TC1303B-ZA0EUNTR

Overview

The TC1303B-ZA0EUNTR is a dual-output power management IC from Microchip Technology, featuring a 500 mA synchronous buck regulator and a 300 mA low-dropout (LDO) 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, supporting a switching frequency up to 2400 kHz. It includes automatic transition from PWM to PFM modes for efficiency optimization. The component is housed in a 10-pin MSOP-10 package.

Feature Summary

• Integrates a 500 mA synchronous buck converter and a 300 mA LDO regulator in a single compact package.
• Features independent shutdown controls for both the buck and LDO outputs to manage power consumption.
• Includes a power-good output signal with a specified delay to indicate stable regulation status.
• Supports automatic transition between PWM and PFM modes to maintain high efficiency across varying load conditions.

Applications

• Portable battery-powered consumer electronics requiring efficient dual-rail power distribution
• Embedded systems utilizing microcontrollers that need separate logic and analog supply rails
• Industrial control modules operating within standard 3.3 V or 5 V input environments

Procurement Notes

Verify the specific suffix ZA0EUNTR against official Microchip documentation to confirm pinout compatibility and output voltage configuration. Ensure the ordering information matches the required tape-and-reel packaging specifications. Cross-reference the manufacturer's latest datasheet to validate RoHS compliance and environmental certifications prior to final procurement decisions.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single source without occupying excessive board space. It is suitable for applications needing independent control over power states for different subsystems. Consider the thermal performance of the MSOP-10 package relative to the expected load currents and ambient temperature conditions during operation.

Part Context

This part belongs to the TC1303/TC1304 family of dual-output regulators designed by Microchip Technology. The series is engineered to provide high efficiency and low noise for sensitive analog and digital circuits. Variants within the family differ primarily in output voltage configurations and package types, offering flexibility for various PCB layout constraints and power requirements.

Replacement Considerations

Direct substitutes include other parts from the TC1303A, TC1303C, and TC1304 families, provided they match the required output voltage settings and package footprint. Verify functional equivalence regarding shutdown capabilities and power-good signaling before implementing any alternative components in existing designs.