ADP7158ACPZ-1.8-R7

Overview

The ADP7158ACPZ-1.8-R7 is a linear regulator from Analog Devices operating within an input voltage range of 2.3 V to 5.5 V, delivering up to 2 A of load current. It provides a fixed output voltage of 1.8 V with an initial accuracy of ±0.6% at 10 mA and ±1.5% across line, load, and temperature variations. The device features ultralow noise characteristics, including 0.9 µV rms integrated noise from 100 Hz to 100 kHz and a spectral density of 1.7 nV/√Hz from 10 kHz to 1 MHz. Power supply rejection ratio (PSRR) reaches 70 dB from 1 kHz to 100 kHz and 50 dB at 1 MHz. Dropout voltage is typically 200 mV at 2 A for a 3.3 V output. Quiescent current is 4.0 mA at no load and 9.0 mA at full load, with a shutdown current of 0.2 µA. It is stable with a 10 µF ceramic output capacitor and housed in a 10-lead, 3 mm × 3 mm LFCSP package.

Feature Summary

• Ultralow noise architecture achieving excellent line and load transient response using only a 10 µF ceramic output capacitor.
• High power supply rejection ratio (PSRR) optimized for radio frequency applications.
• Precision enable pin with programmable thresholds and internal discharge resistors for rapid startup control.
• Integrated thermal protection and current limiting to safeguard against excessive power dissipation.

Applications

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

Procurement Notes

Verify the specific ordering suffix R7 indicates reel packaging when sourcing components. Confirm that the ACPZ designation corresponds to the 10-lead LFCSP package variant required for your design. Ensure compatibility with the specified 1.8 V fixed output voltage before procurement. Cross-reference the manufacturer part number with official distributor catalogs to validate authenticity and revision status.

Selection Notes

Select this component for designs requiring high current delivery with minimal noise interference. Verify that the input voltage remains within the 2.3 V to 5.5 V operational range under all conditions. Ensure the PCB layout supports the thermal requirements of the LFCSP package for sustained 2 A loads. Consider the minimum 10 µF ceramic output capacitance requirement for stability.

Part Context

The ADP7158 belongs to a family of RF linear regulators designed for noise-sensitive applications. It shares architectural similarities with the ADP7157 and ADP7159 but offers higher current capability. The device is supported by the ADIsimPower design tool for schematic generation and performance optimization. It targets infrastructure and communications systems where signal integrity is critical.

Replacement Considerations

The ADP7157 serves as a lower current alternative within the same series. The ADM7150 and ADM7151 are compatible options for higher input voltage ranges up to 16 V. The ADP7159 offers adjustable output voltage configurations similar to the fixed variants.