TC1303B-VS0EMF

Overview

The TC1303B-VS0EMF 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 from 2.7 V to 5.5 V, featuring a nominal rating of 3.6 V. The synchronous buck section supports a maximum switching frequency of 2400 kHz and utilizes current-mode pulse width modulation control. The component is housed in a 10-pin DFN package measuring 3 mm by 3 mm with a height of 0.9 mm.

Feature Summary

• Dual-output architecture combining a high-efficiency synchronous buck converter with a dedicated LDO for simultaneous power rail generation.
• Automatic transition between Pulse Width Modulation and Pulse Frequency Modulation modes to optimize efficiency across varying load conditions.
• Integrated power-good output signal providing system status indication with a defined delay period for reliable startup sequencing.
• Independent shutdown controls allow separate management of the buck and LDO outputs to minimize quiescent current consumption.

Applications

• Portable consumer electronics requiring multiple regulated voltage rails from a single source
• Battery-powered devices utilizing lithium-ion or lithium-polymer cells
• Embedded systems needing efficient step-down conversion with low noise requirements
• Industrial control modules operating within standard low-voltage logic ranges

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure that the ordering information matches the required fixed voltage settings or adjustable range specifications. Cross-reference the manufacturer part number to avoid confusion with similar family members that may have different pinouts or electrical characteristics.

Selection Notes

Select this component when a design requires both a high-current switching regulator and a low-noise linear regulator in a compact footprint. Consider the internal compensation which simplifies external component selection compared to non-internal compensated alternatives. Evaluate the total quiescent current requirements against the typical values provided in the datasheet to ensure battery life targets are met during standby modes.

Part Context

This part belongs to the TC1303 series, which includes variants like TC1303A, TC1303C, and TC1304. These devices share common architectural features such as the dual-regulator topology and power-good signaling. The TC1303B specifically denotes a version within this family, distinguished by its particular output voltage options and packaging details defined by the manufacturer's coding scheme.

Replacement Considerations

Direct replacements include other TC1303B variants with compatible suffixes, such as TC1303B-PI3EMF or TC1303B-PO3EMF, provided the output voltage configurations match the application requirements. Verify pin compatibility and thermal performance before substituting.