LT3972EDD#TRPBF

LT3972 is an adjustable frequency (200KHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 33V (62V max). A high efficiency 95mohm switch is included on die along with a boost schottky diode and 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, it can further enhance low output current efficiency by drawing bias current from output when VOUT is above 3V. Shutdown reduces input supply current to less than 1μA while a resistor and capacitor on RUN/SS pin provide controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 91% of programmed output voltage. Applications include automotive battery regulation, distributed supply regulation, industrial supplies and wall transformer regulation.

• Wide input range, operation from 3.6V to 33V
• 3.5A maximum output current, overvoltage lockout protects circuits, through 62V transients
• Low ripple (<lt/>15mVP-P) burst mode operation (IQ = 75μA at 12VIN to 3.3VOUT)
• Adjustable switching frequency range from 200KHz to 2.4MHz
• Integrated boost diode, synchronizable between 250KHz to 2MHz
• Power good flag, saturating switch design, 95mohm on-resistance
• Output voltage of 0.79V to 30V, thermal protection, soft-start capability
• Low shutdown current of IQ <lt/> 1μA
• 10-lead plastic DFN package, -40°C to 125°C temperature range

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