TC1303A-ZP0EUN

Overview

The TC1303A-ZP0EUN is a dual-output power management IC from Microchip Technology, featuring 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 incorporates a power-good output with a 300 ms delay for processor reset monitoring. Total quiescent current is typically 65 µA. The buck converter supports adjustable outputs from 0.8 V to 4.5 V or standard fixed voltages, utilizing automatic PWM to PFM mode transition. It is housed in a 10-pin MSOP package.

Feature Summary

• Dual-output architecture combining a 500 mA synchronous buck regulator and a 300 mA LDO
• Power-good output function with a 300 ms delay for system monitoring
• Automatic transition between PWM and PFM modes for optimized efficiency
• Independent shutdown control for both buck and LDO outputs

Applications

• Portable consumer electronics requiring efficient dual-rail power
• Battery-powered devices needing extended runtime via low quiescent current
• Systems requiring sequenced startup and reliable power supervision
• Embedded applications with space constraints using compact packaging

Procurement Notes

Verify the specific suffix ZP0EUN against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with required input voltage ranges and thermal dissipation limits for the MSOP-10 package. Cross-reference RoHS compliance status and humidity sensitivity levels prior to integration into production designs.

Selection Notes

Select this component when a single solution is needed for both high-current switching regulation and low-noise linear regulation. The internal compensation simplifies design by reducing external component count. Consider the automatic mode transition feature for applications where load currents vary significantly between heavy and light conditions.

Part Context

This part belongs to the TC1303/TC1304 family of dual-output regulators. Variants differ primarily in output voltage settings and power-good monitoring capabilities. The TC1303 series specifically offers independent shutdown controls, distinguishing it from the TC1304 which features sequenced startup. The ZP0EUN suffix indicates a specific fixed output voltage combination within the MSOP-10 package.

Replacement Considerations

Direct substitutes include other TC1303A variants with matching output voltages, such as TC1303A-DI0EUN or TC1303A-SB1EUN, provided the pinout and electrical characteristics align. Verify that alternative packages like DFN-10 are mechanically compatible if footprint changes are permissible.