TC1303A-ZS0EMF

Overview

The TC1303A-ZS0EMF 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 and delivers a typical total quiescent current of 65 µA. The device utilizes a 2.0 MHz fixed-frequency PWM control mode for the buck converter, which transitions automatically to PFM mode for improved light-load efficiency. It supports adjustable output voltages from 0.8 V to 4.5 V for the buck section and standard fixed outputs for the LDO. The component includes independent shutdown controls for both outputs and provides a Power-Good signal with a 300 ms delay. It is housed in a 10-pin DFN package measuring 3 mm x 3 mm.

Feature Summary

• Integrates a 500 mA synchronous buck regulator and a 300 mA LDO in a single compact package
• Features automatic transition between PWM and PFM modes to optimize efficiency across load conditions
• Provides independent shutdown functionality for both the buck and LDO outputs
• Includes a Power-Good output indicator with a specified 300 ms delay for system monitoring

Applications

• Portable battery-powered consumer electronics requiring efficient dual-rail power
• Embedded systems needing simultaneous high-current and low-noise supply rails
• Industrial control modules operating within wide input voltage ranges
• IoT devices utilizing space-constrained surface-mount packaging

Procurement Notes

Verify the specific suffix 'ZS0' against official Microchip documentation to confirm the exact output voltage configuration, as this identifier determines whether the device uses adjustable or fixed voltage settings. Ensure compatibility with RoHS standards and check for lead-free compliance before integration. Confirm that the 10-pin DFN-10 package dimensions align with your PCB footprint requirements. Cross-reference the part number with the latest datasheet revision to ensure all electrical parameters match your design specifications.

Selection Notes

Select the TC1303A-ZS0EMF when a design requires two distinct regulated outputs from a single source without external compensation components. This part is suitable for applications demanding high efficiency under heavy loads due to its synchronous buck topology. Consider this component if the system benefits from independent output control and status monitoring via the Power-Good pin. Evaluate the thermal performance of the DFN-10 package relative to the expected current draw to ensure adequate heat dissipation.

Part Context

The TC1303A belongs to the TC1303/TC1304 family of dual-output regulators designed for space-sensitive applications. It complements other Microchip PMIC solutions by offering integrated switching and linear regulation capabilities. The series is characterized by internal compensation and low quiescent current, making it a versatile choice for modern portable electronics where board space and power efficiency are critical constraints.

Replacement Considerations

Direct substitutes within the same family include the TC1303B and TC1303C variants, which share similar architectural features but may differ in specific output configurations or thermal ratings. Verify that any replacement part maintains the 500 mA buck and 300 mA LDO current capabilities and matches the 10-pin DFN package outline.