TC1303B-SE0EMFTR

Overview

The TC1303B-SE0EMFTR is a dual-output power management IC from Microchip Technology, featuring 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 utilizes a 2.0 MHz fixed-frequency PWM control scheme for the buck converter, transitioning automatically to pulse frequency modulation (PFM) at light loads to enhance efficiency. It includes a power-good output with a 300 ms delay and independent shutdown controls for both outputs. The component is housed in a 10-lead DFN package.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator with automatic mode transition for optimized performance across load conditions.
• Provides a dedicated low-dropout linear regulator output with independent shutdown capability for flexible power sequencing.
• Includes a delayed power-good signal to ensure stable system initialization and reliable status monitoring.

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices needing extended operational life through low quiescent current
• Embedded systems utilizing microcontrollers or sensors with distinct voltage requirements

Procurement Notes

Verify the specific suffix SE0EMFTR against the official Microchip datasheet to confirm the exact output voltage configuration and package variant. Ensure compatibility with your board's thermal design, as the DFN-10 package requires adequate copper pour for heat dissipation. Confirm that the required output voltages match the factory-set options available for this specific part number revision.

Selection Notes

Select this component when a compact solution combining switching and linear regulation is required. It is suitable for designs where space constraints favor the DFN-10 footprint. Consider the internal compensation which simplifies external component selection. Verify that the input voltage range aligns with your battery or supply source specifications.

Part Context

This part belongs to the TC1303 family, which offers various output voltage configurations and package options. The TC1303B specifically denotes the version with defined electrical characteristics and output settings. Other variants in the series may differ in fixed output voltages or pin assignments, necessitating careful cross-referencing during design implementation.

Replacement Considerations

Direct replacements include other TC1303B variants with different output voltage suffixes if the voltage requirement differs. Cross-family alternatives from other manufacturers require verification of pin compatibility and electrical parameters such as current capacity and switching frequency.

FAQ

What is the typical quiescent current of the TC1303B?

The total device quiescent current is typically 65 µA.

Does the buck regulator support adjustable output voltages?

Yes, the buck regulator supports adjustable output voltages ranging from 0.8 V to 4.5 V, as well as standard fixed-output options depending on the specific suffix.