1.5A, 1.4MHz Step-Down Converter

Manufacturer's part number :

AAT1112ITP-0.6-T1

NATO number :

AAT1112

Manufacturer Skyworks

Skyworks

Description :

The AAT1112 SwitchReg is a 1.5A step-down converter 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 components are required. The AAT1112 is designed to maintain high efficiency throughout the load range. Pulling the MODE/SYNC pin high enables 'PWM Only' mode, maintaining constant frequency and low output ripple across the operating range. Alternatively, the converter 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-saving TDFN33-12 or 2.75x3mm TSOPJW-12 package. The product is rated over an operating temperature range of -40°C to +85°C.

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    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

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Control scheme Slope Compensated Peak Current Mode Control  

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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) 42  
Typ. Dropout Voltage @ Max. lout (mV) 200  
Output Capacitor Type 10 to 22 μF, X5R or X7R Ceramic Capacitor  
Output Current (mA) 1500  
Operating Temperature (°C) -40 to +85  
Package TSOPJW-12