TC1303A-ZP0EUNTR

Overview

The TC1303A-ZP0EUNTR 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, with a nominal rating of 3.6 V. The device utilizes current-mode control and pulse width modulation, switching at a fixed frequency of 2.0 MHz under heavy loads. It supports adjustable output voltages from 0.8 V to 4.5 V for the buck converter and includes standard fixed options. Total quiescent current is typically 65 µA, and it offers independent shutdown controls for both outputs.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single compact package
• Features automatic transition between PWM and PFM modes to optimize efficiency across varying load conditions
• Includes a power-good output signal with a configurable delay to indicate stable regulation status
• Provides independent shutdown pins for the buck and LDO sections to minimize standby power consumption

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices needing extended operational life through low quiescent current
• Embedded systems utilizing microcontrollers or sensors with distinct voltage requirements
• Industrial control modules operating within wide input voltage ranges

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm output voltage configuration and package variant. Ensure compatibility with RoHS standards if required by your manufacturing process. Cross-reference the datasheet revision date to validate feature availability. Confirm thermal performance requirements align with the MSOP-10 package limitations for your intended application environment.

Selection Notes

Select this component when a combined switching regulator and LDO solution is needed to save board space. The internal compensation simplifies design compared to discrete solutions. Consider the 2.0 MHz switching frequency for smaller external inductor sizes. Verify that the 500 mA buck current and 300 mA LDO current meet the peak load demands of the target circuit without exceeding thermal limits.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for space-constrained applications. It complements similar models like the TC1303B and TC1303C, which may offer different output configurations or pinouts. The series is engineered for portable electronics, balancing high efficiency with minimal external component counts. It represents Microchip's approach to integrated power management for modern low-voltage digital systems.

Replacement Considerations

Direct substitutes include other variants within the TC1303 family, such as TC1303A-EI3EUNTR or TC1303A-MB0EUNTR, provided the output voltage settings match. Verify pin-to-pin compatibility and electrical specifications before substitution. Consult the manufacturer's cross-reference guide for approved alternatives with identical functionality and packaging.