LTC3873ETS8#TRMPBF

LTC3873 is a constant frequency current mode, boost, flyback or SEPIC DC/DC controller that drives an N-channel power MOSFET in high input and output voltage converter applications. Soft-start can be programmed using an external capacitor. It provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 55μA during micropower start-up. Using a 9.3V internal shunt regulator, this device can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less. It is widely used in applications such as telecom power supplies, 42V and 12V automotive power supplies, portable electronic equipment etc.

• VIN and VOUT limited only by external components
• Adjustable current limit, current sense resistor optional
• Current mode operation for excellent line and load transient response
• Shutdown current is 55μA typ at (VRUN/SS = 0V, TA = 25°C, VCC = 9V)
• Oscillator frequency is 200KHz typ at (TA = 25°C, VCC = 9V)
• Gate drive rise / fall time is ±40ns
• Maximum duty cycle is 78% typ at (TA = 25°C, VCC = 9V)
• Undervoltage lockout threshold is 8.4V typ at (TA = 25°C, VCC = 9V)
• Operating temperature range from -40°C to 85°C
• Package style is 8-lead plastic TSOT-23

注释

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