LT3971IMSE#PBF

LT3971 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V. 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 this, 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. Applications are automotive battery regulation, power for portable products, industrial supplies.

• Ultralow quiescent current is 2.8µA IQ regulating 12VIN to 3.3VOUT
• Low ripple Burst Mode® operation: output ripple <lt/> 15mVP-P
• Minimum input voltage is 4V typical at TA = 25°C. VIN = 12V, VEN = 12V, VBD = 3.3V
• Adjustable switching frequency is 200kHz to 2MHz
• Fast transient response, power good flag
• Accurate 1V enable pin threshold, soft-start capability
• Internal compensation
• Feedback voltage is 1.175 to 1.205V
• 10-lead plastic MSOP package
• Temperature range from –40°C to 125°C

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