4.5V to 18V Input, 8A, Synchronous Buck Converter

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The SGM61184 is an efficient 18V, 8A synchronous Buck DC/DC 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 1600kHz, can be chosen to lessen the solution size by smaller inductor and capacitors.

The peak current mode control with fast transient response makes the loop compensation simple. The high-side MOSFET current and low-side MOSFET sourcing current are cycle-by-cycle limited for overload protection. The hiccup mode limits MOSFET power dissipation if short-circuit or overload keeps appearing.

A power good supervisor circuit monitors the regulator output. When the output voltage is in regulation, the PG open-drain output pin will be in high-impedance state. An internal deglitch time prevents this pin from pulling low unless a fault has occurred. The EN pin can be used to adjust the input UVLO and hysteresis by a resistor divider. The soft-start and tracking pin (SS/TRK) can control the output voltage start-up ramp, which makes the device work as a standalone power supply or work in tracking situations.

The SGM61184 is available in a Green TQFN-3.5×3.5-18AL package.

  • 4.5V to 18V Input Voltage Range

  • 0.6V to 12V Output Voltage Range

  • 3.5μA (TYP) Shutdown Current

  • Integrated RDSON Switches: 8.6mΩ and 4.5mΩ

  • 200kHz to 1600kHz Fixed Switching Frequency

  • 0.6V Internal Voltage Reference

  • External Clock Synchronization

  • Peak Current Mode Control with Fast Transient Response

  • Hiccup Mode Current Limit

  • Safe Start-Up with Pre-Biased Outputs

  • Adjustable Soft-Start Time

  • Power Sequencing Capability

  • Adjustable Input Under-Voltage Lockout (UVLO)

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

  • Non-Latch Thermal Shutdown Protection

  • Available in a Green TQFN-3.5×3.5-18AL Package


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Ordering Infomation
Part Number
MSL RatingOperating Temperature RangeMaterial ContentReliability Report
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-40℃ to +150℃

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.

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SG Micro Corp (SGMICRO) specializes in the development, manufacturing and sales of high-performance and high-reliability integrated circuits for analog signal conditioning and system power management, offering innovative solutions to a broad range of applications in the industrial, automotive, communication, computing, consumer electronics, and medical equipment markets.
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