TC1303A-ZI0EUNTR

Overview

The TC1303A-ZI0EUNTR 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. The device utilizes current-mode control with pulse width modulation (PWM) at a fixed frequency of 2.0 MHz under heavy loads. It incorporates automatic transition between PWM and PFM modes for optimized efficiency across load conditions. The component is housed in a 10-pin MSOP package.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a low-noise LDO in a single compact package.
• Provides independent shutdown control for both the buck and LDO outputs to manage system power states.
• Includes a power-good output signal with a defined delay to indicate stable regulation status.
• Features internal compensation for both regulators, simplifying external component selection.

Applications

• Portable consumer electronics requiring multiple regulated voltage rails
• Battery-powered devices needing efficient step-down conversion
• Embedded systems utilizing microcontrollers or sensors with distinct voltage requirements

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration. Ensure the ordering part number matches the required package type and temperature rating. Cross-reference the datasheet revision to confirm pinout compatibility and electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when a design requires two isolated regulated outputs from a single input source. It is suitable for applications prioritizing board space reduction through integrated PMIC solutions. Consider the quiescent current and efficiency curves relative to the expected load profile to ensure optimal battery life or thermal performance.

Part Context

This part belongs to the TC1303 family of dual-output regulators. Variants within this series differ primarily by the fixed output voltage settings of the buck and LDO channels. The 'A' designation typically indicates specific voltage configurations compared to other letters in the series. All variants share the same core architecture and package footprint.

Replacement Considerations

Direct replacements include other TC1303A variants with different output voltage suffixes, such as TC1303A-MB0EUNTR or TC1303A-EI3EUNTR, provided the voltage levels match the circuit requirements. Verify that the replacement maintains the same MSOP-10 package and electrical ratings.