TC1303B-1H0EMF

Overview

The TC1303B-1H0EMF 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 package. The device operates with an input voltage range of 2.7 V to 5.5 V and features a typical total quiescent current of 65 µA. The buck converter utilizes a fixed 2.0 MHz switching frequency with automatic transition from PWM to PFM modes for optimized efficiency across load conditions. The LDO output provides independent shutdown capability, and the component includes a power-good output signal with a 300 ms delay. Both regulators are internally compensated and housed in a 10-pin DFN package measuring 3 mm x 3 mm.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO linear regulator in a single compact package
• Features automatic transition between pulse width modulation and pulse frequency modulation modes for enhanced light-load efficiency
• Provides independent shutdown control for both the buck and LDO outputs to manage power consumption
• Includes a power-good output indicator with a specified 300 ms delay for system monitoring

Applications

• Portable battery-powered electronic devices requiring efficient dual-rail power distribution
• Embedded systems utilizing microcontrollers or application processors with distinct core and I/O voltage requirements
• Industrial control modules operating within standard automotive or industrial temperature ranges
• Wireless communication equipment needing low-noise power supplies for sensitive RF sections

Procurement Notes

Verify that the specific suffix '1H0' corresponds to the required fixed output voltage configuration as defined in the official Microchip datasheet. Confirm the package type matches the design footprint, noting variations such as DFN or HVSON exist within the family. Ensure compliance with RoHS and REACH standards if required by the target market regulations. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a compact solution is needed to generate two separate regulated voltages from a single input source. The internal compensation simplifies design by reducing external component count compared to non-compensated alternatives. Consider the 2.0 MHz switching frequency for balancing electromagnetic interference filtering requirements against passive component size. Verify that the combined thermal dissipation of both regulators fits within the available PCB copper area for the chosen package.

Part Context

This part belongs to the TC1303 series, which offers various configurations of synchronous buck and LDO regulators. The TC1303B variant specifically includes a power-good output feature not present in all family members. Different suffixes indicate variations in output voltage settings and packaging options. This series is designed to replace discrete regulator solutions, saving board space and assembly time in portable electronics.

Replacement Considerations

TC1303B-1H0EMFTR