The HT1821 is an easy-to-use, non-sync buckconverter, which is integrated with 0.9Ω low RDS_ON high-side power MOSFET.
The HT1821 can provide up to 1A continues output current with advanced COT control for fast response and easeloop compensation. The switching frequency of HT1821 is typically 450kHz,which will help to minimize the solution minimize the solution size and reduce BOM cost.
The HT1821 has 4.5V to 100V input voltage range, which accommodates a variety of step-down applications.
The HT1821 has built-in full protection features,cycle-by-cycle current limit,hiccup mode short-circuit protection,andthermal shutdown in case of excessive power dissipation.
The HT1821 is available in a cost-effective SOT23-6 package.
⚫ Wide Input Range: 4.5V ~ 100V
⚫ Low RDS_ON: 0.9Ω
⚫ 180uA low Quiescent Current
⚫ 3µA Low Current at Off-state
⚫ 450kHz Switching Frequency
⚫ Constant On Time Control for Fast Loop Response
⚫ Special Valley Current Limit for nonsync Buck Short Protection
⚫ Float EN pin for automatically start-up
⚫ Low Drop Out Mode Support 97% Duty Cycle
⚫ Short Circuit Protection with Hiccup Mode
⚫ Over Temperature Protection
⚫ Available in SOT23-6 package
