TC1303B-VA0EMF

Overview

The TC1303B-VA0EMF 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) linear regulator. It operates within an input voltage range of 2.7 V to 5.5 V with a typical quiescent current of 65 µA. The device utilizes a 2.0 MHz fixed-frequency PWM control scheme for the buck converter, which transitions automatically to PFM mode at light loads. It includes independent shutdown controls for both outputs, internal compensation, and a power-good output with a 300 ms delay. The component is housed in a 10-pin DFN package measuring 3 mm x 3 mm.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single compact package
• Provides independent shutdown capabilities for both the buck and LDO outputs to optimize system power consumption
• Features automatic transition between PWM and PFM modes to maintain efficiency across varying load conditions
• Includes a power-good signal output with a configurable delay to ensure stable system sequencing

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 voltage rails for logic and analog circuits
• Industrial control modules operating from standard 3.3 V or 5 V bus supplies

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with RoHS and REACH regulations as indicated in the datasheet. Cross-reference the ordering part number with the manufacturer's latest release notes to account for any potential pinout or functional revisions.

Selection Notes

Select this component when space-constrained designs require both switching regulation efficiency and LDO noise performance. Consider the 2.0 MHz switching frequency for smaller external passive components compared to lower-frequency alternatives. Evaluate the total quiescent current requirements against the 65 µA specification to ensure adequate battery life for portable applications.

Part Context

This part belongs to the TC1303 family of dual-output regulators, designed to replace discrete solutions in modern electronics. It consolidates power management functions into a small footprint, reducing board area and assembly complexity. The family supports various output configurations through different suffix codes, allowing designers to tailor voltage levels without changing the core controller architecture.

Replacement Considerations

Direct replacements include other variants within the TC1303 series such as TC1303A, TC1303C, or TC1304, provided the output voltage settings match the design requirements. Verify that alternative packages like HVSON are electrically compatible if form factor changes are permissible.