TC1303B-IA0EMF

Overview

The TC1303B-IA0EMF 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 of 2.7 V to 5.5 V and features a fixed switching frequency of 2.0 MHz for the buck converter. It utilizes current-mode control with pulse width modulation, transitioning automatically to pulse frequency modulation at light loads. The component includes independent shutdown controls for both outputs, internal compensation, and a power-good output signal with a 300 ms delay. It is housed in a 10-pin DFN package measuring 3 mm x 3 mm.

Feature Summary

• Dual-output architecture combining a high-efficiency synchronous buck regulator with a low-noise LDO
• Automatic transition between PWM and PFM modes to optimize efficiency across varying load conditions
• Integrated power-good monitoring function providing system status indication with configurable delay
• Independent shutdown capabilities allowing separate control of the buck and LDO output stages

Applications

• Portable battery-powered electronic devices requiring multiple regulated voltage rails
• Embedded systems utilizing microcontrollers or digital signal processors
• Industrial control modules needing efficient power conversion in compact form factors
• Consumer electronics with strict space constraints and low quiescent current requirements

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm pinout compatibility and output voltage settings. Ensure the procurement source provides valid RoHS compliance certificates. Confirm the package variant matches the required PCB footprint specifications. Check for recent production change notices that may affect material composition or testing standards.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single power source without occupying excessive board area. It is suitable for applications prioritizing high efficiency under heavy loads while maintaining low noise for sensitive analog sections. Consider the thermal performance of the DFN package relative to the expected ambient temperature and load current.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for space-constrained portable applications. The series offers various output voltage configurations and package options to accommodate different system requirements. It represents a consolidated solution for replacing discrete regulator components, thereby reducing bill of materials count and assembly complexity.

Replacement Considerations

Direct substitutes include other variants within the TC1303 family such as TC1303A or TC1303C, provided the output voltage and package dimensions are compatible. Verify that any replacement maintains the same switching frequency and pin configuration to ensure seamless integration into existing designs.