Overview
The ADP7157ARDZ-02-R7 is an adjustable linear regulator produced by Analog Devices Inc. This device is part of the ADP7157 series, which operates from an input voltage range of 2.3 V to 5.5 V and provides up to 1.2 A of output current. The ADP7157 is designed to offer high power supply rejection ratio (PSRR) and ultralow noise, making it suitable for noise-sensitive applications. The regulator is available in compact packages, including 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC, ensuring excellent thermal performance and a small footprint.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V |
| Adjustable Output Voltage Range | 1.2 V to 3.3 V |
| Maximum Load Current | 1.2 A |
| Output Noise (100 Hz to 100 kHz) | 0.9 µV rms typical |
| Output Noise (10 Hz to 100 kHz) | 1.6 µV rms typical |
| Noise Spectral Density (10 kHz to 1 MHz) | 1.7 nV/√Hz |
| Power Supply Rejection Ratio (PSRR) at 1 kHz to 100 kHz | Up to 82 dB |
| Dropout Voltage at IOUT = 1.2 A, VOUT = 3.3 V | 120 mV typical |
| Initial Accuracy at ILOAD = 10 mA, TA = 25°C | ±0.6% |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Operating Supply Current (IGND) at 0 µA | 4.0 mA typical |
| Operating Supply Current (IGND) at 1.2 A | 7.0 mA typical |
| Shutdown Current | 0.2 µA typical |
| Output Capacitor Stability | Stable with a 10 µF ceramic output capacitor |
| Package Options | 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC |
Key Features
- High power supply rejection ratio (PSRR) up to 82 dB from 1 kHz to 100 kHz.
- Ultralow noise: 0.9 µV rms from 100 Hz to 100 kHz and 1.7 nV/√Hz from 10 kHz to 1 MHz.
- Adjustable output voltage range from 1.2 V to 3.3 V.
- Maximum load current of 1.2 A.
- Low dropout voltage of 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V.
- Precision enable feature.
- Compact packaging options: 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC.
- Supported by ADIsimPower tool for design and simulation.
Applications
- Noise-sensitive applications: phase-locked loops (PLLs), voltage-controlled oscillators (VCOs), and PLLs with integrated VCOs.
- Communications and infrastructure: backhaul and microwave links.
Q & A
- What is the input voltage range of the ADP7157ARDZ-02-R7?
The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum load current the ADP7157ARDZ-02-R7 can provide?
The maximum load current is 1.2 A.
- What are the typical output noise levels of the ADP7157ARDZ-02-R7?
The typical output noise levels are 0.9 µV rms from 100 Hz to 100 kHz and 1.6 µV rms from 10 Hz to 100 kHz.
- What is the power supply rejection ratio (PSRR) of the ADP7157ARDZ-02-R7?
The PSRR is up to 82 dB from 1 kHz to 100 kHz.
- What are the package options available for the ADP7157ARDZ-02-R7?
The device is available in 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages.
- What is the typical dropout voltage of the ADP7157ARDZ-02-R7?
The typical dropout voltage is 120 mV at IOUT = 1.2 A, VOUT = 3.3 V.
- Is the ADP7157ARDZ-02-R7 stable with a ceramic output capacitor?
Yes, it is stable with a 10 µF ceramic output capacitor.
- What are some typical applications of the ADP7157ARDZ-02-R7?
Typical applications include noise-sensitive circuits like PLLs, VCOs, and microwave links.
- Does the ADP7157ARDZ-02-R7 support any design and simulation tools?
Yes, it is supported by the ADIsimPower tool.
- What is the initial accuracy of the ADP7157ARDZ-02-R7 at ILOAD = 10 mA, TA = 25°C?
The initial accuracy is ±0.6%.
