Overview
The ADM7171ACPZ-5.0-R7 is a high-performance, low dropout linear regulator (LDO) produced by Analog Devices Inc. This CMOS LDO 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 ideal for regulating high-performance analog and mixed-signal circuits. The device is particularly suited for applications requiring low noise, high power supply rejection, and fast transient response.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Maximum Load Current | 1 A |
| Output Voltage | Fixed: 5.0 V (for ADM7171ACPZ-5.0-R7), Adjustable: 1.2 V to VIN - VDO |
| Dropout Voltage | 84 mV at 500 mA load, VOUT = 5 V |
| Noise | 5 μV rms independent of output voltage at 100 Hz to 100 kHz |
| Power Supply Rejection Ratio (PSRR) | 60 dB at 100 kHz |
| Transient Response | 1.5 μs for 1 mA to 500 mA load step |
| Quiescent Current | 0.7 mA with no load |
| Shutdown Current | 0.25 μA at VIN = 5 V |
| Output Capacitor | Stable with small 4.7 μF ceramic output capacitor |
| Package | 8-lead, 3 mm × 3 mm LFCSP with exposed pad |
Key Features
- High output current up to 1 A
- Low noise: 5 μV rms independent of output voltage at 100 Hz to 100 kHz
- Fast transient response: 1.5 μs for 1 mA to 500 mA load step
- High power supply rejection ratio (PSRR): 60 dB at 100 kHz
- Low dropout voltage: 84 mV at 500 mA load, VOUT = 5 V
- Adjustable and fixed output voltage options: 1.2 V to 5.0 V
- Precision enable and adjustable soft start
- Compact 8-lead, 3 mm × 3 mm LFCSP package with 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-5.0-R7?
The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum load current of the ADM7171ACPZ-5.0-R7?
The maximum load current is up to 1 A.
- What is the output voltage of the ADM7171ACPZ-5.0-R7?
The output voltage is fixed at 5.0 V for this specific model, but adjustable versions are available.
- What is the dropout voltage of the ADM7171ACPZ-5.0-R7?
The dropout voltage is 84 mV at 500 mA load, VOUT = 5 V.
- How does the ADM7171ACPZ-5.0-R7 perform in terms of noise?
The device has low noise of 5 μV rms independent of output voltage at 100 Hz to 100 kHz.
- What is the power supply rejection ratio (PSRR) of the ADM7171ACPZ-5.0-R7?
The PSRR is 60 dB at 100 kHz.
- How fast is the transient response of the ADM7171ACPZ-5.0-R7?
The transient response is typically 1.5 μs for a 1 mA to 500 mA load step.
- What is the quiescent current of the ADM7171ACPZ-5.0-R7?
The quiescent current is 0.7 mA with no load.
- What is the shutdown current of the ADM7171ACPZ-5.0-R7?
The shutdown current is 0.25 μA at VIN = 5 V.
- What type of output capacitor is recommended for the ADM7171ACPZ-5.0-R7?
The device is stable with a small 4.7 μF ceramic output capacitor.
