LT3686AIDD#PBF

LT3686A is a current mode PWM step-down DC/DC converter with an internal power switch. The wide input range of 3.6V to 37V makes the device suitable for regulating power from a wide variety of sources, including 24V industrial supplies and automotive batteries. Its high maximum frequency allows the use of tiny inductors and capacitors, resulting in a very small solution. Operating frequency above the AM band avoids interfering with radio reception, making the device particularly suitable for automotive applications. Cycle-by-cycle current limit, thermal shutdown and DA current sense provide protection against fault conditions. Soft-start and frequency foldback eliminate input current surge during start-up. Internal compensation and an internal boost diode reduce external component count. It is used in application such as automotive systems, battery-powered equipment, wall transformer regulation, distributed supply regulation etc.

• Overvoltage lockout protects circuit through 60V transients
• 1.2A output current, feedback voltage is 0.8V typ at (VIN = 3.6V ↔ 37V, TA = 25°C)
• Constant switching frequency at light loads
• Tracking and soft-start, precision UVLO
• Short-circuit robust, internally compensated
• Quiescent current is 1.1mA typ at (TA = 25°C, VIN = 10V)
• Quiescent current at shutdown is 1µA max at (VEN/UVLO <lt/> 0.4V, TA = 25°C)
• Switching frequency is 2.1MHz typ at (RT = 15.4Kohm, IDA <lt/> 1.2A, TA = 25°C)
• Operating temperature is -40°C to 125°C
• Package style is 10-lead plastic DFN

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