TC1304-ZA0EUN

Overview

The TC1304-ZA0EUN is a dual-output power management IC from Microchip Technology, integrating 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 buck converter supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed outputs, featuring a 2.0 MHz fixed-frequency PWM operation with automatic transition to PFM mode for improved light-load efficiency. The LDO provides a typical quiescent current of 65 µA. The device includes a power-good output with a 300 ms delay and is housed in a 10-pin MSOP package.

Feature Summary

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

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing synchronous buck conversion for extended runtime
• Embedded systems needing simultaneous regulated logic and analog supply rails
• Industrial control modules operating within wide input voltage ranges

Procurement Notes

Verify the specific suffix code ZA0 against the official Microchip datasheet to confirm the exact fixed output voltage configuration. Ensure the MSOP-10 package variant matches your PCB footprint requirements. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning. Cross-reference the part number with authorized distributors to ensure genuine sourcing.

Selection Notes

Select this component when a combined switching and linear regulation solution is required to save board space. The internal compensation simplifies design by reducing external component count. Consider the 2.0 MHz switching frequency for smaller passive components. Evaluate the total quiescent current impact on battery life if the device remains active during standby modes.

Part Context

The TC1304 belongs to a family of dual-output regulators that combine high-efficiency switching with precise linear regulation. This architecture allows designers to handle both high-current digital loads and sensitive analog circuits efficiently. The series typically offers various output voltage options and packaging styles to suit different form factor constraints.

Replacement Considerations

Check the TC1303 series for variants with independent shutdown controls if separate enable pins are needed. Review other Microchip PMICs with similar 500 mA buck and 300 mA LDO configurations for pin-compatible alternatives.