Linear Technology's LTC3112 is a synchronous buck-boost converter that
delivers up to 2.5A of output current from a wide range of power sources,
including single or multiple cell batteries, super capacitor stacks and wall
adapters. Its 2.7 to 15V input range and 2.5 to 14V output range provides a
regulated output with inputs above, below or equal to the regulated output. The
low noise buck-boost topology incorporated in the LTC3112 provides a continuous, jitter-free transition
between buck and boost modes, making it ideal for RF and other noise-sensitive
applications that must maintain a low-noise constant output voltage with a
variable input power source. In many applications, battery run time is
significantly extended over step-down only solutions. The LTC3112's default 750kHz switching frequency, that can be
synchronized to an external 300 KHz to 1.5 MHz clock and proprietary third
generation buck-boost PWM circuitry provide low noise and high efficiency while
minimizing the size of external components. The combination of tiny externals
and a 4 x 5mm DFN or TSSOP-20E package provides a compact solution footprint.
The LTC3112 includes four internal low RDS(ON)
N-channel MOSFETs to deliver efficiencies of up to 95 percent. User-selectable
Burst Mode operation lowers quiescent current to only 50 ÂµA, improving light
load efficiency and extending battery run time. For noise-sensitive
applications, Burst Mode operation can be disabled. The LTC3112 also offers an integrated output current monitor
that enables the load current to be monitored or controlled to a constant
value. Other features include soft-start, overvoltage protection, short circuit
protection, thermal shutdown and output disconnect.
LTC3112EDHD is available in a 16-lead 4 x 5mm DFN package and the LTC3112EFE is
available in a thermally enhanced 20-lead TSSOP package. Pricing starts at
$4.00 each and $4.15 each, respectively for 1,000 piece quantities. Industrial
grade versions, the LTC3112IDHD and LTC3112IFE, are guaranteed to operate over
the -40 to 125C operating junction temperature range and are priced at $4.40
and $4.57 each, respectively, in 1,000-piece quantities.
Researchers at the University of Maryland have achieved a first in lithium-ion battery science: the development of a successful lithium-based battery using one material for all three core components of a battery -- anode, cathode, and electrolyte.
The online Bar Steel Fatigue Database for automotive design engineers has been updated for the fifth time and now contains 134 iterations, or grade/process combinations. It provides better predictability for designing parts with long-term reliability and durability.
FPGAs use programmable fabric to create custom logic, but this flexibility comes at a cost -- usually around 10 times more silicon real estate and 10 times the power dissipation. Can we really claim any FPGA is low power?
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.