TC1303B-PA0EUN

Overview

The TC1303B-PA0EUN 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 typical total quiescent current of 65 µA. The synchronous buck converter supports a fixed switching frequency of 2.0 MHz, offers over 90% typical efficiency, and includes automatic transition from PWM to PFM mode for improved light-load performance. The component is housed in a 10-pin MSOP package.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck regulator with a dedicated low-dropout linear regulator
• Integrated power-good output signal providing system status indication with a defined delay period
• Independent shutdown control capabilities allowing separate management of the buck and LDO outputs
• Internal compensation for both regulators simplifying external component requirements and design complexity

Applications

• Portable battery-powered electronic devices requiring multiple regulated voltage rails
• Embedded systems utilizing microcontrollers or digital logic requiring stable power sequencing
• Consumer electronics needing efficient power conversion with low standby current consumption

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with required thermal dissipation standards for the MSOP-10 footprint. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement specifications.

Selection Notes

Select this component when a compact solution is needed for generating two distinct voltage levels from a single input source. Consider the 2.0 MHz switching frequency for minimizing passive component size while maintaining efficiency. Evaluate the independent shutdown feature if power management flexibility is required for different operational modes.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like TC1303A, TC1303C, and TC1304. These components share similar functional architectures but may differ in output voltage options, package types, or specific electrical characteristics. The TC1303B designation indicates a specific version within this series optimized for standard operating conditions.

Replacement Considerations

Direct substitutes include other members of the TC1303 family such as TC1303A or TC1303C, provided their output voltage configurations match the design requirements. Verify pinout compatibility and thermal performance before substituting.