LM3489MMX

• Easy-to-use control methods
• There is no control loop compensation requirement
• 4.5V wide input range to 35V
• 1. Adjustable output range from 239V to V IN
• High efficiency 93%
• ± 1.3% (± 2% or more temperature) internal reference
• 100% duty cycle work
• The maximum operating frequency > 1MHz
• Current limit protection
• Dedicated boot pin (if not connected)
• The shutdown mode absorbs only 7μA of current
• MSOP - 8
• The LM3489 is AEC - Q100 Level 1 qualified

illustrate

The LM3489 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop small, cost-effective, swap buck regulators for a wide range of applications. Hysteresis control architecture for the stability of the control loop without any use of external components, a wide variety of attention to simple design. The PFET architecture also allows for low component counts, as well as ultra-low dropout 100% duty cycle operation. Another benefit is high efficiency at light loads, eliminating the need to increase the output ripple of the operation. A dedicated enable pin provides a shutdown mode diagram of only 7μA. Leaving the Enable Pin Dover defaults to on.

Current limit protection allows the voltage of the R DS(ON) of the measured PFET to be realized, thus eliminating the need for detection resistance. Detection resistors can be used to improve existing limitations if required accuracy. At cycle-by-cycle current limit, one resistor is adjustable to ensure safe operation within the output current range.

apply

• Stb
• DSL/cable modem
• PC / IA
• Automatic computer
• LCD
• Battery-powered portable applications
• Distributed power systems
• Always on the power supply
• High-power LED drivers
• Car