SCT SCT82A30DHKR

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 from power dissipated in the internal VCC LDO even with 5V output voltage. The SCT82A30 features additional features for flexible and robust design including a configurable soft start, an open-drain power-good monitor for fault reporting and output monitoring, monotonic start-up into pre-biased loads, integrated VCC bias supply regulator and bootstrap diode, external power supply tracking, precision enable input with hysteresis for adjustable line under voltage lockout (UVLO), hiccup-mode overload protection, and thermal shutdown protection with automatic recovery. The device is available in a low-profile package QFN20L 3.5mmx4.5mm with enhanced thermal power pad.

• Synchronous DCDC Buck Controller
• 5.5V - 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 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

• High Current Distributed Power Systems
• Telecom, Datacom
• Non-isolated PoE and IP Camera
• Industrial Motor Control
• High Power Automotive DCDC