TC1303A-PP3EUN

Overview

The TC1303A-PP3EUN 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 device provides fixed output voltages of 1.8 V for both the buck and LDO channels. Key electrical specifications include a typical total quiescent current of 65 µA and dropout voltages of 205 mV for the buck regulator and 280 mV for the LDO at specified loads. It features a Power-Good output with a 300 ms delay and supports independent shutdown control for each output channel.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single package
• Provides independent shutdown control for both the buck and LDO outputs
• Features a Power-Good signal with a programmable 300 ms delay for system monitoring
• Supports automatic transition between PWM and PFM modes for optimized light-load efficiency

Applications

• Portable consumer electronics requiring multiple regulated voltage rails
• Embedded systems utilizing microprocessors or memory components
• Battery-powered devices needing efficient power conversion and low standby current
• Industrial control modules operating within standard voltage ranges

Procurement Notes

Verify the specific suffix PP3EUN against the official Microchip datasheet to confirm the fixed 1.8 V output configuration and MSOP-10 packaging. Ensure compatibility with your board's thermal requirements and input voltage constraints before ordering. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a compact solution is needed for generating two distinct regulated voltages from a single input source. It is suitable for designs prioritizing low quiescent current and integrated power-good signaling. Consider the fixed 1.8 V outputs; if adjustable voltages are required, alternative variants within the TC1303 family should be evaluated.

Part Context

This part belongs to the TC1303 series of dual-output regulators, which combine switching and linear regulation technologies. The series is designed for applications demanding high efficiency and low noise. The TC1303A variant specifically monitors the buck output for its Power-Good function, distinguishing it from other family members that may monitor different outputs.

Replacement Considerations

Check for other TC1303A variants with different output voltages or packages if the 1.8 V fixed output does not match design requirements. Verify pin-to-pin compatibility with existing PCB layouts when considering substitutes.