TC1303B-VA0EMFTR

Overview

The TC1303B-VA0EMFTR 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. The device operates with an input voltage range of 2.7 V to 5.5 V and includes a power-good output with a 300 ms delay. It utilizes current-mode control with pulse width modulation at a fixed frequency of 2.4 MHz under heavy loads. The component transitions automatically from PWM to PFM mode for efficiency optimization. It is housed in a 10-pin DFN package measuring 3 mm x 3 mm with a height of 0.9 mm.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck converter with a dedicated LDO for independent or combined load requirements.
• Integrated power-good monitoring signal that indicates when regulated outputs have reached their specified stable levels after startup.
• Automatic transition between pulse width modulation and pulse frequency modulation modes to maintain high efficiency across varying load conditions.

Applications

• Portable consumer electronics requiring efficient battery-powered operation
• Embedded systems needing multiple distinct voltage rails from a single source
• Industrial control modules with strict space constraints

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration. Ensure the ordering part number matches the required pinout and thermal characteristics. Confirm compliance with RoHS standards and lead-free specifications as indicated in the manufacturer's datasheet before finalizing procurement.

Selection Notes

Select this component when a compact solution is needed to generate two separate voltage rails from a single input source. Consider the internal compensation which simplifies external component selection. Evaluate the quiescent current requirements against the system's standby needs to ensure optimal battery life performance.

Part Context

This part belongs to the TC1303 family of dual-output regulators. The 'B' designation typically refers to specific output voltage configurations within the series. The family shares common features such as the synchronous buck topology and integrated LDO, differing primarily in fixed output voltages or adjustable ranges defined by the suffix codes.

Replacement Considerations

Consult official Microchip cross-reference lists for verified substitutes. Ensure any replacement maintains the same 10-pin DFN footprint and electrical specifications. Verify compatibility with existing PCB layout and thermal design constraints.