LM3842 Datasheet - ETC

LM3842 step-down constant current LED driver

The LM3842 is a step-down constant current LED driver. When the input voltage down to lower than LED forward voltage, then LM3842 run into LDO mode. The LM3842 supports a range of input voltages from 2.5V to 6.0V, allowing the use of a single Li+/Li-polymer cell, 3AA or 4AA cell, USB, and other stan.

LM3842 Features

* n n n n n n n n n n n n Efficiency up to 93% 180 μA(TYP.) Quiescent Current Output Current: Up to 1A Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short LED Protection Open LED Protection Thermal Shutdown 5-pin Small SOT23-5 Packages Pb-Free Package Gene

LM3842_ETC.pdf