AnalogicTech Announces New Step-up DC/DC Converter
Advanced Analogic Technologies Inc. (AnalogicTech) (Nasdaq: AATI) announced the AAT1265, a new low-voltage step-up converter for ultraportable applications. Designed for systems running from single- or dual-cell Alkaline, NiMH, or NiCd batteries, the AAT1265 extends AnalogicTech's rapidly growing boost converter line by combining high efficiency and True Load Disconnect in an extremely small footprint.
"Ultraportable systems running from single or dual alkaline, NiMH, or NiCd cells need to boost voltage while conforming to strict requirements for battery life and system size," said Bill Weiss, Product Line Director for AnalogicTech. "The AAT1265 maintains high efficiency over the entire output current range, requires no external compensation, and provides True Load Disconnect — all in a tiny 2.0x2.1mm SC70JW package. This device delivers an ideal balance of high efficiency, essential features, and small total solution size."
The synchronous fixed frequency step-up converter supplies 100mA to a 3.3V load from a single AA cell and 250mA from dual AA cells. The AAT1265 delivers efficiency up to 93 percent and maintains high efficiency over the entire load range. A 2MHz switching frequency helps minimize solution footprint by enabling the use of extremely small inductors and capacitors. Leakage current is a common concern with boost converters. Typically these devices present a conduction path from the input to the output via the body diode of the P-channel MOSFET when the system is not active. To eliminate such power loss, designers often use a load switch and control circuitry to disconnect the load from the converter. AnalogicTech's AAT1265 solves this problem with the True Load Disconnect feature which disconnects the body diode from the output. This feature extends battery life and simplifies the system design by eliminating an external load switch and control circuitry.
The AAT1265 also adds a variety of safety features to preserve the integrity of the device including short-circuit and over-current protection, inrush current limit, and soft start. Specified over the -40°C to +85°C temperature range, the AAT1265 is available in a Pb-free, compact 2.0x2.1mm SC70JW-8 package. The device sells for $0.81 in 1000-piece quantities.
