TC1303B-VS0EMFTR

Overview

The TC1303B-VS0EMFTR 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 DFN-10 package measuring 3 x 3 mm with a height of 0.9 mm. The device operates from an input voltage range of 2.7 V to 5.5 V, with a typical nominal input of 3.6 V. The synchronous buck converter utilizes current-mode pulse width modulation at a fixed frequency of 2.0 MHz under heavy loads and features automatic transition to pulse frequency modulation for improved light-load efficiency. The total quiescent current is typically 65 µA. Both outputs are internally compensated, and the LDO 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 compact footprint
• Features automatic transition between PWM and PFM modes for optimized efficiency across load ranges
• Includes independent shutdown controls for both the buck and LDO outputs
• Provides a power-good status signal with a defined delay time

Applications

• Portable battery-powered consumer electronics requiring multiple voltage rails
• Embedded systems utilizing microcontrollers or application processors
• Industrial control modules operating on single-cell lithium-ion batteries
• IoT sensor nodes and wireless communication devices

Procurement Notes

Verify that the specific suffix 'VS0' corresponds to the required fixed output voltage configuration as defined in the official datasheet, since ordering suffixes determine electrical parameters. Confirm the tape-and-reel packaging format matches the intended automated assembly process. Ensure compliance with RoHS standards and lead-free specifications required by the target market regulations.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single source within a limited board area. The internal compensation simplifies the external component count compared to discrete solutions. Consider the thermal performance of the DFN-10 package relative to the expected ambient temperature and load current to ensure reliable operation without excessive junction temperatures.

Part Context

This part belongs to the TC1303 family, which combines switching and linear regulation technologies. The 'B' designation indicates specific electrical characteristics or revisions within the series. It serves as a solution for space-constrained applications where high efficiency from the buck stage and low noise from the LDO stage are both necessary. The family supports various output voltage configurations through different ordering suffixes.

Replacement Considerations

Direct replacements include other variants within the TC1303 family such as TC1303A or TC1303C, provided the output voltage settings match the system requirements. Cross-model substitutes from other manufacturers require verification of pin compatibility, thermal resistance, and electrical performance curves.