MAX1844ETP

Overview

The MAX1844ETP is a high-speed step-down DC-DC controller IC designed for notebook computer power systems. It operates with an input voltage range of 2V to 5.5V and provides regulated output voltages including 1V, 1.8V, 2.5V, and up to 5.5V. The device utilizes current-mode PWM control architecture to achieve high efficiency and excellent transient response. It features accurate current limit protection and operates at a switching frequency of 600kHz. The component is housed in a 20-pin TQFN package with an exposed pad (TQFN-EP-20) for enhanced thermal performance.

Feature Summary

• High-speed step-down controller optimized for notebook power applications
• Current-mode PWM architecture ensuring stable regulation and fast transient response
• Integrated accurate current limit protection for system safety
• Wide input voltage compatibility supporting standard logic levels

Applications

• Notebook computer power management systems
• General-purpose step-down DC-DC conversion
• Portable electronic device power rails

Procurement Notes

Verify the specific suffix designation carefully, as the MAX1844 series includes variants such as MAX1844ETP+T. Confirm whether the required unit is the tube-packaged ETP version or the tape-and-reel ETP+T version. Check current availability status as this component may be subject to discontinuation or limited stock depending on the distributor. Ensure the package type matches the PCB footprint requirements.

Selection Notes

Select this component when designing power stages for portable computing devices requiring efficient buck conversion from 5V sources. The current-mode control is suitable for loads demanding rapid load transient handling. Consider the 600kHz switching frequency for balancing component size and efficiency. Verify that the required output voltage falls within the supported ranges of 1V, 1.8V, 2.5V, or 5.5V.

Part Context

The MAX1844 belongs to the Maxim Integrated MAX1844 series of high-speed step-down controllers. These devices are specifically engineered for mobile computing platforms where power efficiency and board space are critical constraints. The series leverages advanced CMOS technology to deliver robust performance in compact packages, serving as a core power management solution for processors and memory subsystems in laptops and tablets.

Replacement Considerations

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