• Wide Input Voltage Range: 

          -- 2.85V to 16V if VCC is Supplied by External Source

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

• Internal 22.1mΩ Power Switch and 8.1mΩ Synchronous Rectifier
• ±1% Reference Voltage Over -40°C to +125°C Junction Temperature Range
• Instant-PWM™ Provides Fast Transient Response
• 660kHz,1100kHz and 2200 kHz Operating Frequency
• Selectable PFM/FCCM Operation
• Programmable Valley Current Limit
• Reliable Built-in Protections:

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

          -- Cycle-by-cycle Reverse Current Limit if FCCM is Selected 

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

          -- Hic-cup Mode after 32 Consecutive Cycles Valley Current Limit Protection

• Pre-biased Startup
• Power Good Indicator

The SY26105B is a high-efficiency synchronous step-down DC/DC regulator featuring internal power and synchronous rectifier switches capable of delivering 6A of continuous output current over a wide input voltage range, from as low as 2.85V up to 16V.  The output voltage is adjustable from 0.6V to 6V.

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 capacitors.

Internal 22.1mΩ power and 8.1mΩ synchronous rectifier switches provide excellent efficiency over a wide range of applications, especially for low output voltage 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 SY26105B is available in a compact QFN2´3-14 package.