TC1303B-SP0EMF

Overview

The TC1303B-SP0EMF 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 10-pin DFN 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 buck converter utilizes a fixed-frequency PWM control scheme at 2.0 MHz for heavy loads, transitioning automatically to PFM mode for improved light-load efficiency. Both outputs are internally compensated, and the component includes a power-good output signal with a 300 ms delay.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a compact footprint
• Features automatic transition between PWM and PFM modes for optimized efficiency across load conditions
• Provides independent shutdown control for both the buck and LDO outputs
• Includes a power-good indicator with a specified delay time for system monitoring

Applications

• Portable battery-powered electronic devices requiring multiple regulated voltage rails
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries
• Industrial control modules needing efficient DC-DC conversion with low noise
• Automotive infotainment and sensor interfaces operating within standard automotive voltage ranges

Procurement Notes

Verify the specific suffix SP0 against official Microchip documentation to confirm the exact output voltage configuration, as this determines functional compatibility. Ensure the procurement channel provides RoHS compliance certificates, noting that some distributor listings may contain conflicting environmental status data. Confirm the package type matches the required PCB layout specifications before finalizing orders.

Selection Notes

Select this component when space-constrained designs require both high-current switching regulation and low-noise linear regulation from a single source. The internal compensation simplifies external component selection compared to discrete solutions. Consider the 2.0 MHz switching frequency for smaller passive components, while accounting for the thermal dissipation requirements inherent to the DFN-10 package under maximum load conditions.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like TC1303A and TC1303C. These devices share the same core architecture but may differ in specific electrical characteristics or output configurations. The TC1303B variant specifically denotes the performance grade and feature set defined in the manufacturer's datasheet for this series.

Replacement Considerations

Direct replacements include other members of the TC1303 family such as TC1303A-SP0EMF or TC1303C-SP0EMF, provided their specific electrical parameters match the design requirements. Cross-referencing pinouts and thermal characteristics is essential when substituting with components from different manufacturers.