TC1303B-SE0EMF

Overview

The TC1303B-SE0EMF 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) regulator within a single package. The device operates with an input voltage range of 2.7 V to 5.5 V, featuring a typical quiescent current of 65 µA. The synchronous buck section supports a fixed switching frequency of 2.0 MHz under heavy loads and includes automatic transition from PWM to PFM modes for improved light-load efficiency. Both outputs are internally compensated and offer independent shutdown control.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO regulator in a compact footprint
• Provides a Power-Good output signal with a configurable delay for system monitoring
• Features automatic transition between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes to optimize efficiency across load conditions
• Supports independent shutdown control for both the buck and LDO outputs to minimize standby power consumption

Applications

• Portable consumer electronics requiring efficient dual-rail power distribution
• Battery-powered devices utilizing low-quiescent-current regulators to extend operational life
• Embedded systems needing synchronized power sequencing via the Power-Good output
• Space-constrained designs benefiting from the integrated DFN-10 package solution

Procurement Notes

Verify the specific suffix code SE0 against the official Microchip datasheet to confirm the exact output voltage configuration and pin compatibility. Ensure that the ordering part number matches the required package variant and temperature rating. Cross-reference the manufacturer's latest documentation to confirm RoHS compliance status and any recent design changes or obsolescence notices before finalizing procurement.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single source without external compensation components. The internal compensation simplifies layout and reduces bill of materials. Consider the 2.0 MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives. Verify that the combined load requirements do not exceed the 500 mA buck or 300 mA LDO limits specified in the electrical characteristics table.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like TC1303A, TC1303C, and TC1304. These devices share a common architecture but differ in output voltage options, package types, and specific feature sets such as shutdown capabilities. The TC1303B specifically denotes a version with defined output voltage configurations and performance characteristics suitable for general-purpose portable applications.

Replacement Considerations

Direct substitutes include other members of the TC1303 family, such as TC1303A-SE0EMF or TC1303C-SE0EMF, provided the output voltage settings match the application requirements. Ensure that any replacement maintains the same DFN-10 package dimensions and pinout to guarantee mechanical and electrical compatibility on existing PCB layouts.