IR3853MTRPBF

Voltage Regulators - DC DC Switching Regulators Overview

The IR3853MTRPBF is a synchronous buck switching regulator IC from Infineon Technologies, part of the SupIRBuck series. It operates with an input voltage range of 1.5V to 21V and provides an adjustable output voltage between 0.7V and 18.9V. The device delivers a continuous output current of 4A with a fixed switching frequency range of 225kHz to 1.65MHz. Housed in a compact 17-PowerVQFN package (4x5mm), it supports surface mount installation and functions within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side power MOSFETs for efficient synchronous rectification
• Utilizes constant on-time control architecture for fast transient response
• Includes internal bootstrap circuitry to simplify external component requirements

Voltage Regulators - DC DC Switching Regulators Applications

• Data processing systems
• Industrial equipment power distribution
• Telecommunications infrastructure

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific ordering suffix and tape-and-reel quantity against the manufacturer's latest documentation before finalizing orders. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check for any product discontinuation notices or lifecycle changes directly from Infineon to ensure long-term supply availability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a single-phase, high-efficiency step-down solution is required for moderate current loads up to 4A. Ensure the application input voltage remains within the specified 1.5V to 21V window. Consider the thermal performance of the 17-PowerVQFN package relative to the expected ambient conditions and PCB copper area for adequate heat dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SupIRBuck family of fully integrated DC-DC converters designed for space-constrained applications. It replaces discrete MOSFET designs by combining control logic and power stages into a single small-footprint package. The series targets applications demanding high power density and simplified board layout compared to traditional controller-based solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The source material indicates this product is obsolete. Verify official replacement part numbers through Infineon's product transition notifications or authorized distributor databases before proceeding with design-in.