DESCRIPTION

The LT®3495/LT3495B/LT3495-1/LT3495B-1 are low noise boost converters with integrated power switch, feedback resistor and output disconnect circuitry. The parts control power delivery by varying both the peak inductor current and switch off-time. This novel* control scheme results in low output voltage ripple as well as high efficiency over a wide load range. For the LT3495/LT3495-1, the off-time of the switch is not allowed to exceed a fixed level, guaranteeing the switching frequency stays above the audio band for the entire load range.

FEATURES

■ Low Quiescent Current
60µA in Active Mode
0.1µA in Shutdown Mode
■ Low Noise Control Scheme (Switching Frequency
Always Stays Above Audible Range for LT3495/-1)
■ Integrated Power NPN:
650mA Current Limit (LT3495/B)
350mA Current Limit (LT3495-1/B-1)
■ Integrated Output Disconnect
■ Integrated Output Dimming
■ Wide input range: 2.5V to 16V
■ Wide output range: Up to 40V
■ Integrated feedback resistor
■ Tiny 10-Lead 3mm × 2mm DFN Package

APPLICATIONS

■ OLED Power
■ Low Noise Power
■ MP3 Player