DESCRIPTION
The LT®3682 is an adjustable frequency (250kHz to 2.2MHz) monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 0.5Ω switch is included on the device along with a boost diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. A SYNC pin allows the user to synchronize the part to an external clock, and to choose between Low Ripple Burst Mode operation and standard PWM operation.

FEATURES
■ Wide Input Range:
   Operation from 3.6V to 36V
   Overvoltage Lockout Protects Circuits through
   60V Transients
■ 1A Output Current
■ Low Ripple Burst Mode® Operation
   IQ = 75μA at 12VIN to 3.3VOUT
   Output Ripple < 15mVP-P
■ Adjustable Switching Frequency: 250kHz to 2.2MHz
■ Short-Circuit Protected
■ Synchronizable Between 300kHz and 2.2MHz
■ 0.8V Feedback Reference Voltage
■ Output Voltage 0.8V to 20V
■ Soft-Start Capability
■ Power Good Flag
■ Small 12-Pin Thermally Enhanced 3mm × 3mm
   DFN Package

APPLICATIONS
■ Automotive Battery Regulation
■ Automotive Entertainment Systems
■ Industrial Supplies
■ Power for Portable Products
■ Distributed Supply Regulation