LT3686IDD#PBF

LT3686 is a current mode PWM step-down DC/DC converter with an internal 1.2A power switch. 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 and DA current sense provide protection against fault conditions. Soft-start and frequency foldback eliminate input current surge during start-up. An optional internal regulated active load at the output via the BD pin keeps the device at full switching frequency at light loads, resulting in low, predictable output ripple above the audio and AM bands. Internal compensation and an internal boost diode reduce external component count. It is widely used in application such as automotive systems, battery-powered equipment, wall transformer regulation, distributed supply regulation etc.

• Wide input voltage range is 3.6V to 37V
• Overvoltage lockout protects circuit through 55V transients
• Tracking and soft-start, precision UVLO
• Short-circuit robust, internally compensated
• Quiescent current is 1.1mA typical at
• Quiescent current at shutdown is 1µA maximum at (VEN/UVLO <lt/> 0.4V)
• Switching frequency is 2.1MHz typical at (RT = 15.4Kohm)
• Minimum on time is 100ns typical, minimum off time is 150ns typical
• Operating junction 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