AAT1154 Advanced Analogic Technologies, AAT1154 Datasheet
AAT1154
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AAT1154 Summary of contents
Page 1
... Able to deliver 3A with an internal power MOSFET, the current-mode controlled IC provides high efficiency. Fully inter- nally compensated, the AAT1154 simplifies system design and lowers external part count. The AAT1154 is available in an SOP-8 package, rated over -40 to 85°C. Typical Application INPUT 10 F 100 0 ...
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... It is used to set the output of the converter to regulate to the desired value. Ground connection. Enable input pin. When connected high, AAT1154 is in normal operation. When connected low powered down. This pin should not be left floating. Power supply. It supplies power for the internal circuitry. ...
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... Note 2: Mounted on a demo board (FR4, in still air). Note 3: Derate 9.1mW/°C above 25°C. Recommended Operating Conditions Symbol Description T Ambient Temperature Range 1154.2003.08.0.91 1MHz 3A Buck DC/DC Converter (T =25°C unless otherwise noted HBM 25° AAT1154 Value Units -40 to 150 ° ...
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... OUT V Rising IN V Falling IN No Load 5. 25° 25° 1.0 A OUT LOAD V = 2 25°C A AAT1154 Min Typ Max Units 2.7 5.5 V -5.0 5.0 % 2.5 V 1.2 V 250 mV 630 1000 µA 1.0 µA 4 2.6 % 0.75 %/V 1 MHz 0.6 V 1.4 V 140 ° ...
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... Buck DC/DC Converter 0.5 0. 5.5V IN -0.25 -0.5 80 100 120 3 Oscillator Frequency Variation vs. Temperature 4.5 5 5.5 -20 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 4.5 5 5.5 -20 AAT1154 Oscillator Frequency Variation vs. Supply Voltage 4 4.5 5 Input Voltage ( Temperature ( C) Output Voltage vs. Temperature I =2A OUT Temperature ( C) 5.5 100 100 5 ...
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... Non-Switching Operating Current vs. Temperature 0 0.7 0.6 0.5 0 -20 Inrush and Output Overshoot Characteristic 100 0 AAT1154 V = 3.3V OUT 3.75 4 4.25 4.5 4.75 5 Input Voltage ( 100 Temperature ( C) 3A Load Inductor Current Input Output 0 ...
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... Loop Crossover Gain and Phase 180 16 135 Phase -45 -4 -90 -8 -135 -12 -180 -16 100000 10000 AAT1154 Output Ripple I = 3.0A 3.3V 5.0V OUT OUT IN 300 µF 6.3VCeramic TDK P/N C3325X5R0J107M Time ( sec) Tantalum Output Ripple I = 3.0A 3.3V 5.0V OUT OUT IN 120 F 6.3V Tantalum Vishay ...
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... OUT 7 100 -100 4 -200 3 -300 2 -400 1 -500 0 -600 -1 -700 400 500 = 5. 400 500 AAT1154 Transient Response = 0 to 3.0A 3.3V 5.0V OUT IN 2x 100 uF 6.3V Ceramic TDK P/N C3325X5R0J107M 0 100 200 300 400 500 Time ( s) 1154.2003.08.0. ...
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... REF FB GND Applications Information Main Control Loop The AAT1154 is a peak current mode buck con- verter. The inner wide bandwidth loop controls the inductor peak current. The inductor current is sensed as it flows through the internal P-Channel MOSFET. A fixed slope compensation signal is then added to the sensed current to maintain sta- bility for duty cycles greater than 50% ...
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... Current Limit and Over Temp Protection The AAT1154 over temp and current limit circuitry protects the AAT1154 as well as the external Schottky diode during overload, short circuit and excessive ambient temperature conditions. The junction over temp threshold is 140°C nominal and has 15°C of hysteresis. Typical graphs of the over temp load current vs ...
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... EMI while facilitating optimum performance of the AAT1154. The proper placement of the input capacitor C1 is shown in the layout in figure 1. Ceramic X5R or X7R capacitors are ideal. The ...
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... Figure 1. AAT1154 Fixed Output Top Side Layout Thermal The losses associated with the AAT1154 output switching MOSFET are due to switching losses and conduction losses. The conduction losses are associated with the R characteristics of the DS(ON) output switching device. At the full load condition, assuming continuous conduction mode (CCM), an ...
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... · 3 1.5 H MHz 1 5.25V · OUT 0.41A = 3.41A AAT1154 Junction Temperature 2 t · F · · R · DS(ON · 65m · 3.3V 20ns · 1MHz · 0.539 Watts T = ...
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... Arms capacitance and is fed directly to the AA1154 through large PCB traces or planes it is not required. When operating the AAT1154 evaluation board on the bench C4 is required due to the inductance of the wires running from the laborato- ry power supply to the evaluation board. Vout ...
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... Vin 2.7V-5.5V C4 100µF rtn Figure 5. AAT1154 Evaluation Board with adjustable output Figure 6. Evaluation Board Top Side 1154.2003.08.0.91 1MHz 3A Buck DC/DC Converter 2.55k AAT1154-1. 0 100 100k FB VP GND VCC VP 10µ 0.1µF 10.0k C1 Murata 10µF 6.3V X5R GRM42-6X5R106K6.3 C2 Vishay 120µF 6.3V 594D127X96R6R3C2T µ ...
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... Inductance I DCR (µH) (Amps 1.5 4.0 .014 1.5 3.2 .025 1.5 3.0 .022 1.5 3.7 .022 1.5 3.8 .016 Part Number B340LA RB050L-40 5820SM AAT1154 Temp Co. Case X5R 1812 X5R 1812 X5R 1812 X5R 1206 C case C case Height (mm) 4.0 shielded 2.8 Non shielded 3.2 shielded 4.7 Non shielded 4.7 shielded Vfwd 0.45V @ 3A 0. 0.46V @ 3A ...
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... Ordering Information Output Voltage Package 1.0V 1.8V 2.5V 3.3V Package Information 4.90 0.10 0.42 0.09 8 1.27 BSC All dimensions in millimeters. 1154.2003.08.0.91 1MHz 3A Buck DC/DC Converter Marking SO-8 SO-8 SO-8 SO-8 SO-8 0.375 0.125 0.825 0.445 AAT1154 Part Number (Tape and Reel) AAT1154IAS-1.0-T1 AAT1154IAS-1.8-T1 AAT1154IAS-2.5-T1 AAT1154IAS-3.3-T1 45 0.235 0.045 17 ...
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... AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 18 AAT1154 1MHz 3A Buck DC/DC Converter 1154.2003.08.0.91 ...