ADP7183ACPZN3.0-R7

Overview

The ADP7183ACPZN3.0-R7 is a negative-output low dropout linear regulator from Analog Devices, providing a fixed -3.0 V output with up to -300 mA current capability. It operates within an input voltage range of -2.0 V to -5.5 V and features ultralow noise of 4 μV rms (100 Hz to 100 kHz). The device offers high power supply rejection ratio (PSRR) of 75 dB at 10 kHz and a typical dropout voltage of -130 mV at full load. Packaged in an 8-lead, 2 mm × 2 mm LFCSP, it includes positive or negative enable logic, current-limit protection, and thermal overload shutdown.

Feature Summary

• Ultralow output noise performance independent of the selected output voltage level
• High power supply rejection ratio maintained across wide frequency ranges under heavy loads
• Flexible enable logic supporting both positive and negative control signal levels
• Stable operation guaranteed with small ceramic capacitors for compact board designs

Applications

• Powering analog-to-digital converters requiring clean negative rails
• Supplying precision amplifiers in instrumentation systems
• Providing regulated bias voltages for digital-to-analog converters
• Noise-sensitive regulation in medical and healthcare equipment

Procurement Notes

Verify the specific ordering suffix matches the required package and tape/reel configuration. Confirm that the fixed -3.0 V output variant aligns with system requirements rather than using the adjustable version. Check datasheet specifications for thermal derating needs based on PCB layout and ambient temperature conditions before finalizing procurement quantities.

Selection Notes

Select this component when a stable negative voltage rail is required for sensitive analog circuits. Ensure the input voltage remains within the specified operational range while accounting for dropout voltage at maximum load currents. Consider the thermal resistance characteristics of the LFCSP package if high power dissipation is expected in the application environment.

Part Context

This part belongs to the ADP7183 family of complementary metal oxide semiconductor low dropout regulators designed for high-performance mixed-signal applications. The series provides various fixed output options ranging from -0.5 V to -4.5 V alongside an adjustable variant. All members share the same compact footprint and advanced architecture optimized for ultralow noise and high PSRR.

Replacement Considerations

Direct substitutes include other ADP7183 variants with different fixed output voltages such as ADP7183ACPZN2.5-R7 or ADP7183ACPZN3.3-R7, provided the voltage level meets circuit requirements. Verify pin compatibility and thermal performance when substituting between fixed and adjustable versions.