AnalogicTech Delivers Power and Protection With Integrated, Single-Chip Step-Down Converter and Load Switch

New Compact, High-Precision AAT2138 Targets USB 3.0 Peripherals

Aug 02, 2011, 08:00 ET from Advanced Analogic Technologies, Inc.

SANTA CLARA, Calif., Aug. 2, 2011 /PRNewswire/ -- Advanced Analogic Technologies, Inc. (AnalogicTech™) (Nasdaq: AATI), an analog semiconductor company focused on powering innovative solutions in consumer, industrial, and communications markets, today introduced the AAT2138, a 2.5A output current synchronous DC/DC converter with an integrated, +/-10 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.


"USB 3.0, with its higher power capability, is enabling a host of peripheral devices that can run off USB power and do not require an AC/DC adapter," said Hensen Wong, Product Marketing Manager at AnalogicTech. "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 3MHz, 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 tiny 1uH inductor with no external compensation required and comes in a miniature, lead-free, low profile 3mm x 3mm 14-pin TDFN package, making it ideal for space constrained applications.

The AAT2138 is currently shipping and is priced at US$1.19 @1K units. For other quantities, contact AnalogicTech or its distributors.

Key Features:

  • Input Voltage Range: 2.7V to 5.5 V
  • Output Voltage Range: Down to 3.0V
  • Low Quiescent Current:Iq=90uA (typ.)
  • Current-Limited System Load Switch
    • Adjustable Current Limit Range: 500mA to 3A
    • 1.5ms (typ.) Soft Start
    • +/-10% High Precision Current Limit
  • High-Current Step-Down Regulator
    • Efficiency up to 95%
    • 85mOhm High-Side/50mOhm Low-Side FETs
    • 2.8MHz (typ.) Switching Frequency
    • 100% Low Dropout Operation.
    • No External Compensation Required
    • PFM/PWM or forced PWM Operation Mode
    • Supports a 1MHz to 3MHz External Clock
    • Optimized for small 1uH inductor
    • 1ms (typ.)Soft Start
  • Independent Enable Pins
  • Over-Temperature and Over Load Protection
  • -40 degrees C to +85 degrees C Temperature Range
  • Pb-Free, Low-Profile, 3mmx3mm 14-pin TDFN Package

Related Links: SuperSpeed USB from the USB-IF USB SuperSpeed-Enabled Device Shipments to Approach 80 Million in 2011 AnalogicTech's DC/DC Converters (Switching Regulators) AnalogicTech's Step Down Converters

About Advanced Analogic Technologies, Inc.:

Advanced Analogic Technologies, Inc. (AnalogicTech™) (NASDAQ: AATI) develops advanced semiconductor system solutions that play a key role in the continuing evolution of feature-rich, energy efficient electronic devices. The company focuses on addressing the application-specific power management needs of consumer devices such as mobile handsets, digital cameras, and netbooks/notebooks, as well as devices in a broad range of industrial, medical and telecom applications. AnalogicTech also licenses device, process, package, and application-related technologies. Headquartered in Silicon Valley, AnalogicTech has design centers in Santa Clara and Shanghai, and Asia-based operations and logistics. For more information, please visit (AnalogicTech - G).

The AnalogicTech logo is a registered trademark of Advanced Analogic Technologies, Inc. AnalogicTech is a trademark of Advanced Analogic Technologies, Inc. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.

SOURCE Advanced Analogic Technologies, Inc.