• Input Voltage Range: 2.8V-6V

• Up to 3A Continuous Output Current

• Low Shutdown Current: 0.7uA

• Low Quiescent operating Current: 65uA

• 0.6V±1.1% Feedback Reference Voltage

• 2.1MHz Switching Frequency

• Integrated 25mΩ High-Side and 20mΩ Low-Side Power MOSFETs

• Adjustable output voltage from 0.6V to 5V

• Active output discharge

• Programmable Soft Start Time

• Power Good Indicator

• Integrated Protection Feature

- Cycle-by-cycle current limit

- Under-voltage Lockout

- HICCUP Over Current Protection

• QFN-8L 1.5mm*2mm Package

• Available in a Wettable Flank Package

The SCT2131Q is a monolithic, step-down switchmode converter with built-in internal 25mΩ High-Side and 20mΩ Low-Side Power MOSFETs. The device achieves 3A of continuous output current from a 2.8V to 6V input voltage range, with excellent load and line regulation. The output voltage can be regulated to as low as 0.6V. The SCT2131Q, adopting the constant-on time (COT) mode control provides fast transient response and eases loop stabilization, greatly simplifies the converter off-chip configuration. The SCT2131Q features programmable soft-start time to avoid large inrush current and output voltage overshoot during startup. The SCT2131Q operates in Pulse Frequency Modulation (PFM) to improve low light load efficiency. The switching frequency is fixed 2.1MHz. It includes full protection features, such as cycle-bycycle current limit and hiccup over current protection, output under-voltage protection, input under-voltage lockout. The SCT2131Q requires a minimal number of external components and is available in a spacesaving QFN-8L 1.5mm*2mm package with Wettable Flank.


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