LTC3422EDD#TRPBF

LTC3422 is a high efficiency, current mode, fixed frequency, step-up DC/DC converter with true output disconnect and inrush current limiting. The part is guaranteed to start up from an input voltage of 1V. The device includes a 0.20 ohm N-channel MOSFET switch and a 0.24ohm P-channel MOSFET synchronous rectifier. The output voltage, switching frequency, soft-start time, Burst Mode threshold and loop compensation are all simply programmed using tiny external passive components. Quiescent current is only 25µA during Burst Mode operation, maximizing battery life in portable applications. The oscillator frequency can be programmed up to 3MHz and can be synchronized to an external clock applied to the SYNC pin. It is widely used in application such as wireless handsets, handheld computers, GPS receivers, MP3 players etc.

• 700mA continuous/1A pulsed output current for Li-Ion to 5V applications
• True output disconnect, inrush current limiting
• Adjustable automatic Burst Mode® operation
• Frequency range is 1MHz typical
• Input voltage range is 0.5V to 4.5V
• 2.25V to 5.25V adjustable output voltage
• Guaranteed 1V start-up, programmable soft-start
• Synchronizable oscillator, anti-ringing control, shutdown current is 1µA maximum
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic DFN

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