Texas Instruments (News - Alert) Incorporated, a global analog and digital semiconductor IC design and manufacturing company, revealed a buck-boost converter, LM3269, which can improve battery life by cutting current consumption as much as 50 percent and decrease heat generation in the amplifier by up to 30 degrees Celsius.
The LM3269 is a buck-boost DC/DC converter designed to generate output voltages above or below a given input voltage, and is particularly suitable for single cell Li-ion batteries for portable applications. The LM3269 is internally compensated for buck and boost modes of operation, thus providing an optimal transient response.
Earlier this year, Texas Instruments introduced the LM3242 and LM3243 step-down regulators for 2G, 3G and 4G LTE (News - Alert) power amplifiers.
TI's new LM3269 provides seamless-transition buck-boost voltage regulator for RF power amplifiers used in 3G and 4G LTE smartphones, tablets and datacards. 4G smartphones have higher data upload requirements, such as real-time, on-and-off use of applications, which require higher RF power amplifier output levels to support LTE operation – even at lower battery voltages.
The LM3269 saves energy and extends battery run-time by dynamically adjusting the power delivered to power amplifiers based on how much power is needed.
TI's new LM3269 1 operates from a Single Li-Ion Cell: 2.7V to 5.5V. It has adjustable Output Voltage: 0.6V to 4.2V with 750 mA Maximum Load Capability for PVIN ≥ 3.0V, VOUT = 3.8V.
Other features include seamless buck-boost mode transition, fast output voltage transition at 1.4V to 3.0V in 10 μs, high-efficiency at 95 percent typ. at PVIN = 3.7V, an input overcurrent limit, internal compensation, and 12-bump micro SMD Package with solution size 18.8 mm2.
TI has been offering a comprehensive line of DC/DC adaptive power supply circuits for RF power amplifiers. The LM3269 comes in a 2-mm x 2.5-mm x 0.6-mm, 12-bump lead-free mircoSMD package, and is priced at $1.20 in 1,000-unit quantities.
In other news, TMCnet indicated that Texas Instruments, Dallas, has been assigned a patent (8,276,030) developed by Lee D. Whetsel, Parker, Texas, for a scan distributor and parallel scan paths with controlled output buffer.
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Edited by Braden Becker