Dual High-Current, Low-Noise, Step-Down Regulators

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Manufacturer Skyworks


Description :

The AAT2522 SwitchReg is a dual high-current stepdown converter with an input voltage range of 2.7V to 5.5V and an adjustable output voltage from 0.6V to VIN. The 1.4MHz switching frequency enables the use of small external components. The compact footprint and high efficiency make the AAT2522 an ideal choice for portable applications. The AAT2522 delivers load currents up to 3.0A maximum output current per regulator. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AAT2522 an ideal choice for high output-voltage, high current applications which require a low dropout threshold. The AAT2522 provides excellent transient response and high output accuracy across the operating range. The AAT2522's unique architecture requires no external compensation components, and produces reduced ripple and spectral noise. Over-temperature and short-circuit protection safeguard the AAT2522 and system components from damage. The AAT2522 is available in a Pb-free, space-saving 16-pin 3mm x 4mm TDFN package. The product is rated over an operating temperature range of -40°C to +85°C.

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    • Dual 3.0A Peak Output Current Regulators
    • 2.7V to 5.5V Input Voltage Range
    • Adjustable Output Voltage (0.6V to VIN)
    • 100% Duty-Cycle, Low-Dropout Operation
    • Integrated 120mΩ High-Side Power MOSFET
    • Integrated 85mΩ Low-Side Power MOSFET
    • Low Noise Light Load Mode
    • No External Compensation Required
    • Very Low 90μA No-Load Operating Current
    • <1μA Shutdown Current
    • Up to 95% Efficiency
    • 1.4MHz Switching Frequency
    • Overload and Short-Circuit Protection
    • Over-Temperature Protection
    • Internal Voltage Ramped Soft-Start
    • Temperature Range: -40°C to +85°C
    • 16-pin 3mm x 4mm TDFN Package

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Control scheme Peak Current Mode  

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Switching frequency (kHz) 1400  
Max Input Voltage (V) 2.7 to 5.5  
Output Voltage (V) 0.6 to 5.5  
Typ. Active Current (µA) 90  
Output Capacitor Type 10 to 22 μF, X5R or X7R Ceramic Capacitor  
Output Current (mA) 3000  
Operating Temperature (°C) -40 to +85  
Package TDFN34-16