Overview
The ADM7171ACPZ-R7 is a CMOS, low dropout linear regulator (LDO) produced by Analog Devices Inc. This high-performance LDO operates from an input voltage range of 2.3 V to 6.5 V and provides up to 1 A of output current. It is designed for regulating high-performance analog and mixed signal circuits, offering high power supply rejection, low noise, and excellent line and load transient response. The device is particularly suitable for noise-sensitive applications and is available in a compact 8-lead LFCSP package.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Output Voltage | 3.3 V (fixed) |
| Output Current | Up to 1 A |
| Power Supply Rejection Ratio (PSRR) | 60 dB at 100 kHz |
| Dropout Voltage | 42 mV at 500 mA load, VOUT = 3 V |
| Initial Accuracy | −0.5% (minimum), +1% (maximum) |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Quiescent Current | 0.7 mA at no load, VOUT = 3.3 V |
| Shutdown Current | 0.25 μA at VIN = 5 V |
| Operating Temperature Range | −40°C to +125°C |
| Package Type | 8-lead LFCSP |
Key Features
- Internal soft-start circuitry to reduce inrush current
- Output voltage monitor with open-collector output
- Safe operating area with 100% overload protection and thermal shutdown
- Fast transient response: 1.5 μs for 1 mA to 500 mA load step
- Low noise: 5 μV rms at 100 Hz to 100 kHz
- Precision enable and adjustable soft start
- Stable operation with a small 4.7 μF ceramic output capacitor
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-R7?
The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum output current of the ADM7171ACPZ-R7?
The maximum output current is up to 1 A.
- What is the typical power supply rejection ratio (PSRR) of the ADM7171ACPZ-R7?
The typical PSRR is 60 dB at 100 kHz.
- What is the dropout voltage of the ADM7171ACPZ-R7 at a 500 mA load?
The dropout voltage is 42 mV at a 500 mA load, VOUT = 3 V.
- What is the quiescent current of the ADM7171ACPZ-R7 at no load?
The quiescent current is 0.7 mA at no load, VOUT = 3.3 V.
- What is the shutdown current of the ADM7171ACPZ-R7?
The shutdown current is 0.25 μA at VIN = 5 V.
- What is the operating temperature range of the ADM7171ACPZ-R7?
The operating temperature range is from −40°C to +125°C.
- What package type is the ADM7171ACPZ-R7 available in?
The device is available in an 8-lead LFCSP package.
- What are some typical applications of the ADM7171ACPZ-R7?
Typical applications include regulation for noise-sensitive circuits, communications and infrastructure, medical and healthcare, and industrial and instrumentation.
- Does the ADM7171ACPZ-R7 have internal soft-start circuitry?
Yes, the device includes internal soft-start circuitry to reduce inrush current.
