TC1303B-SH0EMF

Overview

The TC1303B-SH0EMF 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 converter utilizes a fixed-frequency PWM control scheme at 2.0 MHz under heavy loads, transitioning automatically to PFM mode for improved light-load efficiency. The component is housed in a 10-pin DFN-10 package measuring 3 mm x 3 mm.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck converter with a dedicated LDO regulator
• Automatic transition between PWM and PFM modes to optimize efficiency across varying load conditions
• Integrated power-good output signal providing system status indication with a defined delay period
• Independent shutdown control pins allowing separate management of the buck and LDO outputs

Applications

• Portable consumer electronics requiring multiple regulated voltage rails from a single source
• Battery-powered devices utilizing the LDO for noise-sensitive analog circuits
• Embedded systems needing independent output control for power sequencing
• Compact industrial modules constrained by small form factor requirements

Procurement Notes

Verify the specific suffix SH0 against official Microchip documentation to confirm the exact output voltage configuration. Ensure the ordering part number matches the required package variant and temperature rating. Cross-reference the datasheet revision date to validate technical specifications before finalizing procurement orders.

Selection Notes

Select this component when a design requires both high-efficiency switching regulation and low-noise linear regulation in a minimal footprint. The internal compensation simplifies external component selection. Verify that the required output voltages align with the available fixed options or adjustable ranges specified in the electrical characteristics table.

Part Context

This part belongs to the TC1303 family of dual-output regulators. Variants within this series differ primarily in their fixed output voltage settings and package types. The TC1303B designation indicates specific electrical parameters distinct from the TC1303A or TC1303C counterparts.

Replacement Considerations

Consult official substitution lists for compatible parts with identical pinouts and electrical ratings. Verify that alternative components support the same 2.0 MHz switching frequency and current capabilities.