TC1303B-PG0EMF

Overview

The TC1303B-PG0EMF 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 package. The device operates with an input voltage range of 2.7 V to 5.5 V, featuring a nominal input of 3.6 V. The synchronous buck converter supports a fixed switching frequency of 2.0 MHz under heavy load conditions and offers adjustable output voltages from 0.8 V to 4.5 V alongside standard fixed options. The LDO provides independent shutdown control for both outputs. The component utilizes a 10-pin DFN-10 package measuring 3 mm x 3 mm with a height of 0.9 mm.

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 specified delay time for system monitoring
• Provides independent shutdown controls for the buck and LDO outputs to manage power states

Applications

• Portable battery-powered consumer electronics requiring efficient dual-rail power
• Embedded systems utilizing microcontrollers or application processors needing stable logic and analog supplies
• Industrial control modules operating within standard low-voltage DC ranges
• Communication equipment requiring low-noise power delivery for sensitive RF or digital sections

Procurement Notes

Verify that the specific suffix PG0 corresponds to the required output voltage configuration and packaging variant. Confirm compliance with RoHS standards and lead-free requirements as indicated by the EMF suffix. Ensure the ordering part number matches the exact pinout and thermal pad specifications for the DFN-10 package to guarantee mechanical compatibility with the target PCB footprint.

Selection Notes

Select this component when a design requires both high-efficiency switching regulation and low-noise linear regulation in a space-constrained environment. The internal compensation simplifies external component selection, reducing board space. Consider the 2.0 MHz switching frequency for smaller passive components compared to lower-frequency alternatives. Verify that the total quiescent current meets the standby power requirements of the application.

Part Context

This part belongs to the TC1303 family of dual-output regulators from Microchip Technology. The family includes variants such as TC1303A, TC1303C, and TC1304, which share similar functional architectures but may differ in output currents, fixed voltage options, or package types. The TC1303B specifically denotes the version with the defined 500 mA buck and 300 mA LDO capabilities.

Replacement Considerations

Direct substitutes include other members of the TC1303 series such as TC1303A or TC1303C, provided the output voltage settings and package dimensions are compatible. Cross-reference with TC1304 if higher current ratings are acceptable. Always verify electrical parameters and pin assignments before substitution.