TC1303B-ZI0EMF

Overview

The TC1303B-ZI0EMF 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-lead DFN 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 rating of 3.6 V. The switching regulator utilizes current-mode control with pulse width modulation at a fixed frequency of 2.0 MHz under heavy loads, transitioning automatically to pulse frequency modulation for improved light-load efficiency. Both outputs are internally compensated.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck converter with a dedicated low-dropout linear regulator
• Automatic transition between pulse width modulation and pulse frequency modulation modes to optimize efficiency across varying load conditions
• Integrated power-good output signal providing system status indication with a defined delay period
• Independent shutdown control capabilities allowing separate management of the buck and LDO output stages

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded systems needing simultaneous regulated rails for logic and analog components
• Industrial control modules operating within standard industrial temperature ranges

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration, as variations exist within the TC1303B family. Ensure compatibility with RoHS and REACH standards if required by your manufacturing process. Confirm the package type matches your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a compact solution is needed to generate two distinct voltage rails from a single input source. The internal compensation simplifies design implementation by reducing external component count. Consider the thermal performance of the exposed pad in the DFN package for adequate heat dissipation during continuous operation at maximum load currents.

Part Context

This part belongs to the TC1303 series, which features integrated power management solutions designed for space-constrained applications. The series includes variants with different fixed output voltages and adjustable options. The TC1303B designation specifically indicates the version with independent shutdown controls for the buck and LDO sections, offering greater flexibility in power sequencing and management strategies.

Replacement Considerations

Direct substitutes include other TC1303B variants with matching output configurations, such as TC1303B-SA0EMFTR. Verify that any replacement maintains the same pinout and electrical characteristics to ensure board-level compatibility without redesign.