LTC3401EMS#PBF

LTC3401 is a high efficiency, fixed frequency, step-up DC/DC converter that operates from an input voltage below 1V. The device includes a 0.16ohm N-channel MOSFET switch and a 0.18ohm P-channel synchronous rectifier. Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock. An external schottky diode is optional but will slightly improve efficiency. Quiescent current is only 38μA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled. It is used in application such as pagers, handheld instruments, cordless phones, wireless handsets, GPS receivers, battery backup, CCFL backlights etc.

• Switch current rating is 1A
• Frequency accuracy is 2MHz typical at (Rt = 15K)
• Wide input voltage range from 0.5V to 5.5V (operating)
• Quiescent current, (Burst mode operation) is 38μA typical at (VC = 0V, MODE/SYNC = 3.3V)
• 2.6V to 5.5V adjustable output voltage
• Start-up voltage is 0.85V typical
• No external Schottky diode required (VOUT <lt/> 4.3V), synchronizable switching frequency
• Burst mode enable control, antiringing control reduces switching noise, PGOOD output
• OPTI-LOOP® compensation, very low shutdown current is 1μA maximum
• Operating temperature is -40°C to 85°C, package style is 10-lead plastic MSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party