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AAT1265 Datasheet(PDF) 9 Page - Advanced Analogic Technologies |
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AAT1265 Datasheet(HTML) 9 Page - Advanced Analogic Technologies |
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9 / 13 page  AAT1265 Low Voltage 2MHz Step-Up DC/DC Converter in SC70JW Package SwitchRegTM PRODUCT DATASHEET 1265.2007.12.1.4 9 www .analogictech.com Functional Description The AAT1265 synchronous step-up converter is targeted for single- or dual-cell alkaline, NiMH, and NiCd and single-cell lithium-ion/polymer battery applications. It has a 1V typical start-up voltage with operation after start-up to less than 0.8V. The high 2MHz switching frequency of the AAT1265 facilitates output filter component size reduction for improved power density and reduced overall footprint. It also provides greater bandwidth and improved transient response over other lower frequency step-up converters. The compensation and feedback is integrated with only three external components (CIN, COUT, L). Low RDS(ON) synchronous power switches provide high efficiency for heavy load conditions. Switching frequency modulation and low quiescent current maintains this high efficiency for light load and sleep mode conditions. In addition to the improved efficiency, the synchronous boost has the added performance advantage of true load disconnect during shutdown (<1μA shutdown current), inrush current limit, and short-circuit protection. PWM / Light Load Control The AAT1265 is a fixed frequency PWM peak current mode control step-up converter. For light load conditions (10 to 20mA and below), the converter transitions to a variable Functional Block Diagram Voltage Reference Logic DH DL V REF OUT GND EN GND LX Comp. VIN VCC Mode Control Low Voltage Start-Up Start-Up Inrush Control Current Sense Error Amp. 2MHz Oscillator |
Similar Part No. - AAT1265_07 |
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Similar Description - AAT1265_07 |
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