The HT8902X asynchronous buck converter is designed to regulate over a wide input voltage range, minimizingwe need orexeasure suporession comoonents,A mmum controlable on tme ot unsfacilitates large step down conversion ratios, enabling the direct step down from a 48V nominainput to low-voltage rails for reducedsystem complexity and solution cost.The HT8902X operatesduring input voltage dips as low as 5V,at nearly 100% duty cycle if needed, making it anexcellent choice for wide input supply range industrial and high cell count battery pack applications.
With integrated high side power MOSFET, the HT8902X delivers up to 3A of output current.Aconstant ontime(COT)control architecture provides nearly constant switching freguency withexcellent load and line transient response. Additional features of the HT8902Xinclude ultra low lQandhigh light load efficiency, innovative peak and valley over current protection, integrated VCCbiassupply and bootstrap diode, precision enable and input UVLO,and thermal shutdown protection withautomatic recovery.
• Wide input voltage range of 5V to 100V
• Junction temperature range:-40'C to +150°C
Fixed 3ms internal soft start timer
Peak and valley current limit protection
EN UVLO and themmal shutdown protection
Low minimum on and off times of 100ns/200ns
• 5uA shutdown quiescent current
COT mode control architecture
Integrated 0.325R NFET buck switch supports wideduty cycle range
1.2V internal voltage reference
No loop compensation components
Internal VCC bias regulator and boot diode
Open drain power good indicator
ESOP8 package
