Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2006-) | Subject: TPS62290 etc
Edited by the Electronicstalk Editorial
Team on 01 August 2007
Low-voltage convertors are smallest yet
High-performance step-down DC/DC convertors support low-power DSPs and microcontroller-based equipment, saving space in portable designs.
Texas Instruments has unveiled its smallest 2.25MHz high-performance step-down DC/DC convertors, which support low-power DSPs and microcontroller-based portable electronics Extending battery life in Bluetooth headsets, cellphones and other Li-ion battery-powered applications, the high-performance convertors save valuable board space
This article was originally published on Electronicstalk on 4 Apr 2006 at 8.00am (UK)
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The 300mA, 600mA and 1A synchronous, step-down DC/DC convertors can efficiently regulate output voltages down to 0.6V with +/-1.5% accuracy, enabling the devices to power TI's newest C5000 and DaVinci DSPs, low-power MSP430 microcontrollers and other controllers with ultra-precise processor core supply requirements.
The TPS62290 provides up to 1A of output current, and can be powered by a single-cell lithium-ion (Li-ion), three-cell nickel metal hydride (NiMH) and three-cell alkaline batteries with an input voltage range of 2.3 V to 6 V.
The convertor, which operates at a low 15uA quiescent current, enters a power save mode during light load operating conditions and maintains efficiency up to 95% over the entire load current range.
For low-noise applications, the device can be forced into fixed frequency pulsewidth modulation (PWM) mode by pulling the mode pin high.
In the shutdown mode, the TPS62290's current consumption is reduced to less than 1uA.
TI also introduced the TPS62260, which supports up to 600mA of output current, and the TPS62240 to support up to 300mA.
Both devices contain the same functionality and high-performance as the TPS62290 but can support a slightly wider input voltage range of 2 to 6V.
Combining the tiny 6-pin, 2 x 2mm SON package with a maximum height of 0.8mm and a frequency of 2.25MHz, allows the TPS62290, TPS62260 and TPS62240 devices to save designers valuable board space in space-constrained battery power applications.
For example, the TPS62260 can achieve a total solution size of 21.5mm2 by adding only three additional components, including a tiny 2.2uH inductor and a 4.7uF input capacitor and an inexpensive 10uF output capacitor.
All three convertors are shipping in volume from TI and its authorised distributors.
Suggested retail pricing for the TPS62240 is US $0.95 in 1000-piece quantities.
The TPS62260 is priced at $1.20 and the TPS62290 is available at $1.75 in 1000-piece quantities.
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