TC1303B-PF0EMF

Overview

The TC1303B-PF0EMF 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. The device features a total quiescent current of 65 µA typical and includes a power-good output with a 300 ms delay. The synchronous buck converter supports adjustable output voltages from 0.8 V to 4.5 V or standard fixed outputs, utilizing a 2.0 MHz fixed-frequency PWM control mode under heavy loads with automatic transition to PFM mode for efficiency.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck regulator with a dedicated LDO.
• Integrated power-good monitoring signal with a configurable delay timer.
• Automatic transition between pulse width modulation and pulse frequency modulation modes.
• Independent shutdown control capability for both the buck and LDO outputs.

Applications

• Portable battery-powered electronic devices requiring multiple voltage rails
• Embedded systems needing efficient step-down conversion alongside stable analog supply
• Industrial control modules with strict space constraints

Procurement Notes

Verify the specific suffix PF0 against official Microchip documentation to confirm the exact output voltage configuration. Ensure the DFN-10 package dimensions match the target PCB footprint. Confirm RoHS compliance status and lead-free characteristics align with project requirements before finalizing procurement orders.

Selection Notes

Select this component when a compact solution is required for generating two distinct regulated voltages from a single source. The integrated design reduces external component count compared to discrete solutions. Consider the 2.0 MHz switching frequency for minimizing passive component size while maintaining acceptable noise levels for sensitive loads.

Part Context

This part belongs to the TC1303 family of dual-output regulators manufactured by Microchip Technology. The series is designed for applications demanding high efficiency and low standby power consumption in small form factors. The B variant typically denotes specific electrical characteristics or manufacturing revisions within the product line.

Replacement Considerations

Consult official Microchip substitution guides for verified alternatives. Cross-reference pinouts and thermal performance if replacing with similar dual-output regulators from other manufacturers.