LT3971AIMSE#PBF

LT3971 is an adjustable frequency monolithic buck switching regulator. Low quiescent current design consumes only 2.8μA 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. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 0.33ohm switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. An accurate 1V threshold enable pin can be used to shut down the device, reducing the input supply current to 700nA. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. It is used in applications such as USB VBUS regulation, automotive battery regulation, power for portable products, industrial supplies.

• Wide input voltage range from 4.3V to 38V
• Output voltage range from 1.19V to 30V
• Power good flag, soft-start capability, internal compensation
• Fast transient response, accurate 1V enable pin threshold
• Switch VCESAT is 330mV typical at (ISW = 1A, TA = 25°C, VIN = 12V)
• Switching frequency is 2.25MHz typical at ( RT = 11K, TA = 25°C, VIN = 12V)
• Switch current limit is 2.5A typical at (TA = 25°C, VIN = 12V)
• Operating temperature range from -40°C to 125°C
• Package style is 10-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