Monolithic Power Systems MP9943

Description

The MP9943 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution to achieve a 3A peak output current with excellent load and line regulation over a wide input supply range. The MP9943 has synchronous mode operation for higher efficiency over the output current load range.

Current-mode operation provides fast transient response and eases loop stabilization.

Full protection features include over-current protection and thermal shutdown.

The MP9943 requires a minimal number of readily-available standard external components, and is available in a space-saving QFN-8 (3mmx3mm) package

Features

• -Wide 4V to 30V Continuous Operating Input Range
• -36V Input Transient Tolerance
• -85mΩ/55mΩ Low RDS(ON) Internal Power MOSFETs
• -High-Efficiency Synchronous Mode Operation
• -410kHz Switching Frequency
• -Synchronizes from 200kHz to 2.2MHz External Clock
• -High Duty Cycle for Automotive Cold-crank
• -Internal Power-Save Mode
• -Internal Soft-Start
• -Power Good Indicator
• -Over Current Protection and Hiccup
• -Thermal Shutdown
• -Output Adjustable from 0.8V
• -Available in an QFN-8 (3mmx3mm) package

Typical applications

• •General Consumer
• Distributed Power Systems
• •Multi-Function Printers (MFP)

More information

• Datasheet
• IC product information