LT1370 Datasheet | Linear Technology

LT1370 500k Hz High Efficiency 6A Switching Regulator Features s s s s s s s s s s DESCRIPTION The LT ®1370 is a monolithic high frequency current mode switching regulator. It can be operated in all standard switching configurations including boost, buck, flyback, forward, inverting and “Cuk.” A 6A high efficiency switch is included on the die, along with all oscillator, control and protection circuitry. The LT1370 typically consumes only 4.5m A quiescent current and has higher efficiency than previous parts. High frequency switching allows for very small inductors to be used. New design techniques increase flexibility and maintain ease of use. Switching is easily synchronized to an external logic level source. A logic low on the Shutdown pin reduces supply current to 12µA. Unique error amplifier circuitry can regulate positive or negative output voltage while maintaining simple frequency pensation techniques. Nonlinear error amplifier transconductance reduces output overshoot on start-up or overload recovery. Oscillator frequency shifting protects external ponents during overload conditions. , LTC and LT are registered trademarks of Linear Technology Corporation. Faster Switching with Increased Efficiency Uses Small Inductors: 4.7µH All Surface Mount ponents Low Minimum Supply Voltage: 2.7V Quiescent Current: 4.5m A Typ Current Limited Power Switch: 6A Regulates Positive or Negative Outputs Shutdown Supply Current: 12µA Typ Easy External Synchronization Switch Resistance: 0.065Ω Typ U APPLICATIONS s s s s Boost Regulators Laptop puter Supplies Multiple Output Flyback Supplies Inverting Supplies TYPICAL APPLICATION 5V to 12V Boost Converter 5V L1- D1 MBRD835L VOUT† 12V EFFICIENCY (%) 90 88 86 84 82 80 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 LOAD CURRENT (A) - TA02 VIN OFF ON S/S LT1370 VSW R1 53.6k 1% + C1- - 22µF 25V FB GND C2 0.047µF R3 2k VC + R2 6.19k 1% C3 0.0047µF - TA01 C4- - 22µF 25V ×2 - COILTRONICS UP2-4R7 (4.7µH)...