ADP7157ARDZ-01-R7

Overview

The ADP7157ARDZ-01-R7 is an adjustable linear regulator from Analog Devices, operating within a 2.3 V to 5.5 V input range and delivering up to 1.2 A of output current. It features ultralow noise characteristics, with typical output noise of 0.9 µV rms (100 Hz to 100 kHz) and 1.6 µV rms (10 Hz to 100 kHz). The device provides high power supply rejection ratio (PSRR), achieving 70 dB from 1 kHz to 100 kHz and 52 dB at 1 MHz for the -01 model. It supports output voltages from 1.2 V to 1.8 V, maintains a dropout voltage of 120 mV typical at full load, and includes precision enable functionality with low shutdown current.

Feature Summary

• Ultralow noise performance optimized for sensitive RF applications
• High power supply rejection ratio across wide frequency ranges
• Precision enable pin with ultra-low shutdown current consumption
• Stable operation with small ceramic output capacitors

Applications

• Phase-locked loops (PLLs)
• Voltage controlled oscillators (VCOs)
• Communications infrastructure systems
• Backhaul and microwave links

Procurement Notes

Verify the specific -01 suffix designation ensures compatibility with required output voltage ranges between 1.2 V and 1.8 V. Confirm package availability matches design constraints, as this component utilizes surface-mount packaging options. Cross-reference thermal requirements against application board layout specifications to ensure adequate heat dissipation during continuous operation under maximum load conditions.

Selection Notes

Select this variant when designing circuits requiring precise regulation within lower voltage boundaries compared to other models in the series. Evaluate thermal management strategies carefully due to potential power dissipation at higher input-to-output differentials. Ensure external resistor divider values adhere to specified limits to maintain accuracy and minimize reference loading effects during normal operation.

Part Context

This component belongs to the ADP7157 family of high PSRR RF linear regulators designed by Analog Devices. The family offers multiple fixed and adjustable output configurations tailored for various input and output voltage combinations. These regulators utilize advanced proprietary architecture to deliver excellent transient response while maintaining compact footprints suitable for space-constrained electronic designs.

Replacement Considerations

Consider the ADP7156 or ADP7158 for alternative current ratings or fixed output options within the same family. Verify pinout compatibility and thermal characteristics before substituting with similar LDO regulators from other manufacturers.