Power Management ICs help extend battery life.
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Press Release Summary:
Suited for portable applications, AAT2782/AAT2783 operate off 2.7-5.5 V input and provide 3 independently regulated dc outputs: 2 step-down converters and one low input voltage LDO. Converters on AAT2782 deliver 1,200 and 600 mA, while those on AAT2783 supply 1,000 and 400 mA. Low input voltage LDO, optimized for low-noise operation, operates off 1.7 V input and delivers up to 400 mA with -80 dB power supply rejection ratio and 65 µV(RMS) output noise with optional bypass capacitor.
Original Press Release:
AnalogicTech's New PMICs Extend Battery Life by Delivering Low Noise Power at High Efficiency
Compact ICs Combine Two Step-down Converters with Low V(IN) LDO
SANTA CLARA, Calif., July 30 -- Advanced Analogic Technologies, Inc. (AnalogicTech(TM)) (NASDAQ:AATI), a developer of power management integrated circuits for communications, computing and consumer electronic devices, announced today the AAT2782 and AAT2783, two new power management ICs (PMICs) for portable applications. Combining two step-down converters with a low V(IN) LDO, these new devices can be used to power both traditional power management functions and noise-sensitive circuits without compromising power efficiency.
"While many portable systems, such as wireless data cards, need a typical 3.3-V source to drive a processor, memory or I/O and a lower voltage source to power noise-sensitive circuits, it is very difficult to support those functions at high efficiency with a single PMIC," said Dan Dempsey, product line director for AnalogicTech. "By combining two buck converters with a low V(IN) LDO and using the LDO to post-regulate the second buck converter, the AAT2782 and AAT2783 extend battery life and reduce board footprint by powering both standard 3.3-V circuits and lower voltage noise sensitive circuits while maintaining high power efficiency."
Efficient Power Conversion
The AAT2782 and AAT2783 operate off a 2.7V to 5.5V input range and provide three independently regulated DC outputs: two step-down converters and one low input voltage LDO. The two step-down converters on the AAT2782 deliver 1200 mA and 600 mA respectively. On the AAT2783 the two step-down converters supply 1000 mA and 400 mA. On each IC both converters use current mode control to ensure fast transient response and stable operation across the entire operating range. A 1.3 MHz switching frequency supports the use of small external filters.
The low input voltage LDO on both devices is optimized for low noise operation. Designed to operate off a 1.7V input, the LDO delivers up to 400 mA with a -80 dB power supply rejection ratio (PSRR) and 65 uV(RMS) output noise with an optional bypass capacitor. The LDO's output voltage is factory set at 1.2V.
The step-down converters on both devices offer high efficiency rates. Using the LDO to post-regulate the output of the second step-down converter for low-noise operation, both devices achieve efficiency levels up to 80 percent.
The two new PMICs are fabricated in AnalogicTech's proprietary Modular BCD process. Total quiescent current is 170 uA for the AAT2782 and 135 uA for the AAT2783. Both devices feature 200 us internal soft start and over-temperature protection.
Modular BCD Process Technology
The AAT2782 and the AAT2783 are fabricated in AnalogicTech's proprietary ModularBCD process. Compared to linear-IC legacy fabs and generic digital CMOS foundries, ModularBCD provides more cost-effective, modular fabrication of analog, power and mixed-signal ICs by monolithically integrating fully-isolated CMOS at multiple voltages, complementary bipolar transistors, and robust power devices. This process avoids complex and expensive techniques such as epitaxy and high-temperature diffusion. Devices manufactured in ModularBCD offer higher efficiency, smaller size and higher levels of integration than those fabricated in many other processes.
Price and Availability
Qualified across the -40 C to +85 degrees C temperature range, the AAT2782 and AAT2783 are available in a Pb-free, 16-pin, TDFN package. The ICs sell for $1.93 and $1.93 respectively in 1K quantities.
About AnalogicTech
Advanced Analogic Technologies, Inc. (AnalogicTech) is a supplier of Total Power Management(TM) semiconductor solutions for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, wireless LAN, and personal media players. The company focuses its design and marketing efforts on the application-specific power management needs of consumer, communications, and computing applications in these rapidly evolving devices. AnalogicTech also develops and licenses device, process, package, and application-related technology. AnalogicTech is headquartered in Santa Clara, California and Macau, S.A.R., with offices in China (Beijing, Shanghai and Shenzhen), Hong Kong, Taiwan, Japan, South Korea, Sweden, France and United Kingdom, as well as a worldwide network of sales representatives and distributors. The company is listed on the NASDAQ exchange under the ticker symbol AATI. For more information, please visit the AnalogicTech website: www.analogictech.com/. (AnalogicTech - G)
AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
CONTACT: Headquarters, Brandon Pham of Advanced Analogic Technologies, Inc., +1-408-737-4600, bpham at analogictech.com; or Agency, Matthew Quint, +1-650-599-9450, mquint@quintpr.com, for Advanced Analogic Technologies, Inc.
