TC1303B-AD0EMF

Overview

The TC1303B-AD0EMF 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 utilizes a DFN-10 package measuring 3 mm x 3 mm with a height of 0.9 mm. The device incorporates current-mode control with pulse width modulation (PWM) technology, supporting a maximum switching frequency of 2400 kHz. Key electrical characteristics include a typical quiescent current of 65 µA and automatic transition from PWM to pulse frequency modulation (PFM) modes for optimized efficiency under varying load conditions.

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 configurable delay to indicate stable regulation status

Applications

• Portable battery-powered consumer electronics requiring efficient dual-rail power distribution
• Embedded systems utilizing microcontrollers that require separate logic and analog supply rails
• Industrial control modules needing reliable voltage regulation within a limited board space

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact fixed output voltage configuration, as variations exist within the TC1303B series. Ensure compatibility with the required thermal dissipation capabilities of the DFN-10 package for your specific PCB layout. Confirm RoHS compliance and lead-free status requirements align with your manufacturing standards before finalizing procurement orders.

Selection Notes

Select this component when a design requires simultaneous generation of two distinct regulated voltages from a single input source. It is suitable for applications prioritizing high efficiency in the buck stage while maintaining low noise performance in the LDO stage. Consider the internal compensation features which simplify external component selection compared to non-compensated alternatives.

Part Context

This part belongs to the TC1303 family of dual-output regulators, designed to replace discrete regulator solutions in space-constrained designs. The TC1303B variant specifically denotes the version with defined output voltage configurations. It shares architectural similarities with the TC1303A and TC1303C models but differs in pinout or output settings depending on the specific suffix.

Replacement Considerations

Direct replacements may include other parts from the TC1303 family such as TC1303A or TC1303C variants, provided the output voltage specifications match the application requirements. Verify pin-to-pin compatibility and ensure the replacement part supports the same input voltage range and current capabilities.