SCT82A30.pdf• Synchronous DCDC Buck Controller
6V-100V Wide Input Range
0.8V-60V Adjustable Output Voltage
0.8V±1% Reference Voltage
40ns Minimum tON for low duty ratio
150ns Minimum tOFF for high duty ratio
• 100 KHz to 1.2 MHz Switching Frequency
Clock Synchronization In/Out capability
Selectable Diode Emulation or FPWM
• 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 for
Sequencing and Control
Over Temperature Shutdown Protection
• External VCC Input for Bypassing Internal LDO
• Available in QFN-20L 3.5mmx4.5mm Package
• Versatile synchronous buck DC/DC controller
Wide input voltage range of 6 V to 75 V
0.8-V reference with ±1% feedback accuracy
Adjustable output voltage from 0.8 V to 60 V
40-ns tON(min) for high VIN / VOUT ratio
140-ns tOFF(min) for low dropout
Optimized for CISPR 32 requirements
• Switching frequency from 100 kHz to 1 MHz
SYNC In and SYNC Out capability
Selectable diode emulation or FPWM
• 7.5-V gate drivers for standard VTH MOSFETs
14-ns adaptive dead-time control
2.3-A source and 3.5-A sink capability
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
• Inherent protection features for robust design
Adjustable output voltage soft start
Hiccup-mode overcurrent protection
Input UVLO with hysteresis
VCC and gate-drive UVLO protection
Precision enable input and open-drain PGOOD
indicator for sequencing and control
Thermal shutdown protection with hysteresis
• 20-pin VQFN package with wettable flanks
• Create a custom design using the LM5145 with
WEBENCH® Power Designer
