LT3495-1 Datasheet | Linear Technology

Features n LT3495/LT3495B/ LT3495-1/LT3495B-1 650m A/350m A Micropower Low Noise Boost Converter with Output Disconnect 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. The parts feature a high performance NPN power switch with a 650m A and 350m A current limit for the LT3495/LT3495B and LT3495-1/LT3495B-1 respectively. The quiescent current is a low 60μA, which is further reduced to 0.1μA in shutdown. The internal disconnect circuitry allows the output voltage to be isolated from the input during shutdown. An auxiliary reference input (CTRL pin) overrides the internal 1.235V feedback reference with any lower value allowing full control of the output voltage during operation. The LT3495 series are available in a tiny 10-lead 3mm × 2mm DFN package. n n n n n n n n 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: 650m A Current Limit (LT3495/B) 350m A Current Limit (LT3495-1/B-1) Integrated Output Disconnect Integrated Output Dimming Wide input range: 2.3V to 16V Wide output range : Up to 40V Integrated feedback resistor Tiny 10-Lead 3mm × 2mm DFN Package APPLICATIONS n n n OLED Power Low Noise Power MP3 Player L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. - Patent pending. .. TYPICAL APPLICATION OLED Power Supply from One...