TC1303C-ZI0EMFTR

Overview

The TC1303C-ZI0EMFTR 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 power-good output with a 300 ms delay and supports independent shutdown for both outputs. The buck converter utilizes current-mode control with a fixed-frequency PWM at 2.0 MHz under heavy loads, transitioning automatically to PFM mode for efficiency. Total quiescent current is typically 65 µA.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single package
• Provides a power-good signal with a 300 ms delay for system monitoring
• Supports independent shutdown control for the buck and LDO outputs
• Features automatic transition between PWM and PFM modes for optimized efficiency

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 'ZI0' against the official Microchip datasheet DS51617A to confirm the exact output voltage configuration. Ensure the ordering part number matches the required package variant and tape-and-reel specifications. Cross-reference the manufacturer's latest documentation to validate RoHS compliance and availability status before finalizing procurement.

Selection Notes

Select this component when a compact dual-rail solution is required for battery-operated systems. It is suitable for applications needing simultaneous high-current switching regulation and clean LDO supply. Consider the 2.0 MHz switching frequency for smaller passive components. Verify that the input voltage range of 2.7 V to 5.5 V aligns with the system power source.

Part Context

This part belongs to the TC1303 family, which combines a synchronous buck converter with an LDO. The 'C' designation indicates the adjustable or specific fixed-voltage variant within the series. It is designed for space-constrained portable electronics requiring efficient power management from a single cell or USB source.

Replacement Considerations

Check Microchip's official replacement matrix for direct pin-compatible alternatives such as other TC1303 variants with different output voltages. Ensure any substitute maintains the same DFN-10 package dimensions and thermal characteristics.