TC1303B-VS0EUNTR

Overview

The TC1303B-VS0EUNTR 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 linear regulator (LDO) within a single MSOP-10 package. The device operates with an input voltage range from 2.7 V to 5.5 V, featuring a typical quiescent current of 65 µA. The synchronous buck converter supports a fixed switching frequency of 2.0 MHz under heavy loads and transitions automatically to PFM mode for light loads. It includes internal compensation, independent shutdown controls for both outputs, and a Power-Good output signal with a 300 ms delay.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a compact package
• Features automatic transition between PWM and PFM modes for optimized efficiency
• Includes independent shutdown control for the buck and LDO outputs
• Provides a Power-Good output signal with a specified delay time

Applications

• Portable consumer electronics requiring multiple voltage rails
• USB-powered devices and peripherals
• Battery-operated handheld instruments
• Embedded systems with space-constrained power architectures

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration. The VS0EUNTR designation indicates a particular fixed or adjustable output setting that differs from other variants in the TC1303B series. Ensure compatibility with required input voltage ranges and thermal dissipation requirements for the MSOP-10 package before finalizing procurement specifications.

Selection Notes

Select this component when a design requires two distinct regulated outputs from a single IC footprint. The TC1303B variant offers independent shutdown capabilities not present in all family members. Consider the 2.0 MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives. Verify that the 300 mA LDO current capability meets the load requirements for the secondary rail.

Part Context

This part belongs to the TC1303/TC1304 series of highly integrated power management solutions designed for portable applications. The series combines switching and linear regulation technologies to maximize battery life while maintaining stable voltage levels. The TC1303B specifically denotes a version with independent shutdown pins for the buck and LDO sections, allowing for flexible power sequencing and system control strategies.

Replacement Considerations

Direct substitutes include other TC1303B variants with different output voltage suffixes if the electrical parameters match the design requirements. Cross-reference the pinout and thermal characteristics with the TC1304 series, noting that the TC1304 may have different shutdown configurations. Always validate functional equivalence using the latest manufacturer datasheets.