(Hong Kong)
Product Summary
The AAT3123AITP-20-T1 is a low noise, constant frequency charge pump DC/DC converter that uses a dual mode load switch (1X) and fractional (1.5X) conversion to maximize efficiency for white LED applications. The AAT3123AITP-20-T1 can be used to produce current levels up to 20mA to drive up to six LEDs from a 2.7V to 5.5V input. Outputs may be operated individually or paralleled for driving higher-current LEDs. A low external parts count (two 1uF flying capacitors and two small 1μF capacitors at VIN and OUT) make the AAT3123AITP-20-T1 ideally suited for small battery-powered applications.
Parametrics
AAT3123AITP-20-T1 absolute maximum ratings: (1)VIN Input Voltage: －0.3 to 6 V; (2)VOUT Charge Pump Output: －0.3 to 6 V; (3)FB, VEN/SET FB or EN/SET to GND Voltage: －0.3 to 6 V; (4)VEN/SET(MAX)Maximum EN/SET to Input Voltage: 0.3 V; (5)IOUT 2 Maximum DC Output Current: 150 mA; (6)TJ Operating Junction Temperature Range: －40 to 150 °C.
Features
AAT3123AITP-20-T1 features: (1)Drives Low-VF and High-VF Type LEDs; (2)Up to Six 20mA Outputs (AAT3124); (3)Up to Four 20mA Outputs (AAT3123/23A); (4)32-Position Logarithmic Scale with Digital Control; (5)Simple Serial Control (S2Cwire)Interface; (6)Low Noise Constant Frequency Operation; (7)1MHz Switching Frequency; (8)Small Application Circuit; (9)Regulated Output Current; (10)Automatic Soft Start; (11)No Inductors.
Diagrams
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