850kHz 700mA Synchronous Buck DC/DC Converter

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Manufacturer Skyworks


Description :

The AAT1151 SwitchReg™ is a member of AnalogicTech's Total Power Management™ IC product family. The step-down switching converter is ideal for applications where high efficiency is required over the full range of output load conditions. The 2.7V to 5.5V input voltage range makes the AAT1151 ideal for single-cell Lithium-Ion/Polymer battery applications. Capable of more than 700mA with internal MOSFETs, the current mode controlled IC provides high efficiency using synchronous rectification. Fully integrated compensation simplifies system design and lowers external parts count. The device operates at a fixed 850kHz switching frequency and enters PFM mode for light load current to maintain high efficiency across all load conditions. The AAT1151 is available in MSOP-8 and QFN33-16 packages, rated over the -40 to +85°C temperature range.

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    • VIN Range: 2.7V to 5.5V
    • Up to 95% Efficiency
    • High Initial Accuracy ±1%
    • 110mΩ RDS(ON) Internal Switches
    • <1μA Shutdown Current
    • 850kHz Switching Frequency
    • Fixed VOUT or Adjustable VOUT ≥1.0V
    • Integrated Power Switches
    • Synchronous Rectification
    • Current Mode Operation
    • Internal Compensation
    • Stable with Ceramic Capacitors
    • PFM for Optimum Efficiency for All Load Conditions
    • Internal Soft Start
    • Over-Temperature Protection
    • Current Limit Protection
    • MSOP-8 and QFN33-16 Packages
    • -40°C to +85°C Temperature Range

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Features Similar products
Control scheme Internally Compensated Current Mode Control  

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Switching frequency (kHz) 850  
Max Input Voltage (V) 2.7 to 5.5  
Output Voltage (V) 1 to 4.2  
Typ. Active Current (µA) 210  
Output Capacitor Type Two 22 μF 6.3 V, X5R Capacitors  
Output Current (mA) 700  
Operating Temperature (°C) -40 to +85  
Package MSOP-8