Description
STLA02 is a boost converter that operates from 2.5 V to 18 V and can provide an output voltage as high as 27 V and can drive up to 6 white LEDs connected in series. The total output current capability is 20 mA at an output voltage of 24 V. The total output power capability is up to 500 mW. The regulation is done by the internal error amplifier which works with the feedback voltage from the sensing resistor connected in high side sensing configuration. The device can be turned on/off by the logic signal connected to the EN pin and this pin is also dedicated for the PWM dimming of the output current. Current mode control of the regulation allows a fast response to a change of the enable pin voltage level. DFN6 (2 x 2 mm)

Features
■ Boost DC-DC converter
■ Drives up to 6 LEDs with a total current up to 20 mA
■ Output power capability up to 500 mW
■ Input voltage range 2.5 V to 18 V
■ Output current control
■ 2.3 MHz switching frequency
■ PWM input for the output current dimming with 300:1 dimming range
■ 350 mA integrated switch
■ Overvoltage protection
■ Chip overtemperature detection and protection
■ Soft-start implemented

Applications
■ PDA and handheld devices
■ Cellular phones
■ MP3 players