TC1303B-PI0EUNTR

Overview

The TC1303B-PI0EUNTR is a dual-output power management integrated circuit manufactured by Microchip Technology. It integrates a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator within a single MSOP-10 package. The device operates with an input voltage range of 2.7 V to 5.5 V. The synchronous buck converter supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed outputs, featuring a 2.0 MHz switching frequency and automatic transition between PWM and PFM modes for optimized efficiency. The LDO provides stable regulation with a typical quiescent current of 65 µA. Both regulators are internally compensated and include independent shutdown controls.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a compact MSOP-10 package
• Features automatic transition between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes for high efficiency across load conditions
• Includes a Power-Good output signal with a 300 ms delay for system monitoring
• Supports independent shutdown control for both the buck and LDO outputs

Applications

• Portable consumer electronics requiring multiple voltage rails
• Battery-powered devices needing efficient step-down conversion
• Systems utilizing USB power sources
• Embedded applications with space-constrained PCB layouts

Procurement Notes

Verify the specific suffix PI0EUNTR against the official Microchip datasheet to confirm the exact output voltage configuration and packaging details. Ensure compatibility with the required input voltage range of 2.7 V to 5.5 V. Confirm that the MSOP-10 package dimensions meet the design constraints. Check for RoHS compliance status if required by the manufacturing process.

Selection Notes

Select this component when a single-chip solution is needed for generating two distinct regulated voltages from a single input source. It is suitable for designs prioritizing board space reduction and high efficiency in portable applications. Consider the internal compensation which simplifies external component selection compared to non-compensated alternatives. Evaluate the thermal performance requirements given the 500 mA buck and 300 mA LDO capabilities in the small package.

Part Context

The TC1303B belongs to the TC1303/TC1304 series of power management ICs designed for portable electronics. This family combines switching and linear regulation technologies to address diverse power needs in mobile devices. The TC1303B specifically includes a Power-Good monitor, distinguishing it from variants like the TC1303C which may lack this feature. It represents a consolidated approach to power distribution in compact electronic systems.

Replacement Considerations

The TC1303A is a similar variant within the same family but lacks the Power-Good output feature found in the TC1303B. Verify if the absence of the Power-Good signal impacts system functionality before substitution. Other members of the TC1303 series may offer different output configurations or pinouts; consult the specific datasheet for electrical and mechanical compatibility.