SCT9320.pdf
No.13029
? 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 SOP-8L Package
The SCT9320 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 stepdown
DCDC conversion. The SCT9320 adopts peak
current mode control with the integrated
compensation network, which makes SCT9320 easily
to be used by minimizing the off-chip component
count. The SCT9320 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 SCT9320 is an Electromagnetic Interference
(EMI) friendly buck converter with implementing
optimized design for EMI reduction. The SCT9320
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 SCT9320 offers output over-voltage protection,
cycle-by-cycle peak current limit, and thermal
shutdown protection. The device is available in a lowprofile
SOP-8L package.
