ADM7171ACPZ-3.3-R7

The ADM7171ACPZ-3.3-R7 is a high-performance CMOS LDO linear regulator manufactured by Analog Devices. It is designed for noise-sensitive applications, offering ultralow noise of 5 μV rms and high PSRR of 60 dB at 100 kHz. The regulator operates from an input voltage range of 2.3 V to 6.5 V and can deliver a maximum load current of 1 A.

Key electrical characteristics include a fast transient response of 1.5 μs for a 1 mA to 500 mA load step and a low dropout voltage of 42 mV at 500 mA load when VOUT is 3 V. The initial accuracy is within -0.5% to +1%, with an accuracy over line, load, and temperature of ±1.5%. Quiescent current is 0.7 mA with no load, and shutdown current is a low 0.25 μA.

This LDO is available in fixed and adjustable output voltage options ranging from 1.2 V to 5.0 V. It is suitable for applications such as ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICs. The device is housed in an 8-lead, 3 mm × 3 mm LFCSP package, requiring a small 4.7 μF ceramic output capacitor for stability.

The ADM7171ACPZ-3.3-R7 supports precision enable and adjustable soft start features, with a typical start-up time of 1.0 ms when using a 1 nF soft start capacitor. It is well-suited for communications, infrastructure, medical, healthcare, and industrial instrumentation applications.