TC1303C-ZS0EMFTR

Overview

The TC1303C-ZS0EMFTR is a dual-output power management IC from 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. The device integrates a Power-Good (PG) monitor with a 300 ms delay for system supervision. Both outputs are internally compensated, and the buck converter supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed settings. The total quiescent current is typically 65 µA. It utilizes pulse-width modulation (PWM) control with automatic transition to pulse-frequency modulation (PFM) at light loads.

Feature Summary

• Combines a high-efficiency synchronous buck regulator with a low-noise LDO in a single package
• Includes a Power-Good output signal with a programmable delay for reliable system monitoring
• Supports independent shutdown control for both the buck and LDO outputs to optimize power consumption
• Features automatic transition between PWM and PFM modes to maintain efficiency across varying load conditions

Applications

• Cellular phones and mobile communication devices
• Portable computers and notebook systems
• USB-powered peripheral devices
• Handheld instruments and measurement tools

Procurement Notes

Verify that the suffix 'ZS0' corresponds to the specific fixed output voltage configuration required by the design, as this variant differs from adjustable versions. Confirm the DFN-10 package dimensions and thermal pad requirements match the PCB layout. Ensure the ordering suffix aligns with the tape-and-reel packaging specifications defined in the official datasheet to avoid handling discrepancies during assembly.

Selection Notes

Select this component when a compact solution is needed to generate two distinct regulated rails from a single input source. It is suitable for applications requiring simultaneous high-current switching regulation and low-noise linear regulation. Consider the internal compensation which simplifies external component selection. Verify that the maximum input voltage of 5.5 V accommodates the system supply variations without exceeding limits.

Part Context

This part belongs to the TC1303 family, which integrates dual regulators with a power-good monitor. The 'C' designation indicates the adjustable buck output variant, while the suffix specifies the fixed LDO voltage and package type. It is designed for space-constrained portable electronics where board area and component count are critical constraints.

Replacement Considerations

Direct replacements include other variants within the TC1303 series such as TC1303C-ZA0EMFTR or TC1303C-ZB0EMFTR, provided the fixed output voltage matches the application requirement. Cross-model substitution requires verifying pin compatibility and electrical parameters against the target design specifications.