LT1611CS5#TRPBF

LT1611CS5#TRPBF is the industry’s first inverting current mode DC/DC converter. Intended for use in small, low-power applications, it operates from an input voltage as low as 1.1V and switches at 1.4MHz, allowing the use of tiny, low-cost capacitors and inductors 2mm or less in height. Its small size and high switching frequency enable the complete DC/DC converter function to consume less than 0.25 square inches of PC board area. Capable of generating -5V at 150mA from a 5V supply or -5V at 100mA from a 3V supply, the LT1611 replaces nonregulated “charge pump” solutions in many applications. The LT1611 operates in a dual inductor inverting topology which filters the input side as well as the output side of the DC/DC converter. Fixed frequency switching ensures a clean output free from low frequency noise typically present with charge pump solutions. Applications include MR head bias, digital camera CCD bias, LCD bias, GaAs FET bias, positive-to-negative conversion.

• Better regulation than a charge pump, uses tiny capacitors and inductors
• Internally compensated, feedback voltage is -1.23V typical
• Quiescent current is 3mA typical at (active-low VSHDN = 1.5V, not switching)
• Quiescent current in shutdown is 0.01µA typical at (active-low VSHDN = 0V, VIN = 2V, TA = 25°C)
• Switching frequency is 1.4MHz typical
• Switch current limit is 800mA typical at (TA = 25°C)
• Switch VCESAT is 300mV typical at (ISW = 300mA, TA = 25°C)
• Switch leakage current is 0.01µA typical at (VSW = 5V, TA = 25°C)
• Operating temperature range from 0°C to 70°C
• 5-lead plastic SOT-23 package

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