TC1303A-UA0EMF

Overview

The TC1303A-UA0EMF is a dual-output power management IC manufactured by Microchip Technology, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator. It operates within an input voltage range of 2.7 V to 5.5 V and utilizes a 10-pin DFN-10 package measuring 3 mm x 3 mm with a height of 0.9 mm. The device incorporates current-mode control with pulse width modulation, supporting both adjustable output voltages from 0.8 V to 4.5 V and standard fixed configurations. It includes independent shutdown controls for each output and provides a power-good signal with a 300 ms delay.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a low-noise LDO in a single compact package
• Features automatic transition between PWM and PFM modes to optimize efficiency across varying load conditions
• Provides independent shutdown capabilities for the buck and LDO outputs to manage system power states
• Includes a power-good monitoring function with a defined delay to ensure stable startup sequencing

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded systems needing isolated regulation for digital logic and analog peripherals
• Industrial control modules operating on variable DC supply inputs

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with RoHS and REACH standards if required by your manufacturing process. Cross-reference the ordering part number with the manufacturer's latest datasheet to validate pinout assignments and thermal characteristics before finalizing procurement specifications.

Selection Notes

Select this component when space-constrained designs require both switching regulation efficiency and low-noise linear regulation. It is suitable for applications demanding independent control over multiple power rails from a single input source. Consider the internal compensation and fixed-frequency operation for simplified external component selection and stable loop performance without complex feedback network calculations.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for portable applications. It shares architectural similarities with the TC1303B and TC1303C series but differs in specific output voltage options and package markings. The family emphasizes high integration and low quiescent current to extend battery life in mobile and handheld electronic devices.

Replacement Considerations

Direct substitutes include other TC1303A variants with different output voltage suffixes, such as TC1303A-NH0EMFTR or TC1303A-ZH0EMFTR, provided the electrical parameters match the design requirements. Verify pin-to-pin compatibility and thermal performance when replacing with similar parts from other manufacturers.