DESCRIPTION
The LT®3471 dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability. The low VCESAT bipolar switches enable the device to deliver high current outputs in a small footprint. The LT3471 switches at 1.2MHz, allowing the use of tiny, low cost and low profile inductors and capacitors. High inrush current at start-up is eliminated using the programmable soft-start function, where an external RC sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to filter.

FEATURES
■ 1.2MHz Switching Frequency
■ Low VCESAT Switches: 330mV at 1.3A
■ High Output Voltage: Up to 40V
■ Wide Input Range: 2.4V to 16V
■ Inverting Capability
■ 5V at 630mA from 3.3V Input
■ 12V at 320mA from 5V Input
■ –12V at 200mA from 5V Input
■ Uses Tiny Surface Mount Components
■ Low Shutdown Current: <1µA
■ Low Profile (0.75mm) 10-Lead 3mm × 3mm DFN Package

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