TC1303B-SA0EMFTR

Overview

The TC1303B-SA0EMFTR is a dual-output power management IC from Microchip Technology, integrating a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) linear regulator. It operates within an input voltage range of 2.7 V to 5.5 V, with a nominal rating of 3.6 V. The device features a 2.0 MHz fixed-frequency PWM for the buck converter, ensuring high efficiency over 90% under heavy loads. It includes automatic transition between PWM and PFM modes, independent shutdown controls for both outputs, and a power-good output signal with a 300 ms delay. The total quiescent current is typically 65 µA.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single package
• Provides independent shutdown control for both the buck and LDO outputs
• Features automatic transition from PWM to PFM mode for optimized light-load efficiency
• Includes a power-good output indicator with a specified 300 ms delay

Applications

• Portable battery-powered electronic devices requiring multiple regulated voltages
• Embedded systems utilizing microcontrollers or application processors
• Industrial control modules with space-constrained power supply designs
• Communication equipment needing efficient step-down regulation

Procurement Notes

Verify the specific suffix SA0 against the official Microchip datasheet to confirm the exact output voltage configuration. Ensure the ordering part number matches the required package variant and tape-and-reel specifications. Cross-reference the manufacturer's latest documentation to validate compliance with RoHS standards and lead-free requirements before finalizing procurement orders.

Selection Notes

Select this component when a compact solution is needed for generating two distinct voltage rails from a single source. The integrated design reduces bill-of-materials count compared to discrete regulators. Consider the 2.0 MHz switching frequency for minimizing external passive component sizes while maintaining stable regulation across varying load conditions.

Part Context

This part belongs to the TC1303 family, which combines switching and linear regulation technologies. The series is designed for applications demanding high efficiency and low noise. The TC1303B variant specifically offers the 500 mA buck and 300 mA LDO combination, distinguishing it from other family members that may have different current ratings or feature sets.

Replacement Considerations

Compatible substitutes include TC1303A, TC1303C, and TC1304 variants from Microchip. Verify pin compatibility and electrical parameters such as output current limits and voltage ranges before substitution.