Product category:
Power Supply ICs and Controllers
News Release from: Micrel | Subject: MIC2238
Edited by the Electronicstalk Editorial
Team on 07 August 2007
Regulator cuts light-load drain to a
trickle
Synchronous buck regulator uses novel switching architecture for industry-leading light load efficiency for Li-ion battery powered systems to prolong charge life.
New from Micrel, the MIC2238 is a 2.5MHz dual 800mA synchronous buck (step-down) regulator housed in a tiny 3 x 3mm MLF package The MIC2238's unique Trickle Mode switching architecture enables industry-leading light load efficiency for Li-ion battery powered systems that require maximum efficiency in order to prolong use
This article was originally published on Electronicstalk on 5 Dec 2000 at 8.00am (UK)
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The MIC2238 is a perfect choice for portable applications including cellular phones, portable media players, WiMAX modules, GPS systems, digital still and video cameras.
The MIC2238 is currently available in volume, with pricing starting at US $1.70, for 1000-unit quantities.
"While today's handheld devices are becoming more powerful, consumers also expect longer battery lives and standby times", says Ralf Muenster, Micrel's Director of Marketing for Power Products.
"Providing two out-of-phase outputs of up to 800mA each, Micrel's MIC2238 has the horsepower to drive today's most demanding portable applications while at the same time, offering astounding light load efficiencies of up to 94% at 5mA and peak efficiencies of more than 96%".
The device offers an input voltage range from 2.5 to 5.5V and an ultralow quiescent current of 28uA at light loads.
This assures that only a trickle of current is drawn from the battery, thereby and extending valuable standby time.
Moreover, the MIC2238's design offers two modes of operation, a variable frequency trickle mode operation for highest light load efficiency with an automatic switchover into full load, and an option for running the device at a constant frequency.
In addition, the device offers a power good output signal for sequencing capability.
The MIC2238 is available in a tiny 12-pin 3 x 3mm MLF with a junction operating range from -40 to +125C.
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