Overview
The ADM7171ACPZ-1.8-R7, produced by Analog Devices Inc., is a high-performance CMOS low dropout linear regulator (LDO) designed to operate from an input voltage range of 2.3 V to 6.5 V and provide up to 1 A of output current. This LDO is ideal for regulating high-performance analog and mixed signal circuits, particularly those requiring low noise, high power supply rejection ratio (PSRR), and fast transient response. The device features an advanced proprietary architecture that ensures excellent line and load transient response with a small 4.7 μF ceramic output capacitor.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Maximum Load Current | 1 A |
| Output Voltage Options | Fixed: 1.3 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 4.2 V, 5.0 V; Adjustable: 1.2 V to VIN - VDO |
| Noise | 5 μV rms (100 Hz to 100 kHz) |
| PSRR at 100 kHz | 60 dB |
| Dropout Voltage at 500 mA | 42 mV (VOUT = 3 V) |
| Initial Accuracy | −0.5% (min), +1% (max) |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Quiescent Current (IGND) with No Load | 0.7 mA |
| Shutdown Current | 0.25 μA at VIN = 5 V |
| Package Type | 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 independent of output voltage at 100 Hz to 100 kHz
- High PSRR: 60 dB at 100 kHz
- Low dropout voltage: 42 mV at 500 mA load, VOUT = 3 V
- Precision enable and adjustable soft start
- Stable with a small 4.7 μF ceramic output capacitor
- Support for ADIsimPower tool
Applications
The ADM7171ACPZ-1.8-R7 is suitable for various applications requiring high-performance voltage regulation, including:
- 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-1.8-R7? The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum load current of the ADM7171ACPZ-1.8-R7? The maximum load current is 1 A.
- What are the available output voltage options for the ADM7171ACPZ-1.8-R7? The device offers fixed output voltages of 1.3 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 4.2 V, and 5.0 V, as well as an adjustable option from 1.2 V to VIN - VDO.
- What is the noise level of the ADM7171ACPZ-1.8-R7? The noise level is 5 μV rms from 100 Hz to 100 kHz.
- What is the PSRR of the ADM7171ACPZ-1.8-R7 at 100 kHz? The PSRR is 60 dB at 100 kHz.
- How does the ADM7171ACPZ-1.8-R7 handle transient response? It has a fast transient response of 1.5 μs for a 1 mA to 500 mA load step.
- What is the typical quiescent current of the ADM7171ACPZ-1.8-R7 with no load? The quiescent current is 0.7 mA.
- What is the shutdown current of the ADM7171ACPZ-1.8-R7? The shutdown current is 0.25 μA at VIN = 5 V.
- What package type is the ADM7171ACPZ-1.8-R7 available in? It is available in an 8-lead, 3 mm × 3 mm LFCSP package.
- What tool supports the design of the ADM7171ACPZ-1.8-R7? The ADIsimPower tool supports the design of this device.
