Overview
The ADP7157ACPZ-04-R7 is a high-performance, adjustable linear regulator produced by Analog Devices Inc. This device operates from an input voltage range of 2.3 V to 5.5 V and provides up to 1.2 A of output current. It is designed to offer high power supply rejection ratio (PSRR) and ultralow noise, making it suitable for noise-sensitive applications such as phase-locked loops (PLLs), voltage-controlled oscillators (VCOs), and communications infrastructure.
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 Output Current | 1.2 A |
| Dropout Voltage | 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V |
| Initial Accuracy | ±0.6% at ILOAD = 10 mA, TA = 25°C |
| Accuracy over Line, Load, and Temperature | ±1.5% |
| Power Supply Rejection Ratio (PSRR) | 82 dB from 1 kHz to 100 kHz, 55 dB at 1 MHz |
| Noise Spectral Density | 1.7 nV/√Hz from 10 kHz to 1 MHz |
| Operating Supply Current (IGND) | 4.0 mA typical at 0 µA, 7.0 mA typical at 1.2 A |
| Shutdown Current | 0.2 μA typical |
| Package | 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC |
| Operating Temperature Range | -40°C to +125°C |
Key Features
- High power supply rejection ratio (PSRR) of up to 82 dB from 1 kHz to 100 kHz and 55 dB at 1 MHz.
- Ultralow noise with a noise spectral density of 1.7 nV/√Hz from 10 kHz to 1 MHz.
- Adjustable output voltage range from 1.2 V to 3.3 V.
- Low dropout voltage of 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V.
- High accuracy with ±0.6% initial accuracy and ±1.5% accuracy over line, load, and temperature.
- Low shutdown current of 0.2 μA typical.
- Compact packaging in 10-lead LFCSP and 8-lead SOIC, enhancing thermal performance.
- Stable operation with a 10 µF ceramic output capacitor.
Applications
- Noise-sensitive applications: phase-locked loops (PLLs), voltage-controlled oscillators (VCOs), and PLLs with integrated VCOs.
- Communications and infrastructure: backhaul and microwave links.
- Other applications requiring high PSRR and low noise voltage regulation.
Q & A
- What is the input voltage range of the ADP7157ACPZ-04-R7?
The input voltage range is from 2.3 V to 5.5 V.
- What is the maximum output current of the ADP7157ACPZ-04-R7?
The maximum output current is 1.2 A.
- What is the typical dropout voltage of the ADP7157ACPZ-04-R7?
The typical dropout voltage is 120 mV at IOUT = 1.2 A, VOUT = 3.3 V.
- What is the power supply rejection ratio (PSRR) of the ADP7157ACPZ-04-R7?
The PSRR is up to 82 dB from 1 kHz to 100 kHz and 55 dB at 1 MHz.
- What is the noise spectral density of the ADP7157ACPZ-04-R7?
The noise spectral density is 1.7 nV/√Hz from 10 kHz to 1 MHz.
- What are the typical operating supply currents of the ADP7157ACPZ-04-R7?
The typical operating supply currents are 4.0 mA at 0 µA and 7.0 mA at 1.2 A.
- What is the shutdown current of the ADP7157ACPZ-04-R7?
The shutdown current is 0.2 μA typical.
- In what packages is the ADP7157ACPZ-04-R7 available?
The device is available in 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages.
- What is the operating temperature range of the ADP7157ACPZ-04-R7?
The operating temperature range is -40°C to +125°C.
- What type of capacitor is recommended for output stability?
A 10 µF ceramic output capacitor is recommended for stable operation.
