SA25903BBAT

·       2.8V~6V Input Voltage Range

·       Up to 3A Output Current Capability

·       Low R_DS(ON) for Internal Switches (Top/Bottom): 65mΩ/25mΩ

·       Constant Frequency Peak Current Mode Control

·       35µA Quiescent Current (Typ.)

·       2.5µA Shutdown Current (Typ.)

·       ±1% 0.6V Reference Over -40°C to +150°C

·       2.3MHz Switching Frequency

·       Internal Soft-Start Limits Inrush Current

·       Forced PWM or PFM Operation Selectable in Light Load

·       100% Duty Cycle Dropout Operation

·       Power-Good Indicator

·       Hiccup Mode for Short-Circuit Protection

·       Compact SOT583 Package

·       Automotive AEC-Q100 Grade 1 Qualified

·       MSL Rating: MSL1

The SA25903B is a high-efficiency 2.3MHz synchronous step-down converter that operates over an input voltage range of 2.8V to 6V, and can deliver an output current of up to 3A. It integrates very low R_DS(ON) main and synchronous MOSFETs to minimize conduction loss. The 2.3MHz constant switching frequency reduces the required external inductor and capacitor values. 

The SA25903B utilizes a constant frequency peak current mode control architecture to achieve stable operation across a wide range of conditions. It also provides cycle-by-cycle current limit protection, output short-circuit protection, and overtemperature protection.

The SA25903B is available in a space-saving SOT583 package.