Part Name
AAT3114AISN-20-T1
MFG CO.
Analog Technology Inc
General Description
The AAT3113 and AAT3114/14A are low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. A low external parts count (two 1µF flying capacitors and two small bypass capacitors at VIN and OUT) makes these devices ideally suited for small, battery-powered applications.
FEATUREs
• AAT3113: Four Outputs
• AAT3114/14A: Six Outputs
• 20mA Full-Scale Current
• Simple Serial Control (S2 Cwire) Interface
▪ 32-Position Logarithmic Scale with Digital Control
• Low Noise Constant Frequency Operation
• 33% Less Input Current Than Doubler Charge Pump
• High Accuracy Brightness Matching
• Small Application Circuit
• Regulated Output Current
• Automatic Soft Start
• VINRange: 2.7V to 5.5V
• No Inductors
• 600kHz Switching Frequency
• IQ<1µA in Shutdown
• Temperature Range: -40°C to 85°C
• 12-Pin TSOPJW Package (AAT3113)
• 16-Pin QFN Package (AAT3114/14A)
Part Name
Description
PDF
MFG CO.
High Efficiency 1.5X Fractional Charge Pump for White LED Applications
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High Efficiency 1.5X Fractional Charge Pump For White LED Applications ( Rev : 2006 )
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