• Wide Input Voltage Range:

               2.9V to 3.6V if VCC is Connected to IN (RC filter is needed from IN to VCC)

               2.9V to 16V if VCC is Supplied by External Source

               3.6V to 16V if VCC is Supplied by Internal LDO

• Internal 8.6mΩ Power Switch and 2.5mΩ Synchronous Rectifier
• Accurate Feedback Set Point: 0.6V ±1% from -40°C to 125°C
• Differential Remote Sense
• Fast Transient Response
• 600kHz, 800kHz and 1000kHz Operating Frequency
• Selectable Automatic High-efficiency Discontinuous Operating Mode at Light Loads
• Programmable Valley Current Limit
• Reliable Built-in Protections:

      Automatic Recovery for Input Under-voltage (UVLO), Output Under-voltage (UVP)

      and Over-temperature (OTP) Conditions

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

      Hic-cup Mode after 128 Consecutive Cycles Valley Current Limit Protection

      Cycle-by-cycle Reverse Current Limit

• Internal and Adjustable Soft-start to Limits Inrush Current
• Smoothly Startup with Pre-biased V_OUT
• Power Good Output Monitor for Under-voltage and Over-voltage

The SY26190VDQ high-efficiency synchronous step down DC-DC regulator operates over a wide input voltage range of 3.6V to 16V, and can deliver continuous output current up to 20A. The output voltage is adjustable from 0.6V to 5.5V. It integrates an internal 8.6mΩ main switch and a 2.5mΩ synchronous switch with very low RDS(ON) to minimize conduction loss and provide excellent efficiency for a wide range of applications, especially for low output voltages and low duty cycles. The 1.5MHz pseudoconstant switching frequency enables using small external inductor and capacitor values.

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 approximately 100ns while maintaining a near-constant operating frequency over line, load, and output voltage ranges. This control method provides stable operation without complex compensation, even with low-ESR ceramic output capacitors.

The stable internal reference (VREF) provides ±1% accuracy over TJ of -40°C to 125°C, and the differential input sense configuration allows feedback sensing at the most relevant load point. Cycle-by-cycle current limit, input undervoltage lockout, internal soft-start, output undervoltage and overvoltage protection, and thermal shutdown provide safe operation in all operating conditions.