LM3405
Description
Integrated with a 1A power switch, the LM3405 is a current mode control switching buck regulator designed to provide a simple, high efficiency solution for driving LEDs. With a 0.2V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 550k Hz (LM3405-Y) or 1.6MHz (LM3405-X), allowing small surface mount inductors and capacitors to be used. The LM3405 utilizes current mode control and internal pensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. Additional features include user accessible enable/ dim pin for enabling and PWM dimming of LEDs, thermal shutdown, current limit and over voltage protection.
Features n Thin SOT23-6 package n 4.0V to 20V input voltage range n 550k Hz (LM3405Y) and 1.6MHz (LM3405X) switching frequencies n 300mΩ NMOS switch n 30n A shutdown current n...
