• Input Voltage Range: 2.8V-5.5V

• Up to 2A Peak Output Current

• Low Shutdown Current 0.05uA

• Low Quiescent operating Current: 35uA

• 0.6V ±1% Feedback Reference Voltage

• 2MHz Switching Frequency

• Integrated 80mΩ High-Side and 50mΩ Low-Side Power MOSFETs

• 100% Duty Cycle Mode

• Adjustable output voltage from 0.6V to 5V

• Active output discharge

• 1.5ms Internal Soft-start Time

• Power Good Indicator

• Integrated Protection Feature

- Cycle-by-cycle current limit

- Under-voltage Lockout

- HICCUP Over load Protection

- Thermal Shutdown Protection:160°C

• FCTQFN1.5X2-8L Package with SCT2121FTAR

• FCSOT23-8L Package with SCT2121TTBR

• Available in a Wettable Flank Package

The SCT2121 is a monolithic, step-down switchmode converter with built-in internal power MOSFETs. The device achieves 2A of peak output current from a 2.8V to 5.5V input voltage range, with excellent load and line regulation. The output voltage can be regulated to as low as 0.6V Constant-on-time (COT) control provides fast transient response and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown. The SCT2121 operates in power saving mode, which maintains high efficiency during light load operation. It includes full protection features, such as over current protection, output under-voltage protection, input under-voltage lockout, and thermal shutdown. The SCT2121 requires a minimal number of external components and are available in a space-saving FCTQFN1.5X2-8L and FCSOT23-8L package.

• Automotive Infotainment

• Battery-Powered Devices

• Solid state driver