TC1303C-ZI0EUNTR

Overview

The TC1303C-ZI0EUNTR is a dual-output power management IC manufactured by Microchip Technology, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) regulator. It operates within an input voltage range of 2.7 V to 5.5 V and utilizes a 10-pin MSOP package. The device integrates a Power-Good monitor with a 300 ms delay and supports independent shutdown for both outputs. It employs current-mode control with pulse width modulation, offering automatic transition from PWM to PFM modes for optimized efficiency across varying load conditions.

Feature Summary

• Integrates a 500 mA synchronous buck converter and a 300 mA LDO in a single compact package
• Includes a Power-Good output signal with a configurable 300 ms delay for system monitoring
• Supports independent shutdown control for the buck and LDO outputs to manage power states
• Features automatic transition between PWM and PFM modes to maintain high efficiency at light loads

Applications

• Cellular phones and mobile communication devices
• Portable computers and laptops
• USB-powered peripheral devices
• Handheld instruments and measurement tools

Procurement Notes

Verify the specific suffix 'ZI0' against official Microchip documentation to confirm the exact fixed output voltage configuration, as this variant determines the regulated DC level. Ensure the order quantity aligns with manufacturer reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement to ensure compatibility with assembly processes.

Selection Notes

Select this component when a design requires two distinct regulated rails from a single source, such as a primary logic supply and a secondary analog or I/O supply. The integrated Power-Good feature simplifies sequencing requirements compared to using separate regulators. Consider the thermal performance of the MSOP-10 package relative to the expected ambient temperature and load current to ensure reliable operation without external heatsinking.

Part Context

This part belongs to the TC1303 family, which combines switching and linear regulation technologies. The 'C' designation typically indicates specific electrical characteristics or revisions within the series. The ZI0 suffix identifies the specific output voltage setting for this instance. This integration reduces board space and component count compared to discrete solutions, targeting applications where size and power efficiency are critical constraints.

Replacement Considerations

Direct replacements include other variants within the TC1303 family, such as TC1303A, TC1303B, or TC1304, provided the output voltage and package type match the design requirements. Verify that any substitute maintains the same pinout and functional capabilities, particularly the independent shutdown and Power-Good features.