TC1303B-PI0EUN

Overview

The TC1303B-PI0EUN 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 for the buck section, supporting frequencies up to 2400 kHz. It includes a power-good output with a 300 ms delay and independent shutdown controls for both outputs. The total quiescent current is typically 65 µA. The component is housed in a 10-pin MSOP package.

Feature Summary

• Integrates a 500 mA synchronous buck converter and a 300 mA LDO in a single compact package
• Provides automatic transition between PWM and PFM modes to optimize efficiency across load conditions
• Features independent shutdown capabilities for both the buck and LDO outputs to manage power states
• Includes a power-good signal output with a specified delay time for system monitoring

Applications

• Portable battery-powered electronic devices 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
• Communication equipment requiring low noise and high efficiency power regulation

Procurement Notes

Verify the specific suffix code against the manufacturer's official documentation to confirm the exact output voltage configuration and package variant. Ensure that the ordering information matches the required pinout and thermal specifications for your design. Cross-reference the part number with the latest datasheet revision to confirm compliance with current environmental standards and availability status before finalizing procurement plans.

Selection Notes

Select this component when a design requires two distinct regulated voltages from a single input source without external compensation components. It is suitable for applications prioritizing space savings and simplified bill of materials. Consider the internal compensation and fixed frequency operation if layout complexity needs to be minimized. Evaluate the thermal performance requirements relative to the expected load currents and ambient temperature conditions.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which also includes variants like the TC1303A, TC1303C, and TC1304. These devices share similar architectural features but may differ in output current ratings, fixed voltage options, or package types. The TC1303B specifically denotes the version with defined current capabilities and internal compensation settings. It is designed to compete with other integrated power management solutions offering high efficiency in small form factors.

Replacement Considerations

Direct substitutes include other members of the TC1303 series such as TC1303A, TC1303C, or TC1304, provided the electrical parameters match the application requirements. Verify pin compatibility and output voltage configurations before substitution. Alternative manufacturers' parts require careful evaluation of pinouts, thermal characteristics, and control loop stability.