Overview
The ADP7157ARDZ-01-R7 is an adjustable linear regulator produced by Analog Devices Inc. This device operates within an input voltage range of 2.3 V to 5.5 V and can provide up to 1.2 A of output current. It is designed with an advanced proprietary architecture that ensures high power supply rejection ratio (PSRR) and ultralow noise, making it suitable for noise-sensitive applications. The regulator is available in compact 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages, offering excellent thermal performance and a small footprint.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| 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 (rms) | 0.9 μV from 100 Hz to 100 kHz 1.7 nV/√Hz from 10 kHz to 1 MHz | |
| Power Supply Rejection Ratio (PSRR) | 82 dB from 1 kHz to 100 kHz 55 dB at 1 MHz | |
| 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% | |
| 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 | |
| Output Capacitor | Stable with a 10 μF ceramic output capacitor |
Key Features
- Adjustable output voltage range from 1.2 V to 3.3 V
- Ultralow noise: 0.9 μV rms from 100 Hz to 100 kHz and 1.7 nV/√Hz from 10 kHz to 1 MHz
- High PSRR: up to 82 dB from 1 kHz to 100 kHz and 55 dB at 1 MHz
- Low dropout voltage: 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V
- Precision enable
- Compact packages: 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC
- Supported by ADIsimPower tool
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-01-R7?
The input voltage range is from 2.3 V to 5.5 V. - What is the maximum load current the ADP7157ARDZ-01-R7 can provide?
The maximum load current is 1.2 A. - What are the typical output noise levels of the ADP7157ARDZ-01-R7?
The typical output noise is 0.9 μV rms from 100 Hz to 100 kHz and 1.7 nV/√Hz from 10 kHz to 1 MHz. - What is the power supply rejection ratio (PSRR) of the ADP7157ARDZ-01-R7?
The PSRR is up to 82 dB from 1 kHz to 100 kHz and 55 dB at 1 MHz. - What is the dropout voltage of the ADP7157ARDZ-01-R7?
The dropout voltage is 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V. - What is the initial accuracy of the ADP7157ARDZ-01-R7?
The initial accuracy is ±0.6% at ILOAD = 10 mA, TA = 25°C. - What type of output capacitor is recommended for the ADP7157ARDZ-01-R7?
The device is stable with a 10 μF ceramic output capacitor. - What are the typical operating supply currents of the ADP7157ARDZ-01-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 ADP7157ARDZ-01-R7?
The shutdown current is 0.2 μA typical. - In what packages is the ADP7157ARDZ-01-R7 available?
The device is available in 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages.
