ADP7182AUJZ-5.0-R7

Overview

The ADP7182AUJZ-5.0-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc., designed for negative voltage regulation. It operates within an input voltage range of −2.7 V to −28 V and delivers up to −200 mA of output current. This specific variant provides a fixed output voltage of −5 V with an initial accuracy of ±1%. The device features low noise performance, specified at 18 μV rms, and achieves a power supply rejection ratio of 66 dB at 10 kHz when the output is set to −3 V. It maintains stability using small ceramic capacitors, requiring a minimum capacitance of 2.2 μF. The quiescent current is typically −650 μA under full load conditions, while shutdown current drops to −2 μA. The component supports positive or negative enable logic for flexible control interfacing.

Feature Summary

• Provides low noise regulation suitable for sensitive analog circuits
• Operates with high input voltage ranges down to −28 V
• Ensures stability with small ceramic output capacitors
• Supports flexible enable logic compatible with positive or negative signals

Applications

• Regulation for noise-sensitive applications
• Analog-to-digital converter and digital-to-analog converter circuits
• Precision amplifier power supplies
• Communications and infrastructure systems
• Medical and healthcare equipment

Procurement Notes

Verify the exact part number against official Analog Devices documentation to ensure compatibility with system requirements. Confirm that the fixed −5 V output aligns with design specifications, as adjustable versions exist. Check package availability in TSOT-23-5 format and validate thermal management needs based on PCB layout. Ensure input voltage constraints are met within the −2.7 V to −28 V range for proper operation.

Selection Notes

Select this component when a fixed negative voltage rail is required for precision analog sections. Consider the low dropout characteristic if input voltage margins are tight. Evaluate thermal dissipation capabilities relative to the expected load current and ambient temperature. Verify that the enable pin logic levels match the controlling microcontroller or system interface. Assess capacitor selection to meet the minimum stability requirements specified in the datasheet.

Part Context

This regulator belongs to the ADP7182 series, which utilizes an advanced proprietary architecture to deliver high power supply rejection and low noise. The series is available in multiple packages including 5-lead TSOT, 6-lead LFCSP, and 8-lead LFCSP. It is designed for applications requiring regulation from higher negative rails down to lower voltage levels, supporting both fixed and adjustable output configurations depending on the specific suffix and ordering code.

Replacement Considerations

Direct substitutes include other ADP7182 variants with different output voltages or packages, such as ADP7182ACPZN-3.3-R7 or ADP7182AUJZ-3.3-R7. Cross-family replacements require verification of pinout compatibility, electrical specifications, and thermal performance characteristics.