Микросхема LT3685EMSE#PBF, DC-DC преобразователь, понижающий …

Характеристики

LT3685EMSE#PBF, DC-DC преобразователь, понижающий …The LT3685EMSE#PBF is an Adjustable 2.4MHz Step-Down Monolithic Switching Regulator accepts input voltages up to 38V operating and 60V maximum. An internal overvoltage protection circuit turns off the power switch when VIN is above 38V typical (36V minimum) which then allows the part to safely withstand 60V transients. A high efficiency 0.25 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. The LT3685’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode 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 86% of the programmed output voltage.

• Overvoltage lockout protects circuit through 60V transients
• 200kHz to 2.4MHz Adjustable switching frequency
• Low shutdown current (IQ < 1µA) • Integrated boost diode • Synchronizable between 250kHz to 2MHz • Power good flag • Saturating switch design (0.25R on-resistance) • 0.790V Feedback reference voltage • Soft-start capability