MAX844ISA+

Overview

The MAX844ISA+ is a special-purpose voltage regulator IC manufactured by Analog Devices Inc./Maxim Integrated. It functions as a charge pump designed for cellular telephone transmitter applications. The device provides a single output of -2V from an input voltage range of 2.5V to 10V. It is housed in an 8-SOIC package with a width of 3.90mm. The component operates within a temperature range of -25°C to +85°C and has a power dissipation rating of 471 mW.

Feature Summary

• Integrated charge pump architecture for generating negative voltage rails
• Designed specifically for cellular telephone transmitter biasing
• Wide input voltage tolerance supporting various supply conditions

Applications

• Cellular telephone transmitter circuits
• Bias voltage generation for RF stages
• Negative rail supply for analog components in mobile devices

Procurement Notes

Verify the current lifecycle status before procurement, as this part may be subject to end-of-life restrictions or last-time-buy notices. Confirm that the 8-SOIC package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your specific environmental constraints. Cross-reference the datasheet for any recent product change notifications or pinout updates.

Selection Notes

Select this component when a dedicated negative voltage generator is required for cellular transmitter architectures. It is suitable for designs needing a stable -2V rail derived from positive supplies between 2.5V and 10V. Consider the thermal performance given the 471 mW dissipation limit. Evaluate if the fixed output voltage meets system requirements without additional regulation.

Part Context

This component belongs to the Maxim Integrated family of special-purpose regulators. It is distinct from general-purpose linear or switching regulators due to its specific charge pump topology. The device is categorized under PMIC solutions tailored for telecommunications infrastructure and mobile handsets.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative charge pump ICs based on electrical specifications and pinout compatibility.