TC1303B-PF0EUN

Overview

The TC1303B-PF0EUN is a dual-output power management IC 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 nominal rating of 3.6 V. The device utilizes current-mode control with pulse width modulation for the buck section, supporting a maximum switching frequency of 2400 kHz. It includes automatic transition from PWM to PFM mode for efficiency optimization at light loads. The component is housed in a 10-pin MSOP-10 plastic package.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a low-noise LDO in a single compact package
• Provides independent shutdown control for both the buck and LDO outputs to minimize standby power consumption
• Features an internal power-good output signal with a defined delay to indicate valid regulation status
• Supports automatic transition between pulse width modulation and pulse frequency modulation modes

Applications

• Portable consumer electronics requiring multiple regulated voltage rails
• Battery-powered devices utilizing lithium-ion or lithium-polymer cells
• Embedded systems needing efficient step-down conversion with auxiliary analog supply
• Mobile communication modules requiring low quiescent current operation

Procurement Notes

Verify the specific suffix PF0EUN against the manufacturer's official ordering guide to confirm the exact pin configuration and tape-and-reel specifications. Ensure the selected variant matches the required thermal performance and moisture sensitivity level for the intended assembly process. Cross-reference the date code and lot information to maintain supply chain consistency.

Selection Notes

Select this component when a combined solution for digital logic power and analog circuit biasing is required. The integrated design reduces board space compared to discrete regulators. Consider the total quiescent current and the specific output voltage options available in the datasheet to ensure compatibility with downstream load requirements.

Part Context

This part belongs to the TC1303 family of dual-output regulators manufactured by Microchip Technology. The series is designed to replace separate buck and LDO components, offering a simplified bill of materials. Variants within the family differ primarily in output voltage configurations and packaging styles while maintaining identical electrical characteristics.

Replacement Considerations

Direct replacements include other TC1303B variants with different output voltages or packages, such as TC1303B-PI3EMF or TC1303B-YP3EUN. Verify that the substitute part number maintains the same 10-pin MSOP footprint and electrical ratings before implementation.