Overview
The ADP7157ARDZ-04-R7 is an adjustable linear regulator produced by Analog Devices Inc. This regulator operates from an input voltage range of 2.3 V to 5.5 V and provides an adjustable output voltage range from 1.2 V to 3.3 V. It is capable of delivering up to 1.2 A of output current, making it suitable for a variety of applications requiring high current and low noise.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V |
| 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 | 82 dB |
| Dropout Voltage at IOUT = 1.2 A, VOUT = 3.3 V | 120 mV typical |
| Initial Accuracy at ILOAD = 10 mA | ±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 Requirement | 10 µF ceramic |
| Package Types | 10-lead LFCSP, 8-lead SOIC |
Key Features
- High power supply rejection ratio (PSRR) of 82 dB from 1 kHz to 100 kHz and 55 dB at 1 MHz.
- Ultralow noise with 0.9 µV rms typical output noise from 100 Hz to 100 kHz.
- 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.
- Stable operation with a 10 µF ceramic output capacitor.
- Compact packaging options including 10-lead LFCSP and 8-lead SOIC.
Applications
The ADP7157ARDZ-04-R7 is particularly suited for noise-sensitive applications such as:
- Phase-locked loops (PLLs) and voltage-controlled oscillators (VCOs).
- Communications and infrastructure, including backhaul and microwave links.
Q & A
- What is the input voltage range of the ADP7157ARDZ-04-R7? The input voltage range is from 2.3 V to 5.5 V.
- What is the adjustable output voltage range of the ADP7157ARDZ-04-R7? The output voltage range is from 1.2 V to 3.3 V.
- What is the maximum load current the ADP7157ARDZ-04-R7 can provide? The maximum load current is 1.2 A.
- What is the typical output noise of the ADP7157ARDZ-04-R7 from 100 Hz to 100 kHz? The typical output noise is 0.9 µV rms.
- What is the power supply rejection ratio (PSRR) of the ADP7157ARDZ-04-R7 from 1 kHz to 100 kHz? The PSRR is 82 dB.
- What type of output capacitor is required for stable operation? A 10 µF ceramic output capacitor is required.
- In what packages is the ADP7157ARDZ-04-R7 available? It is available in 10-lead LFCSP and 8-lead SOIC packages.
- What is the typical dropout voltage at IOUT = 1.2 A and VOUT = 3.3 V? The typical dropout voltage is 120 mV.
- What is the precision enable feature of the ADP7157ARDZ-04-R7? The precision enable feature allows for precise control over the regulator's operation.
- What are some typical applications of the ADP7157ARDZ-04-R7? Typical applications include noise-sensitive circuits such as PLLs, VCOs, and communications infrastructure.
