TC1303B-PI0EMF

Overview

The TC1303B-PI0EMF 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 measuring 3 x 3 mm with a height of 0.9 mm. The device operates on an input voltage range from 2.7 V to 5.5 V, with a nominal input of 3.6 V. The synchronous buck converter utilizes current-mode control with pulse width modulation at a fixed frequency of 2.4 MHz maximum, featuring automatic transition to PFM mode for light loads. The LDO output provides independent shutdown capability.

Feature Summary

• Dual-output architecture combining a high-efficiency synchronous buck regulator with a dedicated low-dropout linear regulator.
• Integrated power-good output signal with a defined delay period to indicate stable regulation status.
• Automatic switching between PWM and PFM modes to optimize efficiency across varying load conditions.
• Independent shutdown controls allow separate management of the buck and LDO outputs.

Applications

• Portable electronic devices requiring multiple regulated voltage rails
• Battery-powered systems needing efficient step-down conversion
• Embedded applications utilizing microprocessors or memory components

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure that the ordering information matches the required pinout and thermal characteristics for the target PCB layout. Cross-reference the component marking with the datasheet to prevent substitution errors during assembly.

Selection Notes

Select this component when a compact solution is required for generating two distinct voltage levels from a single supply rail. Consider the internal compensation and fixed switching frequency for simplified external component selection. Evaluate the quiescent current specifications against system standby requirements to ensure adequate battery life in portable designs.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for space-constrained applications. The series offers various output voltage configurations through different suffix codes while maintaining a consistent footprint and functional interface. It serves as a consolidated power management alternative to discrete regulator solutions.

Replacement Considerations

Direct substitutes include other variants within the TC1303 family such as TC1303B-PO3EMF or TC1303B-LF1EMF, provided the output voltage settings match the design requirements. Verify pin compatibility and thermal performance before implementing any cross-model replacement.