ADP1821ARQZ-R7

Overview

The ADP1821ARQZ-R7 is a step-down DC-to-DC controller manufactured by Analog Devices Inc. It operates within an input voltage range of 3.7V to 5.5V and supports switching frequencies of 310kHz and 570kHz. The device features a maximum duty cycle of 90% and provides one output phase. It is housed in a 16-lead Shrink Small Outline Package (QSOP) with a thermal operating range from -40°C to +85°C.

Feature Summary

• Integrated high-side and low-side N-channel MOSFET drivers for efficient power conversion
• Fixed frequency operation selectable between 310kHz and 570kHz
• Built-in soft-start functionality to limit inrush current during startup

Applications

• Portable battery-powered equipment
• Industrial control systems
• Communication infrastructure

Procurement Notes

Verify the specific suffix R7 corresponds to the reel packaging configuration required for your assembly line. Confirm that the QSOP-16 package dimensions align with your PCB footprint specifications. Ensure the operating temperature range meets the environmental requirements of the final application.

Selection Notes

Select this component when a compact, single-phase buck solution is needed for low-voltage inputs. The fixed frequency options allow for optimization of external component size. Consider the thermal performance of the QSOP package relative to the expected load current and ambient conditions.

Part Context

This part belongs to the ADP1821 family of step-down controllers designed for applications requiring high efficiency in small form factors. It integrates driver circuitry to reduce external component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.