TC1303B-VS0EUN

Overview

The TC1303B-VS0EUN 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, with a nominal rating of 3.6 V. The device utilizes current-mode control and pulse width modulation (PWM), switching at a maximum frequency of 2400 kHz. It incorporates automatic transition from PWM to pulse frequency modulation (PFM) modes for efficiency optimization. The component is housed in a 10-pin MSOP package.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck converter with a dedicated low-dropout linear regulator.
• 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.
• Internally compensated design simplifies external component selection while maintaining stability across operating conditions.

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 logic and analog supply rails

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm pin compatibility and thermal characteristics. Ensure the ordering part number matches the required package type and tape-and-reel specifications. Cross-reference regulatory compliance markings such as RoHS status directly with the manufacturer's datasheet before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require both high-efficiency step-down conversion and a clean, low-noise linear supply rail from a single input source. Consider the internal compensation and fixed switching frequency for simplified layout requirements. Evaluate the quiescent current specifications against battery life targets for portable applications.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like the TC1303A, TC1303C, and TC1304. These components share similar functional architectures but may differ in output voltage ranges, current capabilities, or package options. The family is designed for compact power solutions in space-constrained electronic designs.

Replacement Considerations

Direct substitutes include other members of the TC1303 series, such as TC1303A or TC1303C, provided their electrical parameters align with the design requirements. Verify pin-to-pin compatibility and output voltage configurations before substitution.