MC34280FTB

Power Management - Specialized Overview

The MC34280FTB is a power supply integrated circuit featuring two boost regulated outputs and supervisory functions. It utilizes Pulse-Frequency-Modulation (PFM) with an internal synchronous rectifier for high efficiency. The main step-up regulator output is externally adjustable from 2.7V to 5V, while the auxiliary regulator provides a wide range of positive voltage, digitally controllable via a 6-bit internal DAC or potentiometer.

Power Management - Specialized Feature Summary

• Integrates PFM control and synchronous rectification for enhanced conversion efficiency
• Provides digital voltage adjustment capability for the auxiliary output through an internal DAC
• Includes comprehensive protection mechanisms such as current limit and battery low detection

Power Management - Specialized Applications

• Digital Organizer and Dictionary
• Personal Digital Assistance (PDA)
• Handheld Battery Powered Devices using 1-2 AA/AAA cells

Power Management - Specialized Procurement Notes

Verify the specific suffix FTB against official onsemi documentation to confirm pinout compatibility and package specifications. Ensure the component matches the required 32-pin LQFP form factor. Cross-reference the datasheet revision date to validate feature availability and electrical characteristics before integration into design schematics.

Power Management - Specialized Selection Notes

Select this component for designs requiring dual boosted outputs from low input voltages. It is suitable for applications needing digitally adjustable auxiliary rails for LCD contrast or similar functions. Consider its standby quiescent current and programmable power-on reset delay when optimizing system power management strategies.

Power Management - Specialized Part Context

This part belongs to the onsemi power management IC portfolio, specifically designed for portable electronics. It addresses the need for efficient power conversion in battery-operated devices by combining multiple regulation stages and supervisory logic into a single compact integrated circuit solution.

Power Management - Specialized Replacement Considerations

Consult official substitution guides for verified alternatives. Generic replacements may lack the specific digital DAC control or synchronous rectification features.