TC1303B-ZA0EMFTR

Overview

The TC1303B-ZA0EMFTR is a dual-output power management IC from Microchip Technology, integrating 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. The device features a typical total quiescent current of 65 µA and includes a Power-Good output with a 300 ms delay. The synchronous buck converter supports adjustable outputs from 0.8 V to 4.5 V or standard fixed voltages, utilizing a 2.0 MHz fixed-frequency PWM at heavy loads with automatic transition to PFM mode for efficiency.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single package
• Provides independent shutdown control for both the buck and LDO outputs
• Features a Power-Good signal indicating valid output regulation with a 300 ms delay
• Includes internal compensation for both regulators to simplify external component requirements

Applications

• Portable battery-powered consumer electronics requiring multiple voltage rails
• Embedded systems needing efficient step-down conversion alongside stable analog supply
• Industrial control modules operating from single-cell lithium-ion sources

Procurement Notes

Verify the specific suffix ZA0EMFTR against official Microchip documentation to confirm the exact output voltage configuration and packaging details. Ensure compatibility with RoHS standards and check for any recent product change notices that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a compact solution is required for generating two distinct regulated voltages from a single input source. It is suitable for designs prioritizing high efficiency under load due to the synchronous buck topology, while maintaining low noise performance for sensitive analog circuits via the integrated LDO.

Part Context

This part belongs to the TC1303 family of dual-output regulators manufactured by Microchip Technology. The series is designed to replace discrete regulator solutions, offering space savings and simplified board layout. The TC1303B variant specifically denotes the version with defined output voltage options and thermal characteristics as per the manufacturer's datasheet.

Replacement Considerations

Direct replacements include other variants within the TC1303 family such as TC1303A or TC1303C, provided the output voltage settings match the design requirements. Cross-referencing with TC1304 models may be necessary if different current ratings are acceptable.