LTC Debuts LT3471 Boost and Inverting DC-DC Converter
Linear Technology Corp. (LTC, Milpitas, CA) announced its new LT3471, a dual-channel (boost/inverter), 1.3 A, 1.2 MHz dc-dc converter packaged in a 3 mm x 3 mm DFN. It can be configured as a dual boost, a boost/inverter, or a dual inverter, since the output-voltage error amplifiers can sense to ground, providing boost or inverting control capability.
The LT3471 input-voltage range of 2.4 V to 16 V makes it suitable for lithium-ion, multiple-cell alkaline/nickel-metal hydride batteries, as well as 12 V power. The device's low VCESAT bi-polar switches enable it to deliver 42 V high-current outputs from a 9mm² package. The LT3471 switches at 1.2 MHz, allowing the use of low-cost, low-profile inductors and capacitors.
The LT3471 switches are rated at 42 V, making the device suitable for boost converters up to 40 V as well as SEPIC and flyback designs. Each channel can generate 5 V at up to 630 mA from a 3.3 V supply, or 5 V at 360 mA from four alkaline cells in a SEPIC design. The LT3471 is available in a low-profile (0.75 mm), 10-lead, 3 mm x 3 mm DFN package.
The LT3471EDD is available from stock. Pricing starts at $2.80 each for 1,000-piece quantities.
