·       Wide Input Voltage Range: 4.5-17V

·       Internal 9.8mΩ Power Switch and 4.5mΩ Synchronous Rectifier

·       Accurate Feedback Set Point: 0.6V ±1%

·       Fast Transient Response

·       Selectable 400kHz, 800kHz and 1200kHz Operating Frequency

·       Selectable Automatic High-efficiency Discontinuous Operating Mode at Light Loads

·       Selectable Valley Current Limit

·       Reliable Built-in Protections:

§ Automatic Recovery for Input Under-voltage (UVLO), Output Under-voltage (UVP), Output Over-voltage (OVP) and Over-temperature (OTP) Conditions

§ Cycle-by-cycle Valley and Peak Current Limit (OCP)

§ Cycle-by-cycle Reverse Current Limit

·       Internal, Adjustable Soft-Start Limits Inrush Current

·       Smooth Pre-biased Startup

·       Power Good Output Monitor for Under-voltage and Over-voltage

The SY26147 is a high-efficiency synchronous step-down DC/DC regulator featuring internal power and synchronous rectifier switches capable of delivering 12A of continuous output current over a wide input voltage range, from as low as 4.5V up to 17V. The output voltage is adjustable from 0.6V to 5.5V.

Silergy’s proprietary Instant-PWM™ fast-response, constant-on-time (COT) PWM control method supports high input/output voltage ratios (low duty cycles) and responds to load transients within ~100ns while maintaining a near constant operating frequency over line, load and output voltage ranges. This control method provides stable operation without complex compensation and even with low ESR ceramic output capacitors.

Internal 9.8mΩ power and 4.5mΩ synchronous rectifier switches provide excellent efficiency over a wide range of applications, especially for low output voltages and low duty cycles. 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 SY26147 is available in a compact QFN3.5´3.5-18 package.