AnalogicTech’s High Voltage Step-down Converters Boost Power Efficiency of Networking, Wireless LAN Equipment

AnalogicTech’s High Voltage Step-down Converters Boost Power Efficiency of Networking, Wireless LAN Equipment

24V, High Current Buck Converters with Integrated LDO Regulators

Santa Clara, CA – August 12, 2008 – Advanced Analogic Technologies Incorporated (AnalogicTech) (Nasdaq: AATI), a developer of power management semiconductors for mobile consumer electronic devices, announced today the AAT1189 , AAT2687, and AAT2689 , a new family of high voltage, high current, non-synchronous step-down converters capable of providing high efficiency power conversion from 24V supplies. Fabricated in AnalogicTech’s proprietary high voltage Modular BCD process, these new devices offer cost savings for wireless LAN, DSL and cable modem, and set-top box designs by integrating a buck converter with a low noise low dropout regulator (LDO).

“ While AnalogicTech has largely focused on products for mobile electronics applications, our proprietary Modular BCD fabrication process offers unique advantages in higher voltage applications,” said Dan Dempsey, product line director for AnalogicTech. “By supporting input voltages up to 24V and combining a highly efficient non-synchronous buck converter with an LDO optimized for noise-sensitive applications, this new family of products offers designers of LAN equipment operating off a low-cost 12V adapter an ideal opportunity to boost efficiency while reducing product footprint.”

Multiple Configurations

Operating from an input voltage between 6.0V and 24V, the AAT1189 step-down converter is targeted at consumer electronics equipment operating from a low cost AC/DC adapter. It delivers up to 2.5A output current. A 490 kHz switching frequency allows designers to use smaller filtering components and keep total solution size small. The use of voltage mode control helps optimize performance across the entire load range.

The AAT2687 and AAT2689 combine a high voltage step-down converter with a low input voltage low dropout (LDO) regulator. The buck converters on both devices operate off a 6V to 24V input and deliver a VOUT of 1.5V to 5.5V. The buck converter on the AAT2689 delivers up to 2.5A. On the AAT2687 the buck converter supplies up to 4.5A. Like the AAT1189, the AAT2687 and AAT2689 take advantage of high frequency switching to support the use of smaller external filtering components.

The AAT2687 and AAT2689 devices feature an LDO capable of delivering 600 mA. The LDO offers low output noise, low quiescent current and excellent transient response. Separate enable pins allow the designer to independently control the buck converter and the LDO. Shutdown current is

All three devices in the new product family feature internal soft start, over-temperature protection and adjustable over-current protection.

Price and Availability

All three devices in the new product family feature internal soft start, over-temperature protection and adjustable over-current protection.