LT1931AIS5#TRMPBF

LT1931A is an industry’s highest power inverting SOT-23 current mode DC/DC converter. It includes a 1A integrated switch allowing high current outputs to be generated in a small footprint. These high speeds enable the use of tiny, low cost capacitors and inductors 2mm or less in height. It is capable of generating –5V at 300mA using significantly smaller inductors. It can operate in a dual inductor inverting topology that filters both the input side and output side current. Very low output voltage ripple approaching 1mVP-P can be achieved when ceramic output capacitors are used. Fixed frequency switching ensures a clean output free from low frequency noise typically present with charge pump solutions. The 36V switch allows VIN to VOUT differential of up to 34V. Typical applications are disk drive MR head bias, digital camera CCD bias, LCD bias, GaAs FET bias, local low noise/low impedance negative supply.

• Low impedance output remains within 1% of nominal during large load steps
• Switching frequency is 2.6MHz
• Wide input range from 2.6V to 16V
• Very low noise is 1mVP-P output ripple
• Uses small surface mount components
• Pin-for-pin compatible with the LT1611
• 5-lead plastic TSOT-23 package
• Quiescent current in shutdown is 1µA at active-low VSHDN = 0V, VIN = 3V

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