TC1303B-ZP0EUNTR

Overview

The TC1303B-ZP0EUNTR is a dual-output power management IC from 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 and delivers a typical quiescent current of 65 µA. The device includes a power-good output with a 300 ms delay and supports independent shutdown for both outputs. The buck converter offers over 90% efficiency with automatic PWM to PFM mode transition, while the LDO provides adjustable or fixed output voltages.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator and a low-noise LDO in a single compact package
• Provides system status monitoring through a dedicated power-good output signal with configurable delay
• Supports independent control of buck and LDO outputs via separate shutdown pins for flexible power sequencing

Applications

• Portable consumer electronics requiring efficient multi-rail power distribution
• Battery-powered devices needing extended operational life through low quiescent current
• Embedded systems utilizing microcontrollers with multiple voltage domain requirements

Procurement Notes

Verify the specific suffix ZP0EUNTR against official Microchip documentation to confirm pin compatibility and output configuration. Ensure the MSOP-10 package variant matches your PCB footprint design. Cross-reference the datasheet revision history to validate thermal performance characteristics under expected load conditions before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits that require simultaneous regulation of switching and linear rails from a single supply source. Consider the internal compensation features which simplify external component selection. Evaluate the thermal dissipation capabilities of the MSOP-10 package relative to the maximum expected load currents for both the buck and LDO sections.

Part Context

This part belongs to the TC1303 family of dual-output regulators manufactured by Microchip Technology. The series is designed to replace discrete regulator solutions, reducing board space and assembly complexity. It shares functional similarities with other members like the TC1303A and TC1303C, differing primarily in output voltage configurations and package options.

Replacement Considerations

Direct substitutes include TC1303B-PK0EUNTR and TC1303B-SN0EUNTR, which share identical electrical characteristics but may differ in packaging or reel specifications. Verify pin-to-pin compatibility and output voltage settings before substitution.