LTC1735CS#PBF

LTC1735CS#PBF is a high efficiency synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using a fixed frequency architecture. Burst Mode™ operation provides high efficiency at low load currents. This precision 0.8V reference is compatible with future generation microprocessors. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. This operating frequency (synchronizable up to 500KHz) is set by an external capacitor allowing maximum flexibility in optimizing efficiency. A forced continuous control pin reduces noise and RF interference and can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded.

• Soft-start is provided by an external capacitor that can be used to properly sequence supplies
• Operating current level is user-programmable via an external current sense resistor
• Internal foldback current limiting, output overvoltage crowbar and optional short-circuit shutdown
• Dual N-channel MOSFET synchronous drive, very low dropout operation of 99% duty cycle
• ±1% output voltage accuracy, wide VIN range from 4V to 36V operation
• Internal current foldback, output over voltage crowbar protection
• Latched short-circuit shutdown timer with defeat option
• Forced continuous control pin, remote output voltage sense
• Logic controlled micropower shutdown of IQ <lt/>25µA, pin compatible with minor component changes

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