This document describes the features and characteristics of the ADP7182 low noise linear regulator, including low noise, good power supply rejection ratio, positive or negative enable logic, and small output capacitor size.
The ADP7182 is a high input voltage LDO ideal for regulating high performance analog and mixed signal circuits operating from negative rails down to -1.2 V. It features low noise (18 μV rms) and high power supply rejection ratio, achieving excellent line and load transient response with a small 2.2 μF ceramic output capacitor.
The device is available in fixed output voltage versions (-5 V, -1.8 V, -2.5 V, -3 V, etc.) and an adjustable version allowing the output to range from -1.22 V to -V IN + V DO via an external feedback divider. It supports positive or negative enable logic for maximum flexibility.
| Input Voltage Range | -2.7 V to -28 V |
|---|---|
| Maximum Output Current | -200 mA |
| Output Noise (Fixed) | 18 μV rms |
| Power Supply Rejection Ratio | 66 dB at 10 kHz |
| Dropout Voltage | -185 mV at -200 mA load |
| Quiescent Current | -650 μA with -200 mA load |
| Shutdown Current | -2 μA |
The device operates from -2.7 V to -28 V.
It provides up to -200 mA of output current.
Yes, it is available as an adjustable version allowing the output voltage to range from -1.22 V to -V IN + V DO.