TC1303A-ZA0EMFTR

Overview

The TC1303A-ZA0EMFTR is a dual-output power management IC from 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. The buck converter supports a fixed switching frequency of 2.0 MHz with automatic transition between PWM and PFM modes for optimized efficiency. The device includes a power-good output with a 300 ms delay and independent shutdown controls for both outputs. It is housed in a 10-lead DFN package measuring 3 mm x 3 mm.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single compact package
• Provides independent shutdown control for the buck and LDO outputs to manage system power states
• Includes a power-good monitoring function with a configurable delay to ensure stable startup sequencing
• Features automatic mode transition between pulse-width modulation and pulse-frequency modulation

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices utilizing the integrated LDO for noise-sensitive analog circuits
• Embedded systems needing independent output control for peripheral power management
• Industrial applications requiring robust power regulation within a small form factor

Procurement Notes

Verify the specific suffix ZA0EMFTR against official Microchip documentation to confirm the exact output voltage configuration and tape-and-reel packaging specifications. Ensure compatibility with your board's thermal design, as the DFN-10 package relies on PCB copper for heat dissipation. Cross-reference the RoHS compliance status and lead-free markings with the manufacturer's current datasheet revision to meet regulatory requirements.

Selection Notes

Select this component when a combined switching and linear regulation solution is required to save board space. The TC1303A series is suitable for designs needing a high-current buck rail alongside a clean LDO supply. Consider the 2.0 MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives. Verify that the adjustable or fixed output voltages match the target load requirements before finalizing the part number.

Part Context

This part belongs to the TC1303 family of dual-output regulators designed by Microchip Technology. The family typically includes variants like TC1303B and TC1303C, which may differ in output current capabilities or feature sets. The TC1303A specifically offers a 500 mA buck and 300 mA LDO combination. These devices are engineered for applications demanding high efficiency and low quiescent current in portable and industrial environments.

Replacement Considerations

Direct substitutes include other TC1303A variants with different output voltage suffixes, such as TC1303A-YL0EMFTR or TC1303A-EK3EMFTR. Ensure the replacement maintains the same DFN-10 footprint and pinout configuration. Verify that the electrical characteristics, particularly the output voltage settings and shutdown logic, align with the original design specifications.