DESCRIPTION
The LT®3467/LT3467A switching regulators combine a 42V, 1.1A switch with a soft-start function. Pin compatible with the LT1930, its low VCESAT bipolar switch enables the device to deliver high current outputs in a small footprint. The LT3467 switches at 1.3MHz, allowing the use of tiny, low cost and low height inductors and capacitors. The LT3467A switches at 2.1MHz, allowing the use of even smaller components. High inrush current at start-up is eliminated using the programmable soft-start function. A single external capacitor sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to fi lter.

FEATURES
■ 1.3MHz Switching Frequency (LT3467)
■ 2.1MHz Switching Frequency (LT3467A)
■ Low VCESAT Switch: 330mV at 1.1A
■ High Output Voltage: Up to 40V
■ Wide Input Range: 2.4V to 16V
■ Dedicated Soft-Start Pin
■ 5V at 540mA from 3.3V Input (LT3467)
■ 5V at 430mA from 3.3V Input (LT3467A)
■ 12V at 270mA from 5V Input (LT3467)
■ 12V at 260mA from 5V Input (LT3467A)
■ Uses Small Surface Mount Components
■ Low Shutdown Current: <1μA
■ Pin-for-Pin Compatible with the LT1930 and LT1613
■ Low Profi le (1mm) ThinSOT™ Package
■ Low Profi le (0.75mm) 8-Lead (3mm × 2mm) DFN Package

APPLICATIONS
■ Digital Cameras
■ White LED Power Supplies
■ Cellular Phones
■ Medical Diagnostic Equipment
■ Local 5V or 12V Supplies
■ TFT-LCD Bias Supplies
■ xDSL Power Supplies