Overview
The ADM7171ACPZ-4.2-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 ideal for regulating high-performance analog and mixed-signal circuits operating from 6 V down to 1.2 V rails. The device features an advanced proprietary architecture that ensures high power supply rejection and low noise, along with excellent line and load transient response using a small 4.7 μF ceramic output capacitor.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Output Current | Up to 1 A |
| Output Voltage | Fixed: 4.2 V (other fixed and adjustable options available) |
| Dropout Voltage | 84 mV at 1 A load |
| Initial Accuracy | −0.5% (minimum), +1% (maximum) |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Quiescent Current | 0.7 mA with no load |
| Shutdown Current | 0.25 μA at VIN = 5 V |
| Load Transient Response | Typically 1.5 μs for a 1 mA to 500 mA load step |
| Package | 8-lead, 3 mm × 3 mm LFCSP with exposed pad |
Key Features
- High power supply rejection and low noise
- Excellent line and load transient response with a small 4.7 μF ceramic output capacitor
- Adjustable and fixed output voltage options (fixed 4.2 V in this model)
- Precision enable and soft start capabilities
- Low shutdown current and quiescent current
- 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-4.2-R7?
The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum output current of the ADM7171ACPZ-4.2-R7?
The maximum output current is up to 1 A.
- What is the output voltage of the ADM7171ACPZ-4.2-R7?
The output voltage is fixed at 4.2 V, but other fixed and adjustable options are available in different models.
- What is the dropout voltage of the ADM7171ACPZ-4.2-R7?
The dropout voltage is 84 mV at 1 A load.
- What is the quiescent current of the ADM7171ACPZ-4.2-R7?
The quiescent current is 0.7 mA with no load.
- What is the shutdown current of the ADM7171ACPZ-4.2-R7?
The shutdown current is 0.25 μA at VIN = 5 V.
- What is the load transient response time of the ADM7171ACPZ-4.2-R7?
The load transient response is typically 1.5 μs for a 1 mA to 500 mA load step.
- What package type is the ADM7171ACPZ-4.2-R7 available in?
The device is available in an 8-lead, 3 mm × 3 mm LFCSP package with an exposed pad.
- What are some typical applications of the ADM7171ACPZ-4.2-R7?
Typical applications include regulation for noise-sensitive circuits, communications, medical and healthcare, and industrial and instrumentation.
- Does the ADM7171ACPZ-4.2-R7 support adjustable output voltage?
While the ADM7171ACPZ-4.2-R7 is a fixed output voltage model, other models in the ADM7171 series offer adjustable output voltage options.
