TC1303B-DG0EMFTR

Overview

The TC1303B-DG0EMFTR 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 typical quiescent current of 65 µA. The synchronous buck section supports a fixed switching frequency of 2.0 MHz and offers over 90% typical efficiency. It includes independent shutdown controls for both outputs and provides a power-good output signal with a 300 ms delay.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single package
• Features automatic transition from PWM to PFM mode for improved light-load efficiency
• Provides independent shutdown control for the buck and LDO outputs
• Includes a power-good indicator with a 300 ms delay for system monitoring

Applications

• Portable consumer electronics requiring compact power solutions
• Battery-powered devices needing efficient voltage regulation
• Embedded systems utilizing multiple voltage rails
• IoT modules with strict space and power constraints

Procurement Notes

Verify that the specific suffix DG0 corresponds to the required output voltage configuration or pinout variant before ordering. Confirm that the DFN-10 package dimensions align with the PCB footprint requirements. Ensure compatibility with the intended input voltage range and load conditions. Cross-reference the manufacturer's latest datasheet to validate any revisions or updates to the electrical characteristics.

Selection Notes

Select this component when a combined switching and linear regulation solution is required to save board space. The internal compensation simplifies design by reducing external component count. Consider the 2.0 MHz switching frequency for balancing EMI performance and passive component size. Verify that the total current demands of the application do not exceed the individual limits of the buck and LDO sections.

Part Context

This part belongs to the TC1303 family, which combines high-efficiency switching technology with the low noise of LDOs. The TC1303B variant specifically denotes the 500 mA buck and 300 mA LDO configuration. It is designed for applications where power density and efficiency are critical. The family supports various output voltage options and packaging styles to suit different form factors.

Replacement Considerations

Check for other suffixes in the TC1303B series, such as those indicating different fixed output voltages or package types. Ensure that any substitute maintains the same 10-pin DFN footprint and pinout compatibility. Verify that the alternative part meets the same input voltage and current specifications.