GENERAL DEscriptION

The SGM61181 is an efficient, 8A, synchronous Buck converter with integrated power MOSFETs and a wide 4.5V to 18V input range. This current mode control device is optimized for high density applications with minimal number of external components. High switching frequency, up to 2000kHz, can be chosen to lessen the solution size by smaller inductor and capacitors. This device can be used as a standalone or tracking power supply. The SS/TR pin can be used to control the output voltage startup ramp or as an input for tracking.

Power supply se for two or more power supplies is possible by using the enable input (EN) and the open-drain power good output (PG) signals.

The high-side MOSFET current is cycle-by-cycle limited for overload protection. The low-side MOSFET sourcing current is also limited to prevent current runaway. The low-side switch also has a sinking current limit that turns it off if an excessive reverse current flows through it.

Thermal shutdown protection is activated to prevent damage to the device when the junction temperature is above the shutdown threshold.

The SGM61181 is available in a Green T×3.5-14L package.

FEATURES

• Low Integrated RDSON Switches: 24mΩ/15mΩ

• Split Rails for Supply (VIN) and Power (PVIN)

  1.8V to 18V Range for PVIN

  4.5V to 18V Range for VIN

• 200kHz to 2000kHz Switching Frequency

• External Clock Synchronization

• Voltage Tracking Capability

• 0.8V Internal Reference Voltage

• ±1% Reference Voltage Accuracy

• 3.4μA (TYP) Shutdown Current

• Monotonic Startup with Pre-biased Outputs

• Adjustable Soft-Start Time

• Power Se Capability

• Power Good Output Monitor for Under-Voltage and Over-Voltage Protections

• Adjustable Input Under-Voltage Lockout (UVLO)

• -40℃ to +125℃ Operating Temperature Range

• Available in a Green T×3.5-14L Package

APPLICATIONS

Industrial and Commercial Power Systems

Distributed Power Systems

Server and Storage

Communications E