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Product Folder Links: SCT2331
SILICON CONTENT
TECHNOLOGY
3.8V-32V Vin, 3A Synchronous Step-down DCDC Converter with EMI Reduction
FEATURES
EMI Reduction with Switching Node Ringing-free
400kHz Switching Frequency
Force Pulse Width Modulation (FPWM) Mode
3.8V-32V Wide Input Voltage Range
Up to 3A Continuous Output Load Current
0.8V ±1% Feedback Reference Voltage
Fully Integrated 80mΩ R
dson
High Side MOSFET
and 42mΩ R
dson
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
DESCRIPTION
The SCT2331 is a 3A synchronous buck converter with
up to 32V wide input voltage range, which fully
integrates an 80mΩ high-side MOSFET and a 42mΩ
low-side MOSFET to provide high efficiency step-down
DCDC conversion. The SCT2331 adopts peak current
mode control with the integrated compensation
network, which makes SCT2331 easily to be used by
minimizing the off-chip component count. The
SCT2331 supports Force Pulse Width Modulation
(FPWM) Mode to achieve the small output ripple at light
load condition.
The SCT2331 is an Electromagnetic Interference (EMI)
friendly buck converter with implementing optimized
design for EMI reduction. The converter has proprietary
designed gate driver scheme to resist switching node
ringing without sacrificing MOSFET turn-on and turn-off
time, which erases high frequency radiation EMI noise
caused by the MOSFETs hard switching.
The SCT2331 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.
TYPICAL APPLICATION
FB
EN
VIN GND
SW
BST
OFF
ON
C3
L1
VIN
VOUT
C1
C2
R1
R2
R3
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1,000 10,000
Efficiency (%)
Output Current (mA)
12VIN,3.3VOUT
12VIN, 5VOUT
24VIN, 3.3VOUT
24VIN, 5VOUT