DESCRIPTION
The LT®3684 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum). A high effi ciency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. The LT3684’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum.

FEATURES
■ Wide Input Range: 3.6V to 34V Operating, 36V Maximum
■ 2A Maximum Output Current
■ Adjustable Switching Frequency: 300kHz to 2.8MHz
■ Low Shutdown Current: IQ < 1µA
■ Integrated Boost Diode
■ Power Good Flag
■ Saturating Switch Design: 0.18Ω On-Resistance
■ 1.265V Feedback Reference Voltage
■ Output Voltage: 1.265V to 20V
■ Soft-Start Capability
■ Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages

APPLICATIONS
■ Automotive Battery Regulation
■ Power for Portable Products
■ Distributed Supply Regulation
■ Industrial Supplies
■ Wall Transformer Regulation