TC1303A-RI1EMF

Overview

The TC1303A-RI1EMF is a dual-output power management IC manufactured by Microchip Technology, integrating 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 typical quiescent current of 65 µA. The device features a 2.0 MHz fixed-frequency PWM for the buck converter and includes a power-good output with a 300 ms delay. It utilizes a DFN-10 package measuring 3 x 3 mm.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single compact package
• Features automatic transition between PWM and PFM modes to optimize efficiency across load conditions
• Provides independent shutdown control for both the buck and LDO outputs
• Includes a power-good signal output with a specified 300 ms delay

Applications

• Portable battery-powered electronic devices requiring multiple regulated voltages
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries
• IoT modules and wireless communication equipment with strict power constraints
• Handheld instruments and medical devices needing efficient power conversion

Procurement Notes

Verify the specific suffix RI1EMF against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with RoHS standards and check for any specific handling requirements associated with the DFN-10 package during assembly.

Selection Notes

Select this component when a design requires both high-efficiency switching regulation and low-noise linear regulation from a single source. It is suitable for applications where board space is limited and independent control of power rails is necessary. Consider the 2.0 MHz switching frequency for passive component size optimization.

Part Context

This part belongs to the TC1303/TC1304 family of dual-output regulators designed for portable electronics. The TC1303 variant specifically offers independent shutdown capabilities for its buck and LDO sections, distinguishing it from models with coupled control. The family focuses on minimizing system power consumption while maintaining stable output voltages under varying load conditions.

Replacement Considerations

Direct substitutes include other variants within the TC1303 series such as TC1303A-QC1EMF or TC1303A-SG1EMF, provided their output voltage settings match the design requirements. Verify pin-to-pin compatibility and electrical specifications before substitution.