New from Advanced Analogic Technologies is the AAT2138, a 2,5 A output current, synchronous DC-DC converter with an integrated, ±10% precision current limit load switch designed to regulate the power in USB peripherals. Capable of supporting power levels beyond the USB 3.0 standard, the device is applicable to USB-powered devices including wireless modem data cards, portable hard drives or RAID systems, and card readers.
The AAT2138’s 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, it is optimised for a tiny 1 μH inductor with no external compensation required and comes in a lead-free, 3 x 3 mm 14-pin TDFN package.
The device has an input voltage range from 2,7 to 5,5 V and output voltage down to 3,0 V. Quiescent current is typically only 90 μA and the integrated load switch’s current limit is adjustable between 500 mA and 3 A.
For more information contact Marinus Rudman, Hi-Q Electronics, +27 (0)21 595 1307, , www.hi-q.co.za
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