LT3680IDD#PBF

LT3680 is an adjustable frequency monolithic buck switching regulator. A high efficiency 95mohm switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple burst mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, this can further enhance low output current efficiency by drawing bias current from the output when VOUT is above 3V. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. Typical applications are automotive battery regulation, power for portable products, distributed supply regulation, industrial supplies, wall transformer regulation.

• Minimum input voltage is 3.6V at TA = 25°C. VIN = 10V, VRUN/SS = 10V VBOOST = 15V, VBD = 3.3V
• 3.5A maximum output current
• Low ripple (<lt/>15mVP-P) Burst Mode® operation is IQ = 75µA at 12VIN to 3.3VOUT
• Adjustable switching frequency is 200kHz to 2.4MHz
• Low shutdown current is IQ <lt/> 0.5µA
• Integrated boost diode, power good flag
• 0.790V feedback reference voltage
• Thermal protection, soft-start capability
• 10-lead (3mm × 3mm) plastic DFN package
• Temperature rating is –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