TC1303B-1P0EMF

Overview

The TC1303B-1P0EMF 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 DFN-10 package measuring 3 x 3 mm with a height of 0.9 mm. The device operates from an input voltage range of 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 between PWM and PFM modes for optimized efficiency across load conditions.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck regulator with a dedicated low-dropout linear regulator in a compact footprint.
• Integrated power-good output signal that provides system status indication with a configurable delay timer.
• Independent shutdown control pins allow separate management of the buck and LDO outputs to minimize standby power consumption.
• Internal compensation circuits eliminate the need for external error amplifier components for both regulator channels.

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing lithium-ion or lithium-polymer cells
• Embedded systems needing simultaneous high-current and low-noise supply rails

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with RoHS standards and lead-free manufacturing processes required for your assembly line. Cross-reference the ordering part number with the manufacturer's latest datasheet revision to avoid discrepancies in pinout or electrical specifications.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single input source without occupying excessive board space. The internal compensation simplifies layout requirements compared to externally compensated alternatives. Consider the thermal performance of the DFN-10 package relative to the expected continuous current loads on both the buck and LDO channels.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like the TC1303A and TC1303C. These devices are designed to replace discrete regulator solutions, reducing component count and assembly time. The family shares common control architectures but differs in output voltage options and specific feature sets such as shutdown capabilities.

Replacement Considerations

Direct replacements include other members of the TC1303 series such as TC1303A or TC1303C, provided the output voltage settings match the application requirements. Verify pin-to-pin compatibility and ensure that the quiescent current and efficiency curves meet the system's power budget constraints.