AAT3140ITP-T1 Advanced Analogic Technologies, Inc., AAT3140ITP-T1 Datasheet
AAT3140ITP-T1
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AAT3140ITP-T1 Summary of contents
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General Description The AAT3140 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED appli- cations. The device produces current levels ...
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Pin Descriptions Pin # Symbol Function 1 C2+ Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2 Charge pump output. Requires 1µF capacitor connected between this pin and ground. 3 C1- Flying capacitor 1 ...
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Absolute Maximum Ratings Symbol Description V Input Voltage IN V EN/SET to GND Voltage EN/SET 2 I Maximum DC Output Current OUT T Operating Junction Temperature Range J Thermal Information 3 Symbol Description P Maximum Power Dissipation D θ Maximum ...
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Electrical Characteristics 1.0µ 3.5V. IN Symbol Description Input Power Supply V Operation Range IN I Operating Current cc I Shutdown Current SHDN I Output ...
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Typical Characteristics V = 3.5V 1µ Efficiency vs. Input Voltage (Code 26) 100 90 3. 2.9 3.0 3.1 3.2 ...
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Typical Characteristics V = 3.5V 1µ Turn- Mode (4x19mA Load) EN/SET (2V/div (4V/div) V DIODE (2V/div (100mA/div) Time (100µs/div) Turn-On ...
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Typical Characteristics V = 3.5V 1µ Charge Pump to Load Switch (1.5X Mode, 4x19mA Load (500mV/div (1V/div) V DIODE (500mV/div ...
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Typical Characteristics V = 3.5V 1µ Line Response (1X Mode, 4x19mA Load (0.5V/div) V LED (20mV/div (0.5V/div (10mA/div) Time (1ms/div) ...
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Typical Characteristics V = 3.5V 1µ Input Current vs. Input Voltage (4x10mA 3.4V DIODE ...
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Functional Block Diagram 2 S Cwire EN/SET Interface Functional Description The AAT3140 is a tri-mode load switch (1X) and high-efficiency (1.5X or 2X) charge pump device intended for white LED backlight applications. To maximize power conversion efficiency, an internal sensing ...
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Applications Information Constant Current Output Level Settings The constant current source amplitudes for are set via the serial interface according to a loga- rithmic scale where each code is 1dB greater than the previous code. In this ...
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S 2 Cwire Serial Interface The current source output magnitude is controlled by the EN/SET pin, using AnalogicTech's S interface. The interface records rising edges of the EN/SET pin and decodes them into 32 individual current level settings with Code ...
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Back-injected noise appearing on the input pin of the charge pump is 20mV peak-to-peak, typi- cally ten times less than inductor-based DC/DC boost converter white LED backlight solutions. The AAT3140 soft-start feature prevents noise transient effects associated with inrush ...
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In addition, with an ideal 1.5X charge pump, the output current may be expressed as 2/3 of the input current. The expression to define the ideal efficiency (η) can be rewritten as: × η = OUT OUT ...
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... XYY = assembly and date code. 2. Sample stock is generally held on all part numbers listed in BOLD. 3140.2007.03.1.3 High Efficiency 1X/1.5X/2X Charge Pump Marking 1 Part Number (Tape and Reel) KZXYY AAT3140ITP-T1 TSOPJW-12 0.20 + 0.10 - 0.05 7° NOM 4° ± 4° 0.055 ± 0.045 0.010 ...
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... Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service with- out notice. Except as provided in AnalogicTech’ ...