SCT9330.pdf
No.11393
? EMI Reduction with Switching Node Ringing-free
? 400kHz Switching Frequency with 6% Frequency
Spread Spectrum FSS
? Pulse Skipping Mode PSM with 20uA Quiescent
Current in Light Load Condition
? 3.8V-28V Wide Input Voltage Range
? Up to 3A Continuous Output Load Current
? 0.8V ±1% Feedback Reference Voltage
? Fully Integrated 85mΩ Rdson High Side MOSFET
and 48mΩ 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 ESOP-8 Package
The SCT9330 is 3A synchronous buck converters with
up to 28V wide input voltage range, which fully
integrates an 85mΩ high-side MOSFET and a 48mΩ
low-side MOSFET to provide high efficiency step-down
DCDC conversion. The SCT9330 adopts peak current
mode control with the integrated compensation
network, which makes SCT9330 easily to be used by
minimizing the off-chip component count. The
SCT9330 supports the Pulse Skipping Modulation
(PSM) with typical 20uA Ultra-Low Quiescent.
The SCT9330 is an Electromagnetic Interference (EMI)
friendly buck converter with implementing optimized
design for EMI reduction. The SCT9330 features
Frequency Spread Spectrum FSS with ±6% jittering
span of the 400kHz 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 SCT9330 offers output over-voltage protection,
cycle-by-cycle peak current limit, and thermal
shutdown protection. The device is available ESOP-8
package.
