600mA, 1.2MHz, Micropower Synchronous Step-Up Converter

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Manufacturer Skyworks


Description :

The AAT1217 a high efficiency, synchronous, fixed frequency, step-up converter designed for single-cell or dual-cell alkaline, NiMH, or NiCd battery-powered applications. The high 1.2MHz switching frequency and completely integrated control circuitry minimize the total solution footprint area while maintaining excellent regulation, ripple, and transient response throughout the full load range. Pulse skipping mode operation and low quiescent current allow the AAT1217 to maintain high efficiency performance for light load and sleep mode conditions. With a 1.2A peak switch current limit, the AAT1217 is capable of delivering 100mA to the load from a single AA cell or up to 400mA from dual AA cells. The AAT1217 has a 0.85V start-up voltage with operation down to 0.5V. The AAT1217 is available in a Pb-free, space-saving low profile (1mm) 6-pin TSOT23 package and is rated over the -40°C to +85°C ambient temperature range.

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    • VIN Operation Range: 0.5V to VOUT
    • VOUT Range: 2.5V to 5.5V
    • 100mA Output from a Single AA Cell Input
    • 400mA Output from a Dual AA Cell Input
    • 500mA Output from a Single Li+ Cell Input
    • High Efficiency: Up to 93% Efficiency
    • Low Start-Up Voltage: 0.85V Typical
    • Internal Synchronous Rectifier
    • VOUT ≤ 4.5V: No External Schottky Diode
    • Fixed Frequency Pulse Width Modulation (PWM) Current-Mode Control Scheme with Internal Compensation
    • 1.2MHz Fixed Switching Frequency
    • 1.2A Current Limit
    • Light Load Mode Operation
    • Over-Current Protection
    • EMI Reduction Anti-Ringing Control Circuitry
    • Low Shutdown Current: <1.0μA
    • -40°C to +85°C Ambient Temperature Range
    • Low Profile (1mm) TSOT23-6 or SOT23-6 Package

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Features Similar products
Control scheme Fixed Frequency Pulse Width Modulation (PWM) Current-Mode Control  

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Switching frequency (kHz) 1200  
Max Input Voltage (V) 0.5 to 5.5  
Output Voltage (V) 2.5 to 5.5  
Typ. Active Current (µA) 300  
Typ. Output Voltage Accuracy (%) ± 4  
Output Capacitor Type 4.7 to 10 μF, X5R or X7R, Ceramic Capacitor  
Output Current (mA) 600  
Operating Temperature (°C) -40 to +85  
Package SOT-23-6