Product category:
Power Supply ICs and Controllers
News Release from: Advanced Analogic Technologies | Subject: AAT1146 and AAT2512
Edited by the Electronicstalk Editorial
Team on 02 February 2006
Convertors are fast to get power to
baseband chips
Two new DC/DC convertor ICs are optimised for extremely fast transient response in portable systems powered by single-cell lithium-ion/polymer batteries.
Optimised for extremely fast transient response, two DC/DC convertors from Advanced Analogic Technologies (AnalogicTech) are aimed at portable systems powered by single-cell lithium-ion/polymer batteries The power supply supporting a GSM phone baseband chipset must almost instantaneously ramp from a few milliamps to full load, so an extremely fast transient response as provided by these convertors is critical
This article was originally published on Electronicstalk on 16 Jun 2004 at 8.00am (UK)
Related stories
Charge pumps boost white LED drive efficiency
A new generation of high efficiency charge pumps has been developed for white LED applications.
LDO handles big loads in portable kit
The AAT3239 is a new 500mA low-dropout (LDO) linear regulator for battery-operated portable applications.
The AAT1146 and AAT2512 step-down convertors are ideally suited for GSM phone applications and allow design engineers to easily meet these stringent requirements, while keeping the convertor output in regulation.
AnalogicTech's AAT1146 step-down convertor supports an input voltage range of 2.7 to 5.5V and output levels as low as 0.6V.
The device delivers up to 400mA of load current and maintains a no-load quiescent current of just 27uA.
The AAT2512 is a dual-channel synchronous buck convertor operating over the same 2.7V to 5.5V input range.
Each regulator features independent input and enable pins.
Each channel delivers 400mA of load current, and the device supports quiescent current levels of 27uA for light load conditions.
Both the AAT1146 and the AAT2512 are available in fixed or programmable versions with efficiency as high as 98%.
The devices use a high, 1.4MHz typical switching frequency to minimise the size of external components and keep switching losses low.
They feature internal soft-start to eliminate output voltage overshoot, and integrated overtemperature and current limit protection.
The two devices also add 100% duty cycle low-dropout operation.
The AAT1146 and AAT2512 are rated across the -40 to +85C temperature range.
The AAT1146 is available in a Pb-free compact 2.0 x 2.1mm SC70JW-8 package and the AAT2512 is offered in a Pb-free TDFN33-12 package.
• Advanced Analogic Technologies: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
