Linear Technology Intros LTC3442 DC-DC Converter
Linear Technology Corp. (LTC, Milpitas, CA) announced its LTC3442 buck-boost dc-dc converter, which delivers up to a continuous 1.2 A of output current at efficiencies as high as 95%. The LTC3442 is a synchronous, fixed-frequency, buck-boost dc-dc converter designed to optimize battery run time for single-cell, lithium-ion, multi-cell alkaline or nickel-metal hydride battery-powered applications.
The LTC3442 operates from an input-voltage range of 2.4 V to 5.5 V and can provide a fixed output voltage between 2.4 V to 5.25 V. The LTC3442 has a programmable switching frequency that can be set between 300 kHz and 2 MHz via a single resistor. The synchronous buck-boost topology delivers up to 95% efficiency over the entire lithium-ion battery range. The small implementation footprint makes it suitable for space-constrained environments such as cellular phones, PDAs, wireless and DSL modems and digital cameras.
The LTC3442 uses two 0.10 Ω N-channel and two 0.11 Ω P-channel switches in a constant-frequency, synchronous switching topology to obtain efficiencies as high as 95%. Burst-Mode operation reduces quiescent current to only 35 µA with light loads. Integrated output disconnect in shutdown reduces ISD to less than 1 µA while improving system reliability. The LTC3442 also features anti-ringing control to minimize EMI, soft-start control and thermal shutdown.
The LTC3442 is available from stock in a 4 mm x 3 mm DFN package. Pricing starts at $3.95 each in 1,000-piece quantities.
