TC1303C-RD1EMF

Overview

The TC1303C-RD1EMF is a dual-output power management integrated circuit manufactured by Microchip Technology. It integrates a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator within a single package. The device operates with an input voltage range of 2.7 V to 5.5 V, featuring a nominal rating of 3.6 V. The synchronous buck section utilizes current-mode control with pulse width modulation at a fixed frequency of 2.4 MHz maximum. It supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed outputs. The component is housed in a 10-pin DFN-10 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 and a dedicated LDO regulator
• Automatic transition between PWM and PFM modes to optimize efficiency across varying load conditions
• Integrated power-good output signal indicating valid regulation status with a defined delay period
• Independent shutdown controls for the buck and LDO outputs to minimize quiescent current consumption

Applications

• Portable electronic devices requiring efficient multi-voltage rail generation
• Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded applications needing compact power solutions with independent output control
• Consumer electronics requiring low noise and high efficiency in small form factors

Procurement Notes

Verify the specific suffix RD1EMF against official Microchip documentation to confirm tape-and-reel packaging and lead finish specifications. Ensure compatibility with RoHS and REACH regulations as indicated by the e3 designation. Cross-reference the ordering code with the manufacturer's current product status to confirm availability and lifecycle stage before procurement.

Selection Notes

Select this component when a design requires both high-efficiency switching regulation and a clean LDO supply from a single input source. The internal compensation simplifies layout requirements compared to discrete solutions. Consider the 2.4 MHz switching frequency for balancing electromagnetic interference filtering needs against passive component size constraints.

Part Context

This part belongs to the TC1303 family of dual-output regulators. Variants such as TC1303A, B, and C differ primarily in output voltage options and thermal characteristics. The TC1303C specifically offers adjustable buck output ranges alongside fixed LDO options, providing flexibility for various logic and analog voltage requirements in modern portable designs.

Replacement Considerations

Direct substitutes include other TC1303C variants with matching pinouts and electrical characteristics, such as TC1303C-TR1EMFTR or TC1303C-FC1EMF. Verify that replacement parts maintain the same 500 mA buck and 300 mA LDO current ratings and compatible output voltage configurations.