The AME5142/5142A is a Boost DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive 1 to 6 LEDs in series or multiple strings from a Li-lon cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AME5142/5142A switches at 1.2MHz, allowing the use of tiny external components. The input and output capacitor can be as small as 1mF(or 4.7mF), saving space and cost versus alternative solutions. A low feedback voltage minimizes power loss in the current setting resistor for better efficiency. The AME5142/5142A is available in SOT-26/TSOT-26 & SOT-25/TSOT-25 packages. The only difference between AME5142 and AME5142A is feedback trip point. The AME5142 is 0.15V and AME5142A is 0.104V.