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AAT1112IWP-0.6-T1 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT1112IWP-0.6-T1 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
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1 / 20 page  AAT1112 1.5A, 1.4MHz Step-Down Converter 1112.2007.01.1.1 1 SwitchReg™ General Description The AAT1112 SwitchReg is a 1.5A step-down con- verter with an input voltage range of 2.4V 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 small footprint and high efficiency make the AAT1112 an ideal choice for portable applications. The AAT1112 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 AAT1112 an ideal choice for high output voltage, high current applications which require a low dropout threshold. The AAT1112 provides excellent transient response and high output accuracy across the operating range. No external compensation com- ponents are required. The AAT1112 is designed to maintain high efficien- cy throughout the load range. Pulling the MODE/ SYNC pin high enables "PWM Only" mode, main- taining constant frequency and low output ripple across the operating range. Alternatively, the con- verter may be synchronized to an external clock input via the MODE/SYNC pin. Over-temperature and short-circuit protection safeguard the AAT1112 and system components from damage. The AAT1112 is available in a Pb-free, space-sav- ing TDFN33-12 or 2.75x3mm TSOPJW-12 pack- age. The product is rated over an operating tem- perature 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 • 42µA No Load Quiescent Current • No External Compensation Required • 1.4MHz Switching Frequency • Synchronizable to External Clock • Optional "PWM Only" Low Noise Mode • 100% Duty Cycle Low-Dropout Operation • Internal Soft Start • Over-Temperature and Current Limit Protection • <1µA Shutdown Current • TSOPJW-12 or TDFN33-12 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 VP GND PGND LX FB V OUT= 3.3V V IN C 10µF 2 C 22µF 1 L 3.3µH 1 EN R 267k Ω 1 R 59k Ω 2 VIN AAT1112 MODE/SYNC |
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