ADP3156JR-1.8

Special Purpose Regulators Overview

The ADP3156JR-1.8 is a synchronous step-down switching regulator manufactured by Analog Devices Inc., designed for efficient power conversion in compact electronic systems. This component operates with an input voltage range of 2.7 V to 5.5 V, providing a fixed output voltage of 1.8 V. It features a high switching frequency of 1.2 MHz, enabling the use of small external passive components. The device integrates a 0.4 A switch and offers protection against overcurrent and thermal overload. Packaged in a compact SOT-23-5 format, it supports surface-mount installation and functions within a temperature range of -40°C to +85°C, making it suitable for portable applications requiring stable low-voltage regulation.

Special Purpose Regulators Feature Summary

• Synchronous buck topology for enhanced efficiency
• Integrated 0.4 A power switch
• Fixed 1.8 V output voltage option
• Compact SOT-23-5 package design

Special Purpose Regulators Applications

• Portable consumer electronics
• Battery-powered devices
• Embedded system power supplies
• Low-voltage digital circuit regulation

Special Purpose Regulators Procurement Notes

Verify the specific suffix 'JR' corresponds to the required tape-and-reel packaging quantity and temperature grade when ordering. Confirm that the fixed 1.8 V output aligns with the target load requirements before procurement. Ensure compatibility with the intended PCB layout for the SOT-23-5 footprint. Cross-reference the manufacturer's latest datasheet to validate any updates to electrical characteristics or recommended operating conditions prior to finalizing supply chain agreements.

Special Purpose Regulators Selection Notes

Select this regulator when a fixed 1.8 V output is required from a single-cell lithium-ion or lithium-polymer battery source. The 1.2 MHz switching frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the 0.4 A current limit for loads exceeding this threshold, as alternative higher-current models would be necessary. Evaluate the thermal performance in the specific application enclosure, given the small package size. Verify that the input voltage remains within the 2.7 V to 5.5 V operational window under all expected conditions.

Special Purpose Regulators Part Context

The ADP3156 series belongs to Analog Devices' portfolio of synchronous step-down converters optimized for space-constrained applications. These regulators are part of the broader PMIC category, focusing on efficient voltage translation from battery sources to logic-level voltages. The ADP3156 specifically targets markets requiring simple, cost-effective solutions with minimal external component count. Its design philosophy emphasizes ease of implementation and reliable operation in portable devices where battery life and physical size are critical constraints.

Special Purpose Regulators Replacement Considerations

Consult official cross-reference tools for parametrically similar parts. Verify that substitutes match the 1.8 V output, 0.4 A current rating, and SOT-23-5 package. Check for equivalent switching frequencies and thermal protection features.