compatible alternatives within the ADP7105 series. Verify package dimensions and thermal characteristics match the existing footprint. Ensure replacement parts maintain equivalent electrical specifications for noise, dropout voltage, and current limits.