TC1304-ZA0EMF

Overview

The TC1304-ZA0EMF 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 from 2.7 V to 5.5 V. The synchronous buck section supports a fixed switching frequency of 2.0 MHz under heavy load conditions and features automatic transition between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes to optimize efficiency across varying load currents. The LDO output provides stable regulation for auxiliary circuits.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a low-noise LDO in a compact footprint
• Features automatic mode transition between PWM and PFM for optimized light-load performance
• Includes a power-good output signal with a defined delay time for system monitoring
• Provides independent shutdown control capabilities for the buck and LDO outputs

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Embedded systems utilizing microcontrollers with distinct core and I/O voltage requirements
• Battery-powered devices necessitating extended operational runtime through optimized conversion efficiency
• Industrial control modules requiring stable voltage regulation under variable load conditions

Procurement Notes

Verify the specific suffix code to confirm the exact output voltage configuration, as the base model supports various fixed and adjustable settings. Ensure compatibility with the required thermal dissipation characteristics for the selected DFN-10 package variant. Confirm that the supply chain source provides authentic components with valid traceability documentation to guarantee reliability in final assembly processes.

Selection Notes

Select this component when a design requires both high-current switching regulation and precise low-noise linear regulation from a single power rail. Consider the internal compensation which simplifies external component selection compared to non-compensated alternatives. Evaluate the total quiescent current specifications against standby power constraints to ensure the device meets the efficiency targets for the intended application profile.

Part Context

This part belongs to the TC1303/TC1304 family of dual-output regulators designed for space-constrained applications. The series combines the advantages of synchronous buck technology with the simplicity of LDOs. Variations within the family differ primarily in output voltage configurations and package options, sharing common control architectures and protection features.

Replacement Considerations

Direct substitutes include other variants within the TC1303/TC1304 series such as TC1304-SA1EMF or TC1304-DQ0EMF, provided the output voltage settings match the design requirements. Cross-referencing pinouts and thermal pad connections is essential when replacing with parts from different manufacturers offering similar dual-regulator topologies.