TC1303C-ZS0EMF

Overview

The TC1303C-ZS0EMF is a dual-output power management IC from Microchip Technology, integrating a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) regulator. It operates within an input voltage range of 2.7 V to 5.5 V. The device features a typical total quiescent current of 65 µA and includes a Power-Good output with a 300 ms delay. The synchronous buck converter supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed outputs, utilizing a 2.0 MHz fixed-frequency PWM mode under heavy loads with automatic transition to PFM for efficiency.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single package
• Provides independent shutdown control for both the buck and LDO outputs
• Features a Power-Good signal with a 300 ms delay for system monitoring
• Includes internal compensation for both regulators to simplify design

Applications

• Cellular phones and mobile devices
• Portable computers and laptops
• USB-powered peripheral devices
• Handheld instruments and test equipment

Procurement Notes

Verify the specific suffix ZS0 against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with required thermal dissipation standards for the DFN-10 package. Confirm RoHS compliance status through the manufacturer's latest datasheet revision before finalizing procurement specifications.

Selection Notes

Select this component when a compact dual-rail solution is required for battery-operated systems. The integrated Power-Good monitor simplifies sequencing logic compared to discrete solutions. Consider the 2.0 MHz switching frequency for minimizing external passive component size while maintaining high efficiency across varying load conditions.

Part Context

This part belongs to the TC1303 family, which combines DC-DC and LDO technologies. The 'C' designation typically indicates specific electrical characteristics or revisions within the series. It is designed to replace multiple discrete components, reducing board space and assembly complexity in portable electronics requiring stable dual voltage rails.

Replacement Considerations

Consult Microchip's official cross-reference tools for verified substitutes. Ensure any replacement maintains the 500 mA buck and 300 mA LDO current ratings and compatible pinout configurations.