Linear Technology Offers LTC3428 Boost Converter

Linear Technology Corp. (LTC, Milpitas, CA) announced its LTC3428, a two-phase, current-mode, boost converter capable of supplying 2 A at 5 V from a 3.3 V input in a 3 mm x 3 mm DFN package. The input-voltage range of 1.6 V to 4.5 V is suitable for lithium-ion and multi-cell alkaline/nickel-metal hydride applications.

External parts count and size are minimized by a 1 MHz per phase switching frequency and a two-phase design. Two 93 mΩ, 2 A, N-channel MOSFET switches allow the LTC3428 to deliver high efficiency from input voltages as low as 1.6 V. The device also features an active low shutdown pin to reduce supply current to below 1 µA, internal soft-start, anti-ringing control and thermal shutdown.

The LTC3428 is available in a low-profile (0.75 mm) 10-lead (3 mm x 3 mm) DFN package. The LTC3428EDD is available from stock in a 3 mm x 3 mm DFN package. Pricing starts at $3.50 each for 1,000-piece quantities.