TC1303C-ZI0EMF

Overview

The TC1303C-ZI0EMF 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 independent shutdown controls for both outputs. Total quiescent current is typically 65 µA. The buck converter supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed settings, utilizing a 2.0 MHz fixed-frequency PWM mode that transitions automatically to PFM for efficiency. Both outputs are internally compensated.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration, as suffixes determine fixed or adjustable parameters. Ensure the ordering part number matches the required pinout and thermal characteristics for the target PCB layout. Cross-reference the datasheet revision to confirm compliance with current environmental standards and manufacturing specifications before finalizing procurement.

Selection Notes

Select this component when a compact solution is required for dual-rail power systems in battery-operated devices. It is suitable for applications needing simultaneous high-current switching regulation and low-noise linear regulation. Consider the 2.0 MHz switching frequency for smaller passive component sizes. Verify that the input voltage range aligns with the system's power source and that the thermal performance of the DFN-10 package meets the application's heat dissipation requirements.

Part Context

The TC1303C belongs to the TC1303 family of dual-output regulators designed for space-constrained portable electronics. This series combines switching and linear technologies to maximize battery life while maintaining stable power delivery. The ZI0EMF variant specifies the package type, temperature range, and reel packaging details consistent with Microchip's surface-mount product line for mass production integration.

Replacement Considerations

Check Microchip's official replacement lists for direct equivalents. Verify pin compatibility and electrical specifications if considering third-party alternatives. Ensure any substitute maintains the dual-output architecture and power-good functionality required by the design.