SCT2320 3.8V-32V Vin, 2A EMI降低的同步降压DCDC变换器

　　DESCRIPTION

　　The SCT2320 is 2A synchronous buck converters with up to 32V wide input voltage range, which fully integrates a 130mΩ high-side MOSFET and a 70mΩ low-side MOSFET to provide high efficiency step-down DCDC conversion. The SCT2320 adopts peak current mode control with the integrated compensation network, which makes SCT2320 easily to be used by minimizing the off-chip component count. The SCT2320 supports the Pulse Skipping Modulation (PSM) with typical 20uA Ultra-Low Quiescent and achieves more than 80% efficient at 1mA and 88% at 5mA light load conditions.

　　The SCT2320 is an Electromagnetic Interference (EMI) friendly buck converter with implementing optimized design for EMI reduction. The SCT2320 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.

　　The SCT2320 offers output over-voltage protection, cycle-by-cycle peak current limit, and thermal shutdown protection. The device is available in a low-profile TSOT23-6 package.

　　FEATURES

　　EMI Reduction with Switching Node Ringing-free

　　500kHz Switching Frequency with 6% Frequency Spread Spectrum FSS

　　Pulse Skipping Mode PSM with 20uA Quiescent Current in Light Load Condition

　　3.8V-32V Wide Input Voltage Range

　　Up to 2A Continuous Output Load Current

　　0.8V ±1% Feedback Reference Voltage

　　Fully Integrated 130mΩ Rdson High Side MOSFET and 70mΩ Rdson Low Side MOSFET

　　1uA Shut-down Current

　　80ns Minimum On-time

　　Precision Enable Threshold for Programmable UVLO Threshold and Hysteresis

　　Low Dropout Mode Operation

　　4ms Built-in Soft Start Time

　　Output Over Voltage Protection

　　Thermal Shutdown Protection at 160°C

　　Available in TSOT23-6L Package

　　APPLICATIONS

　　White Goods, Home Appliance

　　Surveillance

　　Audio, WiFi Speaker

　　Printer, Charging Station

　　DTV, STB, Monitor/LCD Display