The LT3471EDD dual switching regulator combines two 42V, 1.3A switches with error amplifi ers 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 profi le 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.
The LT3471EDD switches are rated at 42V, making the device ideal for boost converters up to ±40V as well as SEPIC and fl yback designs. Each channel can generate 5V at up to 630mA from a 3.3V supply, or 5V at 510mA from four alkaline cells in a SEPIC design. The device can be confi gured as two boosts, a boost and inverter or two inverters.
The LLT3471EDD is available in a low profi le (0.75mm) 10-lead 3mm × 3mm DFN package.
