LT1765EFE-5#PBF

LT1765-5 is a 1.25MHz monolithic buck switching regulator. A high efficiency 3A, 0.09ohm switch is included on the die together with all the control circuitry required to construct a high frequency, current mode switching regulator. Current mode control provides fast transient response and excellent loop stability. New design techniques achieve high efficiency at high switching frequencies over a wide operating voltage range. An operating supply current of 1mA improves efficiency, especially at lower output currents. Maximum switch current remains constant at all duty cycles. Synchronization allows an external logic level signal to increase the internal oscillator into the range of 1.6MHz to 2MHz. High frequency operation allows the reduction of input and output filtering components and permits the use of chip inductors. Typical applications are DSL modems, portable computers, regulated wall adapters, battery-powered systems, distributed power.

• Full cycle-by-cycle current control and thermal shutdown are provided
• Maximum switch current limit range from 3 to 6A
• Uses low profile surface mount components, current mode loop control
• Oscillator frequency range from 1.1 to 1.6MHz (3.3V <lt/> VIN <lt/> 25V, TA=25°C, VIN=15V, VC=0.8V)
• Feedback voltage is 5V (3V <lt/> VIN <lt/> 25V, 0.4V <lt/> VC <lt/> 0.9V, TA=25°C, VIN=15V, VC=0.8V)
• SYNC input frequency range from 1.6 to 2MHz
• Shutdown supply current is 35μA (VSHDN=0V, VIN=25V, VSW=0V)
• VIN undervoltage lockout range from 2.47 to 2.73V (TA=25°C, VIN=15V, VC=0.8V)
• 16-lead plastic TSSOP package
• Temperature rating 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