TC1303A-ZA0EUNTR

Overview

The TC1303A-ZA0EUNTR is a dual-output power management IC 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, with a typical nominal input of 3.6 V. The device utilizes a 2.0 MHz fixed-frequency PWM control scheme for the buck converter, ensuring high efficiency exceeding 90% under heavy loads. Total quiescent current is typically 65 µA. The component 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 varying load conditions
• Includes a power-good output signal with a 300 ms delay for reliable system monitoring
• Provides independent shutdown controls for both the buck and LDO outputs

Applications

• Portable battery-powered electronic devices requiring efficient dual-rail power distribution
• Embedded systems utilizing microcontrollers needing stable logic and analog supply rails
• Industrial control modules operating from single-cell lithium-ion or alkaline battery sources

Procurement Notes

Verify that the specific suffix ZA0 corresponds to the required fixed output voltage configuration, as variations exist within the TC1303 family. Confirm the MSOP-10 package marking matches the official Microchip datasheet specifications. Ensure compliance with RoHS standards and lead-free requirements during procurement validation.

Selection Notes

Select this component when a design requires simultaneous generation of two distinct voltage rails from a single input source. It is suitable for applications prioritizing space efficiency due to the integrated dual-regulator architecture. Consider the 2.0 MHz switching frequency regarding electromagnetic interference constraints and the need for external component sizing.

Part Context

This part belongs to the TC1303 series, which combines switching and linear regulation technologies. The series is designed to provide flexible power solutions for portable electronics. The 'A' designation indicates specific electrical characteristics and output configurations defined by the manufacturer for this particular variant.

Replacement Considerations

TC1303B-ZA0EUNTR, TC1303C-ZA0EUNTR