LT3433IFE#PBF

LT®3433 is an automatic high-voltage DC/DC converter provides both step-up and step-down regulation using a single inductor. The IC operates over a 4V to 60V input voltage range making it suitable for use in various wide input voltage range applications such as automotive electronics that must withstand both load dump and cold crank conditions. Internal control circuitry monitors system conditions and converts from single switch buck operation to dual switch bridged operation when required, seamlessly changing between step-down and step-up voltage conversion. Optional Burst Mode® operation reduces no-load quiescent current to 100µA and maintains high efficiencies with light loads. Application includes 12V automotive systems, wall adapter powered systems, battery power voltage buffering.

• Uses a single inductor, dual internal 500mA switches
• Low current shutdown, boosted supply pin to saturate high side switch
• Frequency foldback protection, current limit foldback protection
• Current limit unaffected by duty cycle
• Operating voltage range from 3.3 to 20V (TA = 25°C, VBST – VSW-H)
• Typical burst mode operation is 100µA (VVC <lt/> 0.6V, TA = 25°C)
• Typical soft-start output current is 5µA (TA = 25°C)
• Operating frequency range from 185 to 215KHz (VFB <gt/> 1V, TA = 25°C)
• 16-lead plastic TSSOP package
• Operating temperature range from -40°C to 125°C

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