TC1303B-PA0EMFTR

Overview

The TC1303B-PA0EMFTR is a dual-output power management IC from Microchip Technology, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator. The device operates with an input voltage range of 2.7 V to 5.5 V and includes a power-good output signal with a 300 ms delay. It utilizes current-mode control for the buck converter, which supports both pulse-width modulation (PWM) and pulse-frequency modulation (PFM) modes. The total quiescent current is typically 65 µA. The component is housed in a 10-pin DFN package measuring 3 mm by 3 mm with a height of 0.9 mm.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a separate LDO within a single compact package
• Provides independent shutdown control for both the buck and LDO outputs to optimize system power consumption
• Features automatic transition between PWM and PFM modes to maintain efficiency across varying load conditions
• Includes an internally compensated design for simplified application circuit implementation

Applications

• Portable battery-powered consumer electronics requiring efficient dual-rail power distribution
• Embedded systems needing simultaneous regulation for digital logic and analog peripherals
• Industrial control modules operating within standard low-voltage DC supply ranges

Procurement Notes

Verify the specific output voltage configuration associated with the PA0 suffix against the official Microchip datasheet before procurement. Ensure that the required thermal performance aligns with the 3x3 mm DFN package limitations for your intended application environment. Confirm compliance with RoHS standards and lead-free specifications as indicated in the manufacturer's documentation.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single input source without external compensation components. Consider the 500 mA buck current limit and 300 mA LDO capability to ensure adequate headroom for peak loads. Evaluate the 2.0 MHz switching frequency impact on passive component sizing and electromagnetic interference requirements relative to the system layout constraints.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like the TC1303A and TC1303C. These devices are designed to replace discrete regulator solutions, reducing board space and component count. The TC1303B specifically denotes the version with the power-good output feature, distinguishing it from other family members that may lack this status indication.

Replacement Considerations

Direct pin-to-pin replacements within the same family include TC1303A-PA0EMFTR or TC1303C-PA0EMFTR, provided the power-good feature requirement matches. Cross-manufacturer equivalents require careful verification of electrical parameters and thermal characteristics.