The HT5920X is a 100V synchronous buck controlleris designed to regulate from a high input voltagesource or from an input rail subject to high voltagetransients, minimizing the need for external surgesuppression components.The HT5920X continues tooperate during input voltage dips as low as 6V, atnearly 100% duty cycle if needed, making it wel!suited for industrial control, robotic, datacom, and RF power amplifier applications
Forced-PWM (FPWM) operation eliminates frequencyvariation to minimize EMl, while a user-selectablediode emulation feature lowers current consumptionat light-load conditions. Cycle-by-cycle over currentprotection is accomplished by measuring the voltagedrop across the low-side MOSFET or by using anoptional current sense resistor. The adjustableswitching frequency as high as 1MHz can besynchronized to an external clock source to eliminatebeat frequencies in noise-sensitive applications.
• Versatile Synchronous Buck DC-DC Controller
• Wide Input Voltage Range of 6 V to 100 V
• Adjustable Output Voltage From 0.8 V to 60 V
• Meets EN55022/ CISPR 22 EM Standards
• Lossless Ros(on) or Shunt Current Sensing
• Switching Frequency From 100 kHz to 1MHz
• SYNCIn and SYNCOut Capability
• 0.8V Reference With +1% Feedback Accuracy
• 7.5V Gate Drivers for Standard VTH MOSFETS
• 30ns Adaptive Dead-Time Control
• 2.3A Source and 3.5A Sink Capability
• Low-Side Soft-Start for Prebiased Start-Up
• Adjustable Soft-Start or Optional VoltageTracking
• Fast Line and Load Transient Response
• Voltage-Mode Control With Line Feed forward
• High Gain-Bandwidth Error Amplifier
• Precision Enable Input and Open-Drain Power
• Good Indicator for Sequencing and Control
• Inherent Protection Features for Robust Design
• Hiccup Mode Over Current Protection
• Input UVLO With Hysteresis
• VCC and Gate Drive UVLO Protection
• Thermal Shutdown Protection With Hysteresis
