TC1303A-ZS0EUNTR

Overview

The TC1303A-ZS0EUNTR is a dual-output power management IC from 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, with a nominal rating of 3.6 V. The device utilizes current-mode control and pulse width modulation (PWM), switching at a fixed frequency of 2.0 MHz under heavy loads. It incorporates automatic transition from PWM to PFM mode for improved light-load efficiency. The component is housed in a 10-pin MSOP package.

Feature Summary

• Dual-output architecture combining a high-efficiency synchronous buck converter with a dedicated LDO stage.
• Integrated power-good output signal providing system status indication with a defined delay period.
• Independent shutdown controls allow separate management of the buck and LDO outputs to minimize standby consumption.
• Internal compensation simplifies external component requirements while maintaining stable regulation across load variations.

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded systems needing simultaneous regulated voltages for logic and analog circuits

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm output voltage configurations and package variants. Ensure compatibility with RoHS standards and lead-free manufacturing processes required by your assembly line. Cross-reference the datasheet revision history to validate electrical characteristics and pin assignments before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require both high-current switching regulation and low-noise linear regulation from a single supply source. Consider the internal compensation and fixed switching frequency if minimizing external passive components is a priority. Evaluate the quiescent current specifications against battery life requirements for portable applications.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which integrates a synchronous buck converter and an LDO in a compact footprint. The series is designed for space-constrained applications where multiple voltage rails are necessary but board area is limited. It shares functional similarities with other members of the family, differentiated primarily by output voltage settings and package options.

Replacement Considerations

Direct substitutes include other TC1303A variants with different output voltage suffixes, such as TC1303A-BH0EUNTR or TC1303A-VS3EUNTR, provided the voltage configuration matches the design requirements. Verify pin-to-pin compatibility and thermal performance before substitution.