The OM71641 is an asynchronous buck converter that supports an input voltage range of 4.5V to 60V and delivers 3.5A continuous load current. The device has an operating frequency of 100KHz to 2.5MHz and supports setting the switching frequency through an external clock.
The device achieves high-efficiency operation by integrating a low RDS(ON) MOS internally, and uses the PSM (power-saving mode) to reduce the switching frequency of the IC under light-load conditions, thereby improving light-load efficiency.
The device's undervoltage lockout is internally set to 4.3V and supports customization of the undervoltage lockout threshold through EN pin.
OM71641 utilizes the internal soft-start function to prevent possible overshoot voltage and surge current during startup, achieves fast response of the loop through current control mode, and supports flexible and simple selection of external compensation components.
The device features comprehensive protection features such as overcurrent limit, frequency foldback, input undervoltage lockout, overvoltage protection, and thermal shutdown.
The OM71641 is available in an eSOP8L package and has a rated junction temperature range of -40°C to 150°C.
• Input Voltage Range: 4.5 V to 60 V
• 3.5A Continuous Output Current
• Integrated 95mΩ Power MOSFET
• 100KHZ to 2.5MHz Fixed Switching Frequency
• Synchronizes to External Clock
• Low Dropout at Light Loads
• Power Save Mode and PWM Mode
• Current Mode Control
• Internal Soft-Start
• Adjustable UVLO Voltage
• Short Circuit Protection
• Thermal Shutdown
• eSOP8L Package
• 12V, 24V and 48V Power Systems
• Industrial Automation and Motor Control
FUNCTION
4.5V to 60V Input, 3.5A Output, Non-synchronous Buck Converter
PACKAGE
eSOP8L, 4.9×3.9
