LT3686 Datasheet | Linear Technology

LT3686 37V/1.2A Step-Down Regulator in 3mm × 3mm DFN Features - DESCRIPTION The LT®3686 is a current mode PWM step-down DC/DC converter with an internal 1.2A power switch, packaged in 10-lead 3mm × 3mm DFN. The wide input range of 3.6V to 37V makes the LT3686 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 LT3686 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 LT3686 at full switching frequency at light loads, resulting in low, predictable output ripple above the audio and AM bands. Internal pensation and an internal boost diode reduce external ponent count. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. - - - - - - - - - - Wide Input Range: Operation from 3.6V to 37V Overvoltage Lockout Protects Circuit Through 55V Transients Low Minimum On-Time: Converts 16VIN to 3.3VOUT at 2MHz 1.2A Output Current Adjustable Frequency: 300k Hz to 2.5MHz, With ±5% Accuracy Constant Switching Frequency at Light Loads Tracking & Soft Start Precision UVLO Short-Circuit Robust IQ in Shutdown <1μA Internally pensated 10-Lead 3mm × 3mm DFN Package APPLICATIONS Automotive Systems Battery-Powered Equipment - Wall Transformer Regulation - Distributed Supply Regulation .. - - TYPICAL APPLICATION 3.3V Step-Down Converter 90 VIN 6V TO 37V 2.2μF VIN EN/UVLO LT3686 MODE SS DA 10n F RT GND 15.4k FB...