1.5MHz 250mA Step-Down DC/DC Converter

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Manufacturer Skyworks


Description :

The AAT1121 SwitchReg is a 1.5MHz step-down converter with an input voltage range of 2.7V to 5.5V and output as low as 0.6V. Its low supply current, small size, and high switching frequency make the AAT1121 the ideal choice for portable applications. The AAT1121 delivers 250mA of load current, while maintaining a low 30μA no load quiescent current. The 1.5MHz switching frequency minimizes the size of external components, while keeping switching losses low. The AAT1121 feedback and control delivers excellent load regulation and transient response with a small output inductor and capacitor. The AAT1121 is available in a Pb-free, 8-pin, 2x2mm TDFN or STDFN package and is rated over the -40°C to +85°C temperature range.

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    • VIN Range: 2.7V to 5.5V
    • VOUT Range: 0.6V to VIN
    • 250mA Max Output Current
    • Up to 96% Efficiency
    • 30μA Typical Quiescent Current
    • 1.5MHz Switching Frequency
    • Soft-Start Control
    • Over-Temperature and Current Limit Protection
    • 100% Duty Cycle Low-Dropout Operation
    • <1μA Shutdown Current
    • Small External Components
    • Ultra-Small TDFN22-8 or STDFN22-8 Package
    • Temperature Range: -40°C to +85°C

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Features Similar products
Control scheme Slope Compensated Peak Current Mode Control  

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Switching frequency (kHz) 1500  
Max Input Voltage (V) 2.7 to 5.5  
Output Voltage (V) 0.6 to 5.5  
Typ. Active Current (µA) 30  
Output Capacitor Type 4.7 to 10 μF, X5R or X7R Ceramic Capacitor  
Output Current (mA) 250  
Operating Temperature (°C) -40 to +85  
Package TDFN22-8