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AAT2513 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT2513 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
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1 / 22 page  General Description The AAT2513 is a high efficiency dual synchronous step-down converter for applications where power efficiency, thermal performance and solution size are critical. Input voltage ranges from 2.7V to 5.5V, making it ideal for systems powered by single-cell lithium-ion/polymer batteries. Each converter is capable of 600mA output current and has its own enable pin. Efficiency of the con- verters is optimized over full load range. Total no load quiescent current is 60µA, allowing high effi- ciency even under light load conditions. The integrated power switches are controlled by pulse width modulation (PWM) with a 1.7MHz typi- cal switching frequency at full load, which minimizes the size of external components. Fixed frequency, low noise operation can be forced by a logic signal on the MODE pin. Furthermore, an external clock can be used to synchronize the switching frequency of both converters. A phase shift pin (PS) is available to operate the two converters 180° out of phase at heavy load to achieve low input ripple. The AAT2513 is available in a Pb-free, thermally enhanced 16-pin QFN33 package and is specified for operation over the -40°C to +85°C temperature range. Features •V IN Range: 2.7V to 5.5V • Output Current: — Channel 1: 600mA — Channel 2: 600mA • 96% Efficient Step-Down Converter • Low No Load Quiescent Current — 60µA Total for Both Converters • Integrated Power Switches • 100% Duty Cycle • 1.7MHz Switching Frequency • Optional Fixed Frequency or External SYNC • Logic Selectable 180° Phase Shift Between the Two Converters • Current Limit Protection • Automatic Soft-Start • Over-Temperature Protection • QFN33-16 Package • -40°C to +85°C Temperature Range Applications • Cellular Phones / Smart Phones • Digital Cameras • Handheld Instruments • Micro Hard Disc Drives • Microprocessor / DSP Core / IO Power • PDAs and Handheld Computers AAT2513 Dual 600mA Step-Down Converter with Synchronization Typical Application Input: 2.7V to 5.5V VIN2 LX1 CIN 1μF C2 4.7μF AAT2513 2μH L1 R1 R2 R3 R4 L2 LX2 FB1 FB2 VOUT2 2μH C1 4.7μF PGND1 AGND VCC EN1 EN2 MODE/SYNC PS PGND2 VIN1 VOUT1 2513.2007.04.1.1 1 SystemPower™ |
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