Integrated, single-chip step-down converter and load switch delivers power with protection
August 02, 2011 // Paul Buckley
Advanced Analogic Technologies, Inc., has introduced a 2.5 A output current synchronous DC/DC converter with an integrated, Ī10 percent precision current limit load switch designed to safely and efficiently regulate the power in USB peripherals. Capable of supporting power levels beyond the USB 3.0 standard, the AAT2138 offers an ideal solution for a broad range of USB-powered devices including wireless modem data cards, portable hard drives or RAID systems, and card readers.
Hensen Wong, Product Marketing Manager at AnalogicTech, said: “Consequently, peripheral system designers must take great care to make sure they safely maximize the power they receive from the USB host. By offering the safety of a precision current limit switch and the 95 percent efficiency of a DC/DC converter together in a single package, the AAT2138 enables system designers to develop small form-factor, energy efficient products that never exceed the compliance of the USB power supply, even under harsh transient conditions.”
The AAT2138 delivers maximum flexibility in one of the smallest single chip solutions in the marketplace. Its broad feature set includes selectable PFM/PWM modes, an external synch clock up to 3 MHz, independent enable pins for the DC/DC converter and load switch, and adjustable output voltage and current limit. Additionally, the part is optimized for a 1 µH inductor with no external compensation required and comes in a miniature, lead-free, low profile 3 mm x 3 mm 14-pin TDFN package, making it ideal for space constrained applications.
The AAT2138 is currently shipping and is priced at $1.19 for 1K units.
Visit Advanced Analogic Technologies at www.analogictech.com
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Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
And the winners are...
In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
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