TC1303B-1H0EMFTR

Overview

The TC1303B-1H0EMFTR is a dual-output power management IC manufactured by Microchip Technology, featuring 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 utilizes current-mode control and pulse width modulation (PWM) for the buck section, which runs at a fixed frequency of 2.0 MHz under heavy loads. It incorporates automatic transition from PWM to pulse frequency modulation (PFM) modes to optimize efficiency during light load conditions. The component is housed in a compact 10-pin DFN package measuring 3 mm x 3 mm with a height of 0.9 mm.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a separate LDO regulator on a single chip
• Provides a power-good output signal with a configurable delay to indicate stable regulation
• Supports independent shutdown control for both the buck and LDO outputs to minimize standby consumption
• Features internal compensation for both regulators to simplify external component requirements

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 isolated shutdown capabilities for peripheral power domains
• Industrial control modules operating within standard 3.3 V logic voltage ranges

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration, as alphanumeric designators define functional parameters. Ensure compatibility with RoHS standards and lead-free manufacturing processes required for your assembly line. Cross-reference the package dimensions and thermal characteristics with your PCB layout guidelines before finalizing procurement orders.

Selection Notes

Select this component when a combined solution for switching and linear regulation is necessary to save board space. The 500 mA buck capacity suits moderate load applications, while the integrated LDO provides clean power for sensitive analog circuits. Consider the 2.0 MHz switching frequency for balancing electromagnetic interference and passive component size. Verify that the required output voltages align with the available factory-set options or adjustable configurations.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed for space-constrained applications. The series includes variants like the TC1303A and TC1303C, which may differ in output voltage settings or pin configurations. The TC1303B specifically denotes a particular output voltage combination within this lineup. All members share the same core architecture, packaging, and electrical characteristics regarding input ranges and control methods.

Replacement Considerations

Direct replacements include other TC1303B variants with different output voltage suffixes if the electrical function matches the application needs. Check datasheets for pin-to-pin compatibility and identical thermal performance. Substitutes must maintain the same 10-pin DFN footprint and support the required 500 mA buck and 300 mA LDO currents.