TC1303B-SD0EMFTR

Overview

The TC1303B-SD0EMFTR 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 and features a typical total quiescent current of 65 µA. The synchronous buck converter utilizes a fixed 2.0 MHz PWM frequency under heavy loads and supports automatic transition to PFM mode for improved light-load efficiency. The unit is housed in a 10-pin DFN package measuring 3 mm x 3 mm.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck regulator with a dedicated LDO
• Integrated power-good output signal indicating valid regulation status
• Automatic switching between PWM and PFM modes to optimize efficiency across load conditions
• Independent shutdown control pins for both the buck and LDO outputs

Applications

• Portable consumer electronics requiring multiple regulated voltage rails
• Battery-powered devices needing efficient step-down conversion and stable LDO supply
• Embedded systems utilizing microcontrollers with distinct core and I/O voltage requirements

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm output voltage configurations, as these determine functional compatibility. Ensure the ordering part number matches the required package variant and tape-and-reel specifications. Cross-reference the manufacturer's latest datasheet to validate pin assignments and thermal characteristics before finalizing procurement orders.

Selection Notes

Select this component when a design requires two independent regulated outputs from a single IC footprint. The integrated nature reduces board space compared to discrete solutions. Consider the 2.0 MHz switching frequency for minimizing external passive component sizes while maintaining acceptable noise levels. Verify that the combined load currents do not exceed the specified limits for either the buck or LDO channel simultaneously.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for space-constrained applications. The series typically includes variants with different fixed output voltages or adjustable options. The TC1303B designation specifically denotes the version with the integrated power-good feature and specific internal compensation settings defined by the manufacturer.

Replacement Considerations

Direct substitutes include other TC1303B variants with matching output voltage codes and the same DFN-10 package. Verify electrical equivalence regarding input voltage ranges and current capabilities before substitution.