TC1303B-ZS0EMFTR

Overview

The TC1303B-ZS0EMFTR 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 from 2.7 V to 5.5 V, featuring a nominal input of 3.6 V. The synchronous buck converter utilizes current-mode control with pulse width modulation, supporting a fixed switching frequency of 2.0 MHz under heavy load conditions. It includes automatic transition between PWM and PFM modes for optimized efficiency across varying loads. The LDO output provides a typical quiescent current of 65 µA for the total device. Both regulators are internally compensated, and the buck output voltage is adjustable from 0.8 V to 4.5 V or set to standard fixed values. The component is housed in a 10-lead DFN package measuring 3 mm by 3 mm with a height of 0.9 mm.

Feature Summary

• Dual-output architecture combining a 500 mA synchronous buck regulator with a 300 mA LDO
• Automatic transition between PWM and PFM modes to maintain high efficiency at light loads
• Integrated power-good output signal indicating valid regulation status
• Independent shutdown control capability for both the buck and LDO outputs

Applications

• Portable consumer electronics requiring multiple regulated voltage rails
• Battery-powered devices needing efficient step-down conversion
• Embedded systems utilizing microcontrollers with specific voltage requirements
• Industrial control modules operating within standard voltage ranges

Procurement Notes

Verify the exact suffix code against official Microchip documentation to confirm pinout compatibility and thermal characteristics. Ensure that the ordering information matches the required output voltage configuration and package variant. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability. Check for any specific handling instructions related to moisture sensitivity levels during storage and reflow processes.

Selection Notes

Select this component when a design requires both high-efficiency switching regulation and low-noise linear regulation in a compact footprint. Consider the internal compensation which simplifies external component selection compared to non-compensated alternatives. Evaluate the input voltage range against the system's power source to ensure operation within the 2.7 V to 5.5 V limits. Assess the thermal performance requirements given the small DFN package size and expected load currents.

Part Context

This part belongs to the TC1303 family of dual-output regulators from Microchip Technology. The family shares common features such as synchronous buck topology and integrated LDOs but varies in output configurations, package types, and specific electrical parameters. The TC1303B variant specifically denotes the version with independent shutdown controls and defined output capabilities. Similar parts in the series include the TC1303A and TC1303C, which may offer different fixed output voltages or packaging options.

Replacement Considerations

Direct replacements within the same family include TC1303A and TC1303C variants, provided they match the required output voltage and package type. Verify that substitute parts maintain the same pinout and functional compatibility before integration.