TC1303B-ZS0EUNTR

Overview

The TC1303B-ZS0EUNTR 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 of 2.7 V to 5.5 V. The synchronous buck converter supports a fixed switching frequency of 2.0 MHz under heavy load conditions and features automatic transition to pulse frequency modulation for improved light-load efficiency. The LDO provides stable output with low quiescent current. Both regulators are internally compensated and include independent shutdown controls.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA low-dropout linear regulator in a compact package
• Features automatic transition from pulse width modulation to pulse frequency modulation for optimized efficiency across varying loads
• Includes a power-good output signal with a specified delay time for system monitoring
• Provides independent shutdown control capabilities for both the buck and LDO outputs

Applications

• Portable consumer electronics requiring multiple voltage rails
• Battery-powered handheld devices
• Embedded systems with space-constrained power architectures
• USB-powered peripheral equipment

Procurement Notes

Verify the specific suffix ZS0 against official Microchip documentation to confirm the exact output voltage configuration, as this alphanumeric code defines the fixed or adjustable parameters. Ensure the MSOP-10 package variant matches the design footprint requirements. Confirm RoHS compliance status through the manufacturer's latest datasheet revision notes before finalizing procurement specifications.

Selection Notes

Select this component when a single-chip solution is required to generate two distinct regulated voltages from a single input source. The internal compensation simplifies external component selection compared to non-compensated alternatives. Consider the 2.0 MHz switching frequency for applications where electromagnetic interference filtering needs to be managed at higher frequencies to reduce passive component sizes.

Part Context

This part belongs to the TC1303 series of power management ICs designed for portable applications. The series combines switching regulation with linear regulation to balance efficiency and noise performance. The TC1303B variant specifically includes the power-good monitoring feature, distinguishing it from basic dual-regulator models that lack system status indication capabilities.

Replacement Considerations

TC1303A-MB0EUNTR

FAQ

Does the TC1303B support independent shutdown of its output stages?

Yes, the device provides independent shutdown control for both the synchronous buck regulator and the low-dropout regulator outputs.

What is the typical quiescent current consumption of the TC1303B?

The total device quiescent current is typically 65 µA.