LT3975EMSE#PBF

LT3975 is an adjustable frequency monolithic buck switching regulator. Low quiescent current design consumes only 2.7µA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. It can supply upto 2.5A of load current and has current limit foldback to limit power dissipation during short circuit. A low dropout voltage of 500mV is maintained when the input voltage drops below the programmed output voltage, such as during automotive cold crank. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 75Mohm switch is included on the die along with a boost schottky diode and the necessary oscillator, control, and logic circuitry. It is used in applications such as automotive battery regulation, portable products, industrial supplies etc.

• Output ripple is 15mVP-P
• Wide input voltage range from 4.3V to 42V
• Excellent start-up and dropout performance
• Switching frequency is 2.25MHz typ at (RT = 11.8K, TA = 25°C)
• Accurate programmable undervoltage lockout
• Low shutdown current is 700nA
• Power good flag, soft-start capability
• Thermal shutdown protection, current limit foldback with soft-start override
• Operating junction temperature is -40°C to 125°C
• Package style is 16-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