TC1303B-SI0EMF

Overview

The TC1303B-SI0EMF is a dual-output power management IC from Microchip Technology, integrating a synchronous buck regulator and a low-dropout linear regulator. It operates within an input voltage range of 2.7V to 5.5V. The synchronous buck section provides up to 500mA output current with a fixed switching frequency of 2MHz, while the LDO delivers up to 300mA. The device features independent shutdown controls for each output and includes a power-good indicator with a 300ms delay. It is housed in a compact 10-DFN (3x3mm) package.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single package
• Features automatic transition between PWM and PFM modes to optimize efficiency across load conditions
• Includes independent shutdown pins for precise control of both buck and LDO outputs
• Provides system status monitoring via a power-good output signal with configurable delay

Applications

• Portable consumer electronics requiring multiple regulated voltage rails
• Battery-powered devices needing efficient step-down conversion and stable linear regulation
• Embedded systems utilizing microcontrollers or application processors
• IoT modules with strict space constraints and low quiescent current requirements

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm exact output voltages and packaging type. Ensure compatibility with the target PCB footprint, specifically the 10-DFN thermal pad requirements. Confirm RoHS compliance status if required by regional regulations. Check for direct replacement part numbers if supply chain constraints exist.

Selection Notes

Select this component when a combined solution for switching and linear regulation is preferred over discrete parts. Consider the 2MHz switching frequency for smaller external inductor sizes compared to lower-frequency alternatives. Evaluate the total quiescent current specifications against battery life requirements. Verify that the available output voltage options meet the specific rail requirements of the design.

Part Context

This component belongs to the TC1303 family of dual-output regulators. The 'B' variant typically denotes specific electrical characteristics or output configurations within the series. It is designed as a space-saving alternative to using separate buck and LDO regulators, offering integrated compensation and protection features common to Microchip's PMIC portfolio.

Replacement Considerations

TC1303B-SA0EMFTR is listed as a direct substitute.