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DESCRIPTION：

 

The SCT9323 is 2A synchronous buck converters with up to 32V wide input voltage range, which fully integrates an 130mΩ high-side MOSFET and a 70mΩ low-side MOSFET to provide high efficiency step-down DC-DC conversion. The SCT9323 adopts peak current mode control with the integrated compensation network, which makes SCT9323 easily to be used by minimizing the off-chip component count. The SCT9323 supports the Pulse Skipping Modulation (PSM) with typical 20uA Ultra-Low Quiescent and achieves more than 80% efficient at 1mA and 85% at 5mA light load conditions. 
The SCT9323 is an Electromagnetic Interference (EMI) friendly buck converter with implementing optimized design for EMI reduction. The SCT9323 features Frequency Spread Spectrum FSS with ±6% jittering span of the 500kHz switching frequency and modulation rate 1/512 of switching frequency to reduce the conducted EMI. The converter has proprietary designed gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off time, which further erases high frequency radiation EMI noise caused by the MOSFETs hard switching.When the converter enters PSM mode, the artificial switching node anti-ringing circuit is specially designed to address the radiation EMI noise in the light load condition.
The SCT9323 offers output over-voltage protection, cycle-by-cycle peak current limit, and thermal shutdown protection. The device is available in a low-profile SOP-8L package.

 

 

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