TC1303B-PF0EMFTR

Overview

The TC1303B-PF0EMFTR is a dual-output power management IC from Microchip Technology, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) regulator. It operates within an input voltage range of 2.7 V to 5.5 V, with a nominal rating of 3.6 V. The device utilizes current-mode control and pulse width modulation, supporting a maximum switching frequency of 2400 kHz. It incorporates automatic transition between PWM and PFM modes for optimized efficiency. The component is housed in a 10-pin DFN package measuring 3 mm x 3 mm with a height of 0.9 mm.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck converter with a dedicated LDO regulator
• Integrated power-good output signal providing system status indication with configurable delay
• Independent shutdown controls allowing separate management of the buck and LDO outputs
• Automatic mode transition mechanism that switches between PWM and PFM operation based on load conditions

Applications

• Portable electronic devices requiring efficient multi-rail power distribution
• Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded applications needing independent regulation for digital logic and analog peripherals
• Space-constrained designs benefiting from compact surface-mount packaging

Procurement Notes

Verify the specific suffix PF0EMFTR against official Microchip documentation to confirm the exact fixed output voltage configuration. Ensure the ordering part number matches the required pinout and thermal characteristics. Confirm compliance with RoHS standards and lead-free specifications as indicated in the manufacturer's datasheet before finalizing procurement.

Selection Notes

Select this component when a design requires both a high-efficiency step-down converter and a low-noise linear regulator within a single footprint. Consider the internal compensation and fixed switching frequency for simplified external component selection. Evaluate the quiescent current requirements and the necessity for independent output shutdown capabilities during the initial circuit architecture phase.

Part Context

This part belongs to the TC1303 family of dual-output regulators manufactured by Microchip Technology. The series integrates a synchronous buck controller and an LDO to provide versatile power solutions for portable electronics. The B variant typically denotes specific electrical characteristics or output configurations within the broader product line, sharing common features like the 10-lead DFN package and integrated protection mechanisms.

Replacement Considerations

Consult Microchip technical support for verified cross-reference part numbers. Ensure any substitute maintains compatibility with the 2.7 V to 5.5 V input range and offers equivalent current ratings for both the buck and LDO sections. Verify pin-to-pin compatibility and thermal performance if replacing in an existing layout.