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AAT2158 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT2158 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
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1 / 16 page  AAT2158 1.5A Low Noise Step-Down Converter SwitchRegTM PRODUCT DATASHEET 2158.2008.02.1.2 1 www .analogictech.com General Description The AAT2158 SwitchReg is a 1.5A step-down converter with an input voltage range of 2.4V to 5.5V and an adjust- able output voltage from 0.6V to VIN. The 1.4MHz switch- ing frequency enables the use of small external compo- nents. The small footprint and high efficiency make the AAT2158 an ideal choice for portable applications. The AAT2158 delivers 1.5A maximum output current while consuming only 42μA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AAT2158 an ideal choice for high output voltage, high current applications which require a low dropout threshold. The AAT2158 provides excellent transient response and high output accuracy across the operating range. No external compensation components are required. The AAT2158 maintains high efficiency throughout the load range. The AAT2158’s unique architecture produces reduced ripple and spectral noise. Over-temperature and short-circuit protection safeguard the AAT2158 and sys- tem components from damage. The AAT2158 is available in a Pb-free, space-saving 16-pin 3x3mm QFN package. The product is rated over an operating temperature range of -40°C to +85°C. Features • 1.5A Maximum Output Current • Input Voltage: 2.4V to 5.5V • Output Voltage: 0.6V to VIN • Up to 95% Efficiency • Low Noise Light Load Mode • 42μA No Load Quiescent Current • No External Compensation Required • 1.4MHz Switching Frequency • 100% Duty Cycle Low-Dropout Operation • Internal Soft Start • Over-Temperature and Current Limit Protection • <1μA Shutdown Current • 16-Pin 3x3mm QFN Package • Temperature Range: -40°C to +85°C Applications • Cellular Phones • Digital Cameras • Hard Disk Drives • MP3 Players • PDAs and Handheld Computers • Portable Media Players • USB Devices Typical Application 2.2µH L1 22µF C3 10µF C1 2.5V 3.3V 187k R3 59k R4 LX 14 N/C 6 EN 7 VCC 9 VP 10 N/C 8 LX 13 PGND 3 VP 12 VP 11 FB 4 LX 15 PGND 2 PGND 1 SGND 5 N/C 16 AAT2158 U1 |
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