The ADP7157ARDZ-04-R7 is an ultralow-noise, high power supply rejection ratio (PSRR) linear voltage regulator manufactured by Analog Devices (ADI). Designed for noise-sensitive power management applications, this adjustable low-dropout (LDO) regulator delivers up to 1.2A of output current while providing excellent output noise performance and line and load transient response.
The device operates from an input voltage range of 2.3V to 5.5V and supports adjustable output voltages from 1.2V to 3.3V. Its ultralow output noise is typically 0.9μVrms over a frequency range of 100Hz to 100kHz, making it suitable for powering sensitive analog circuits, RF components, phase-locked loops (PLLs), and voltage-controlled oscillators (VCOs).
The ADP7157-04 model offers a typical PSRR of 82dB from 1kHz to 100kHz and 55dB at 1MHz under specified operating conditions. This high power supply noise rejection helps maintain a clean and stable output voltage in systems where supply noise can affect signal integrity and circuit performance.
With a typical dropout voltage of 120mV at a 1.2A load and 3.3V output, the regulator supports efficient low-voltage power conversion. Its initial output accuracy is ±0.6% at a 10mA load and 25°C, while output accuracy across line, load, and temperature is specified at ±1.5%.
The device integrates a precision enable function, current limiting, and thermal shutdown protection to support reliable operation. It is stable with a 10μF ceramic output capacitor, helping simplify external component selection and power supply design.
Housed in an 8-lead SOIC package with an exposed thermal pad, the ADP7157ARDZ-04-R7 combines compact dimensions with effective thermal management. Its operating temperature range of -40°C to +125°C makes it suitable for a variety of industrial, communication, RF, and precision analog applications.
Key Features:
- Manufacturer: Analog Devices (ADI)
- Part Number: ADP7157ARDZ-04-R7
- Product Type: Ultralow-Noise Adjustable LDO Regulator
- Input Voltage Range: 2.3V to 5.5V
- Adjustable Output Voltage: 1.2V to 3.3V
- Maximum Output Current: 1.2A
- Typical Output Noise: 0.9μVrms from 100Hz to 100kHz
- Typical PSRR: 82dB from 1kHz to 100kHz under specified -04 test conditions
- PSRR at 1MHz: 55dB under specified test conditions
- Typical Dropout Voltage: 120mV at 1.2A and 3.3V output
- Initial Output Accuracy: ±0.6% at 10mA and 25°C
- Output Accuracy Across Line, Load, and Temperature: ±1.5%
- Typical Shutdown Current: 0.2μA
- Control Feature: Precision Enable
- Protection Features: Current Limiting and Thermal Shutdown
- Recommended Output Capacitor: 10μF Ceramic
- Operating Temperature: -40°C to +125°C
- Package: 8-Lead SOIC with Exposed Pad (SOIC-EP)
- Mounting Type: Surface Mount (SMD/SMT)
- Packaging: Tape and Reel
- Product Status: Recommended for New Designs
Typical Applications:
- Low-noise RF power supplies
- Phase-locked loops (PLLs)
- Voltage-controlled oscillators (VCOs)
- Wireless communication equipment
- Microwave and backhaul communication systems
- Precision analog circuits
- Noise-sensitive signal chains
- High-performance power management systems
- Industrial electronic equipment
The Analog Devices ADP7157ARDZ-04-R7 combines ultralow output noise, high PSRR, adjustable voltage regulation, and 1.2A output capability in a compact SOIC package. It is a practical solution for engineers and electronic manufacturers who require clean, stable power for RF circuits, communication systems, and precision analog components.
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