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