GENERAL DEscriptION

The SGM61412 is a high frequency, synchronous Buck converter with integrated switches. It can deliver up to 1.2A to the output over a wide input voltage range of 4.5V to 42V. It is suitable for various industrial applications with high input voltage or for power conditioning from unregulated sources. Moreover, the low 55μA current and ultra-low shutdown current of only 1.2μA make it a suitable choice for battery-powered applications.

SGM61412 features high efficiency over a wide load range achieved by scaling down the switching frequency at light load condition to reduce switching and gate driving losses. Other features include internal compensation, internal monotonic soft-start even with pre-biased output and fast loop response due to the peak-current mode controller. Switching at 1.2MHz, the SGM61412 can prevent EMI noise problems, such as the ones found in AM radio, ADSL and PLC applications.

Protection features include current limit and short-circuit protection, thermal shutdown with auto recovery and output over-voltage protection. Frequency fold-back helps prevent inductor current runaway during startup.

The SGM61412 is available in a Green TSOT-23-6 package. It operates over a wide ambient temperature range of -40℃ to +125℃.

FEATURES

• Wide 4.5V to 42V Input Voltage Range

• Current Output up to 1.2A

• 1.2MHz Switching Frequency

• 0.83V Internal Reference

• SGM61412A: PSM and PWM Mode

• SGM61412B: PFM and PWM Mode

• Low Current: 55μA (TYP)

• Ultra-Low Shutdown Current: 1.2μA (TYP)

• 0.83V to 20V Adjustable Output Voltage

• Internal Compensation and Soft-Start

• Precision Enable Function with UVLO Setting

• Monotonic Startup with Pre-biased Output

• Thermal Shutdown Protection

• Available in a Green TSOT-23-6 Package

• -40℃ to +125℃ Operating Temperature Range

APPLICATIONS

High Voltage Power Conversions

Industrial Power Systems

Distributed Power Systems

Battery Powered Systems