Overview
The ADM7171ACPZ-2.5-R7 is a CMOS, low dropout linear regulator (LDO) produced by Analog Devices Inc. This regulator operates from an input voltage range of 2.3 V to 6.5 V and provides up to 1 A of output current, making it suitable for high-performance analog and mixed-signal circuits. The device features a fast transient response, low noise, and high power supply rejection ratio (PSRR), ensuring stable and reliable voltage regulation.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Maximum Load Current | 1 A |
| Output Voltage | 2.5 V (fixed for this model) |
| Dropout Voltage | 84 mV at 500 mA load |
| Noise | 5 μV rms (100 Hz to 100 kHz) |
| Transient Response | 1.5 μs for 1 mA to 500 mA load step |
| PSRR | 60 dB at 100 kHz |
| Initial Accuracy | −0.5% (minimum), +1% (maximum) |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Quiescent Current (IGND) | 0.7 mA with no load |
| Shutdown Current | 0.25 μA at VIN = 5 V |
| Package | 8-lead, 3 mm × 3 mm LFCSP |
Key Features
- Fast transient response: 1.5 μs for 1 mA to 500 mA load step
- Low noise: 5 μV rms (100 Hz to 100 kHz)
- High PSRR: 60 dB at 100 kHz
- Low dropout voltage: 84 mV at 500 mA load
- Adjustable and fixed output voltage options: 1.2 V to 5.0 V (fixed 2.5 V for this model)
- Precision enable and adjustable soft start
- Stable with small 4.7 μF ceramic output capacitor
- Exposed pad for enhanced thermal performance
Applications
- Regulation for noise-sensitive applications: ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICs
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
Q & A
- What is the input voltage range of the ADM7171ACPZ-2.5-R7?
The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum load current the ADM7171ACPZ-2.5-R7 can provide?
The maximum load current is up to 1 A.
- What is the output voltage of the ADM7171ACPZ-2.5-R7?
The output voltage is fixed at 2.5 V for this model.
- What is the dropout voltage of the ADM7171ACPZ-2.5-R7 at 500 mA load?
The dropout voltage is 84 mV at 500 mA load.
- How does the ADM7171ACPZ-2.5-R7 perform in terms of noise?
The device has a low noise of 5 μV rms from 100 Hz to 100 kHz.
- What is the transient response time of the ADM7171ACPZ-2.5-R7?
The transient response time is typically 1.5 μs for a 1 mA to 500 mA load step.
- What is the PSRR of the ADM7171ACPZ-2.5-R7 at 100 kHz?
The PSRR is 60 dB at 100 kHz.
- What is the quiescent current of the ADM7171ACPZ-2.5-R7 with no load?
The quiescent current is 0.7 mA with no load.
- How does the ADM7171ACPZ-2.5-R7 handle shutdown current?
The shutdown current is 0.25 μA at VIN = 5 V.
- What package type is the ADM7171ACPZ-2.5-R7 available in?
The device is available in an 8-lead, 3 mm × 3 mm LFCSP package.
