TC1303C-PI0EMF

Overview

The TC1303C-PI0EMF is a dual-output power management IC from Microchip Technology, integrating 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, with a nominal rating of 3.6 V. The device features a fixed 2.0 MHz switching frequency for the buck converter and includes a Power-Good output with a 300 ms delay. Total quiescent current is typically 65 µA. Both outputs are internally compensated, and the buck regulator supports automatic transition from PWM to PFM mode for improved light-load efficiency. The component is housed in a 10-pin DFN package measuring 3 mm x 3 mm.

Feature Summary

• Dual-output architecture combining a high-efficiency synchronous buck regulator with a dedicated LDO
• Automatic transition between Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) modes
• Integrated Power-Good signal indicating valid output regulation with programmable delay
• Independent shutdown control capability for both the buck and LDO outputs

Applications

• Portable battery-powered consumer electronics requiring multiple voltage rails
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries
• IoT devices needing efficient power conversion with low standby current consumption
• Mobile communication modules requiring stable voltage supplies for digital logic and RF sections

Procurement Notes

Verify the specific suffix code against official Microchip documentation to confirm the exact output voltage configuration, as variations exist within the TC1303 family. Ensure compatibility with RoHS standards and lead-free manufacturing processes if required by your assembly specifications. Cross-reference the package marking and date codes with authorized distributors to prevent counterfeit components. Confirm thermal performance requirements align with the DFN-10 package capabilities under your intended load conditions.

Selection Notes

Select this component when a compact solution is needed to generate two distinct regulated voltages from a single input source. It is suitable for designs prioritizing space savings over discrete component counts. Consider the internal compensation which simplifies external filter design compared to non-compensated regulators. Evaluate the 300 mA LDO limit to ensure it meets the load requirements of the secondary rail without excessive heat dissipation.

Part Context

This part belongs to the TC1303 series, which also includes variants like TC1303A, TC1303B, and TC1304. These devices share the same core topology but may differ in output voltage settings, package options, or specific feature sets such as independent shutdown availability. The TC1303C variant specifically denotes the version with independent shutdown controls for both outputs, distinguishing it from other family members that might have coupled shutdown mechanisms.

Replacement Considerations

Direct pin-to-pin replacements within the same family include TC1303A, TC1303B, and TC1304, provided the output voltage configurations match the application requirements. Verify that any substitute part maintains the same 2.0 MHz switching frequency and quiescent current characteristics to ensure circuit stability and efficiency remain unchanged.