Overview
The ADM7171ACPZ-1.3-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 ratio (PSRR), 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 | 1.3 V (fixed), adjustable options available |
| Noise (rms) at 100 Hz to 100 kHz | 5 μV |
| Load Transient Response | 1.5 μs for 1 mA to 500 mA load step |
| PSRR at 100 kHz | 60 dB |
| Dropout Voltage at 500 mA load | 42 mV (VOUT = 3 V) |
| Initial Accuracy | −0.5% (minimum), +1% (maximum) |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Quiescent Current (IGND) with no load | 0.7 mA |
| Shutdown Current at VIN = 5 V | 0.25 μA |
| Output Capacitor | 4.7 μF ceramic |
| Package | 8-lead, 3 mm × 3 mm LFCSP |
Key Features
- High output current up to 1 A
- Low dropout voltage of 42 mV at 500 mA load
- Low noise of 5 μV rms independent of output voltage at 100 Hz to 100 kHz
- Fast transient response of 1.5 μs for 1 mA to 500 mA load step
- High PSRR of 60 dB at 100 kHz
- Adjustable and fixed output voltage options (1.2 V to 5.0 V)
- Precision enable and soft start capabilities
- Stable operation with a small 4.7 μF ceramic output capacitor
- Available in 8-lead, 3 mm × 3 mm LFCSP package
Applications
- Regulation for noise-sensitive applications: ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICs
- Communications and infrastructure
- Medical and healthcare devices
- Industrial and instrumentation applications
Q & A
- What is the input voltage range of the ADM7171ACPZ-1.3-R7?
The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum load current of the ADM7171ACPZ-1.3-R7?
The maximum load current is 1 A.
- What is the output voltage of the ADM7171ACPZ-1.3-R7?
The output voltage for this specific model is fixed at 1.3 V, but adjustable options are also available.
- What is the noise level of the ADM7171ACPZ-1.3-R7?
The noise level is 5 μV rms independent of output voltage at 100 Hz to 100 kHz.
- How fast is the load transient response of the ADM7171ACPZ-1.3-R7?
The load transient response is typically 1.5 μs for a 1 mA to 500 mA load step.
- What is the PSRR of the ADM7171ACPZ-1.3-R7 at 100 kHz?
The PSRR is 60 dB at 100 kHz.
- What is the dropout voltage of the ADM7171ACPZ-1.3-R7 at 500 mA load?
The dropout voltage is 42 mV at 500 mA load (VOUT = 3 V).
- What is the quiescent current of the ADM7171ACPZ-1.3-R7 with no load?
The quiescent current (IGND) with no load is 0.7 mA.
- What is the shutdown current of the ADM7171ACPZ-1.3-R7 at VIN = 5 V?
The shutdown current is 0.25 μA at VIN = 5 V.
- In which package is the ADM7171ACPZ-1.3-R7 available?
The device is available in an 8-lead, 3 mm × 3 mm LFCSP package.
