ADP7104ACPZ-1.5-R7

Overview

The ADP7104ACPZ-1.5-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc., featuring a fixed 1.5 V output voltage and an input range of 3.3 V to 20 V. It delivers up to 500 mA of output current with a typical quiescent current of 900 μA at full load and less than 40 μA in shutdown mode. The device provides an initial accuracy of ±0.8% and maintains accuracy within −2% to +1% across the full temperature range from −40°C to +125°C. It incorporates reverse current protection, foldback current limiting, and thermal overload protection.

Feature Summary

• Provides low noise performance with 15 µV rms output noise for fixed output versions.
• Features high power supply rejection ratio (PSRR) of 60 dB at 10 kHz.
• Includes a user-programmable precision undervoltage lockout function via the EN/UVLO pin.
• Offers a digital power-good indicator to monitor output voltage health.

Applications

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

Procurement Notes

Verify that the specific suffix -R7 corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the component meets all relevant environmental compliance standards applicable to your manufacturing region before finalizing procurement orders.

Selection Notes

Select this component when a stable 1.5 V rail is required from higher voltage sources up to 20 V. Ensure the application utilizes ceramic capacitors with X5R or X7R dielectrics to maintain stability. Verify that the PCB layout supports the thermal requirements for the LFCSP package if operating near maximum current limits.

Part Context

This part belongs to the ADP7104 family of high input voltage LDO regulators designed for analog and mixed-signal circuits. The family includes various fixed output options ranging from 1.5 V to 9 V, as well as adjustable versions. The ADP7104 series is characterized by its ability to operate with small output capacitors while maintaining excellent transient response.

Replacement Considerations

Direct replacements include other ADP7104 variants with different fixed output voltages, such as ADP7104ACPZ-1.8-R7 or ADP7104ACPZ-3.3-R7, provided the system design accommodates the voltage change. Adjustable versions like ADP7104ACBZ-ADJ-R7 can also serve as substitutes if external feedback resistors are added to set the desired voltage.

FAQ

What is the minimum recommended capacitance for the ADP7104ACPZ-1.5-R7?

A minimum of 1 µF capacitance with an ESR of 1 Ω or less is recommended to ensure stability and optimal transient response.

How does the ADP7104 handle reverse current flow?

The device incorporates reverse current protection circuitry that prevents current from flowing backwards through the pass element when the output voltage exceeds the input voltage.