Power Electronics

2-A Step-Up Converter Comes in SOT-23

From Linear Technology, the LTC3426 is a 2-A, 6-V, 1.2-MHz step-up dc-dc converter in a ThinSOT package. Its wide 1.6-V to 4.2-V input voltage range enables the LTC3426 to operate from dual cell Alkaline/NiMH/NiCd batteries or from single cell Li-Ion batteries, delivering outputs up to 5.5 V with efficiencies over 90%. The converter’s constant 1.2-MHz switching frequency allows designers to keep switching noise out of noise-sensitive circuitry and enables the use of tiny capacitors and inductors. The combination of the LTC3426's high efficiency switch and tiny ThinSOT package provides high current boost capability in a very compact form factor, making it suitable for space-constrained applications.

The LTC3426's 100-mΩ switch provides high efficiency at heavy loads. It can generate up to 800 mA of output current at 5 V from a 3.3-V supply. Anti-ringing circuitry reduces EMI concerns by damping the inductor while in discontinuous mode, and internal soft-start eases inrush current concerns. The LTC3426ES6 is available from stock in a ThinSOT package. Pricing starts at $1.75 each for 1,000-piece quantities.

For more information, visit www.linear.com.

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