SGM61230.pdf
No.10801
? Wide 4.5V to 28V Input Voltage Range
? 3A Continuous Output Current
? Integrated 70mΩ/39mΩ Power MOSFETs
? 3μA Shutdown Current
? 30μA Quiescent Current
? 5ms Internal Soft-Start
? Fixed 400kHz Switching Frequency
? PWM and Pulse Skip Modes
? Peak Current Mode Control
? Internal Loop Compensation
? Over-Current Protection for Both MOSFETs
? Output Over-Voltage Protection
? Adjustable Under-Voltage Lockout
? Thermal Shutdown with Auto Recovery
? Available in a Green TSOT-23-6 Package
The SGM61230 is step-down converter with 4.5V to 28V input range and 3A rated output current. It is an easy to use device with power switches and current mode control compensation all integrated in a small 6-pin package. A 5ms soft-start is also included to minimize the inrush current and BOM.
This device features cycle by cycle current limiting, thermal shutdown with auto recovery and output over- voltage protection. The current limiting is implemented for both switches and has foldback feature to prevent overheating (and thermal shutdown) when an output short is detected. Automatic recovery after over-current, output short, overheating or over-voltage faults maintains the system operational with no shutdown.
This converter has a fixed 400kHz switching frequency that minimizes the EMI noise problems. However the actual frequency drops during PSM (pulse skip mode)to maximize efficiency at light load. It also drops in some fault conditions. SGM61230 is available in a Green TSOT-23-6 package and can operates over a wide ambient temperature range of -40℃ to +125℃.
