TC1303B-ZS0EMF

Overview

The TC1303B-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) 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 utilizes current-mode control and pulse width modulation, supporting a maximum switching frequency of 2400 kHz. It incorporates automatic transition from PWM to PFM modes for efficiency optimization. The component is housed in a 10-pin DFN package measuring 3 mm x 3 mm with a height of 0.9 mm.

Feature Summary

• Dual-output architecture combining a high-current synchronous buck converter with a dedicated LDO regulator
• Integrated power-good output signal providing system status indication with a defined delay period
• Independent shutdown controls allowing separate management of the buck and LDO outputs
• Internally compensated design ensuring stability without external compensation components

Applications

• Portable electronic devices requiring efficient multi-rail power distribution
• Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded applications needing simultaneous regulated logic and analog supply rails
• Space-constrained designs benefiting from compact dual-regulator integration

Procurement Notes

Verify the specific suffix ZS0EMF against official Microchip documentation to confirm the exact output voltage configuration and package variant. Ensure compatibility with RoHS and REACH standards as indicated by the MF suffix. Cross-reference the datasheet revision date to validate technical parameters before finalizing procurement specifications.

Selection Notes

Select this component when a compact solution is required for generating two distinct regulated voltages from a single input source. The internal compensation simplifies layout requirements compared to externally compensated alternatives. Consider the quiescent current and shutdown features if power conservation during idle states is a critical design constraint.

Part Context

This part belongs to the TC1303 family of dual-output regulators, which integrates a synchronous buck converter and an LDO in a single package. The series is designed for applications demanding high efficiency and minimal board space. Variations within the family typically differ by output voltage settings and package options while maintaining core functional similarities.

Replacement Considerations

Consult the official Microchip TC1303A/B/C/D datasheet for confirmed substitute part numbers. Verify that any replacement maintains the same pinout, thermal characteristics, and electrical performance specifications.