TC1303C-ZS0EUN

Overview

The TC1303C-ZS0EUN is a dual-output power management IC from Microchip Technology, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator. It operates within an input voltage range of 2.7 V to 5.5 V. The device includes a power-good output with a 300 ms delay and supports independent shutdown for both outputs. Total quiescent current is typically 65 µA. The synchronous buck section offers over 90% typical efficiency, 2.0 MHz fixed-frequency PWM at heavy loads, and automatic transition to PFM mode. Output voltages are adjustable from 0.8 V to 4.5 V or fixed at standard values. It is housed in a 10-pin MSOP package.

Feature Summary

• Integrates a 500 mA synchronous buck converter and a 300 mA LDO in a single compact package.
• Provides a power-good status signal with a configurable 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 to minimize standby power consumption.

Applications

• Portable battery-powered electronic devices requiring efficient dual-rail power supply
• Embedded systems needing simultaneous high-current digital logic and analog rail generation
• Industrial control modules with strict size constraints and low quiescent current requirements

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure that the ordering part number matches the required functional specifications, as suffixes may indicate differences in output settings or packaging options. Cross-reference the datasheet revision to confirm compatibility with design requirements.

Selection Notes

Select this component when a compact solution is needed for generating two distinct regulated voltages from a single input source. Consider the 2.0 MHz switching frequency for smaller external passive components. Evaluate the thermal performance in the MSOP package based on the expected load currents and ambient temperature conditions.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for space-constrained applications. It combines switching and linear regulation technologies to provide flexible power distribution. The family is characterized by internal compensation and low noise, suitable for sensitive analog circuits alongside digital loads.

Replacement Considerations

Direct replacements include other variants within the TC1303 series such as TC1303C-ED3EUN or TC1303C-VN3EUN, provided they match the required output voltage and package type. Verify pin-to-pin compatibility and electrical parameters before substitution.