• Step-up controller configuration
• Bootstrap configuration

The S-19990 Series is the industry’s lowest* operation voltage of 3.0V for a 36V operation step-up switching regulator controller.
Electric door latches with emergency backup battery and e-calls are designed to continue operation for a certain period of time after a traffic accident. The S-19990 Series can boost voltage even with low-voltage capacitors/batteries, making the emergency backup battery more compact and reducing costs.

The bootstrap configuration that supplies power for the internal circuit from V_OUT, can boost input voltage with less than 3.0V after startup. It can be used for flyback configuration.
*Based on our research as of March 2024.

• Step-up controller configuration
• Bootstrap configuration

The S-19990 Series is the industry’s lowest* operation voltage of 3.0V for a 36V operation step-up switching regulator controller.
Electric door latches with emergency backup battery and e-calls are designed to continue operation for a certain period of time after a traffic accident. The S-19990 Series can boost voltage even with low-voltage capacitors/batteries, making the emergency backup battery more compact and reducing costs.

The bootstrap configuration that supplies power for the internal circuit from V_OUT, can boost input voltage with less than 3.0V after startup. It can be used for flyback configuration.
*Based on our research as of March 2024.

The S-19999 Series is a start-stop step-up switching regulator controller that monitors the output voltage and automatically controls step-up operation. It operates in sleep mode when the output voltage is higher than the wake-up voltage, and step-up operation is triggered when the output voltage drops below the wake-up voltage.

A feedback resistor is also integrated into the S-19999 Series. In sleep mode, the current consumption is reduced to 60µA by blocking the current of the feedback resistor, thus contributing to reduced standby current in cranking countermeasure circuits.
The S-19999 Series also enables boosting of input voltage with less than 3.0V after startup.

The S-19990/9 Series comes with a built-in spread spectrum clock generation circuit to reduce conducted emission and radiated emission, which enables reduced EMI in the system, reducing noise to about 0.38 times.

A 36V operation step-up switching regulator controller housed in the industry’s smallest* HSNT-8(2030) package (3.0 × 2.0 × t0.5 (max.) mm). Additionally, the oscillation frequency of 2.2MHz can be selected, which enables the use of small external components.
The HTMSOP-8 package (4.0 × 2.9 × t0.8 (max.) mm), a gull-wing type with ease of mounting, is also available for the S-19990/9 Series.
*Based on our research as of March 2024.