Low Noise Dual 600mA Step-Down Converter with Synchronization

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Manufacturer Skyworks


Description :

The AAT2713 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. The AAT2713 incorporates a unique low noise architecture which reduces ripple and spectral noise. Each converter is capable of 600mA output current and has its own enable pin. Efficiency of the converters is optimized over full load range. Total no load quiescent current is 70µA, allowing high efficiency even under light load conditions. The integrated power switches are controlled by pulse width modulation (PWM) with a 1.7MHz typical 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 AAT2713 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.

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    • VIN Range: 2.7V to 5.5V
    • Low Noise Light Load Mode
    • Low Ripple PWM Mode
    • Output Current:
    • Channel 1: 600mA
    • Channel 2: 600mA
    • 96% Efficient Step-Down Converter
    • Low No Load Quiescent Current
    • 70μA 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

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Features Similar products
Control scheme Slope Compensated Peak Current Mode Control  

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Switching frequency (kHz) 1700  
Max Input Voltage (V) 2.7 to 5.5  
Output Voltage (V) 0.6 to 5.5  
Typ. Active Current (µA) 70  
Output Capacitor Type 4.7 to 10 μF, X5R or X7R Ceramic Capacitor  
Output Current (mA) 600  
Operating Temperature (°C) -40 to +85  
Package QFN33-16