• 4V to 36V Input Voltage Range 
• 4A Output Current Capability
• Low RDS(ON) for Internal Switches (Top/Bottom): 41/21mΩ
• Typical 30µA Quiescent Current and 1µA Shutdown Current
• 300kHz to 2.2MHz Switching Frequency
• Synchronizes to External Clock
• Spread Spectrum Function
• Hiccup Mode Output Short-Circuit Protection
• EN ON/OFF Control with Accurate Threshold
• Cycle-by-Cycle Peak Current Limit
• Power Good Indicator
• 1V ± 1% Reference Voltage Over -40˚C to 150˚C Temperature Range 
• QFN3.5mm×4mm-14 Package
• Automotive AEC- Q100 Grade 1  Certificated

The SA24404 is a high-efficiency synchronous step-down DC-DC regulator featuring internal power and synchronous rectifier switches. The device can operate over a wide input voltage range of 4V to 36V and deliver up to 4A of continuous output current. 

The SA24404 is specially designed for EMI requirements. The symmetric QFN package along with the adjustable LX rise time helps the device to achieve good EMI performance. The switching frequency is adjustable from 300 kHz to 2.2MHz, or synchronized to external clock. The frequency can be selected based on customer’s EMI limits and avoid noise important frequency bands.

Internal 41mΩ power and 21mΩ synchronous rectifier switches, frequency reduction at light load conditions, along with an external bias input provide excellent efficiency over a wide range of applications. Furthermore, the 1μA shutdown supply current allows the device to be used in battery powered applications. Cycle-by-cycle current limit, input under-voltage lock-out, internal soft-start, output under- and over-voltage protection, and thermal shutdown provide safe operation in all operating conditions.

The SA24404 is available in a QFN3.5mm×4mm-14 package.