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100V同步Buck控制器 SCT82A30 可替代LM5146，LM5145，LM25145，JWH6346

The SCT82A30 is a 100V voltage mode control
synchronous buck controller with line feed forward.
40ns minimum on-time of controlled high side MOSFET
supports high conversion ratio, enabling the direct stepdown conversion from a 48V input to low-voltage rail
reducing system complexity and solution cost. The
device operates at nearly 100% duty cycle if needed
during input voltage drops as low as 6V.
The SCT82A30 support Forced-PWM (FPWM) and
Diode Emulation Mode. FPWM operation eliminates
switching frequency variation to minimize EMI, while
user selectable diode emulation lowers current
consumption at light-load condition. The adjustable
switching frequency as high as 1.2MHz can be
synchronized to an external clock source to eliminate
beat frequencies in noise sensitive applications.
An external voltage or the output of the buck converter
itself source can power internal VCC or EXTVCC
helping to increase overall efficiency and decrease
internal self-heating f

FEATURES
 Synchronous DCDC Buck Controller
5.5V-100V Wide Input Range
0.8V-60V Adjustable Output Voltage
0.8V±1% Reference Voltage
40ns Minimum t

ON
for low duty ratio
150ns Minimum t
OFF
for high duty ratio
 100 KHz to 1.2 MHz Switching Frequency
Clock Synchronization In/Out capability
Selectable Diode Emulation or FPWM
Frequency Spread Spectrum Modulation
 7.5-V Gate Drivers
2.3-A Source and 3.5-A Sink Current
Low-side Soft Start for prebiased Start-up
Fast Line and Load Transient Response
Voltage-mode control with line feedforward
High Gain Bandwidth Error Amplifier
Protection Features for Robustness
Adjustable Soft Start time
Hiccup-mode Overcurrent Protection
Input UVLO with hysteresis
VCC and Gate-drive UVLO Protection
Precision Enable Input Threshold
Open-drain Power Good Indicator
Over Temperature Shutdown Protection
External VCC Input for Bypassing Internal LDO
Available in QFN-20L 3.5mmx4.5mm Package
APPLICATIONS
 High Current Distributed Power Systems
 Telecom, Datacom
 Non-isolated PoE and IP Camera
 Industrial Motor Control
 High Power Automotive DCDC