AAT1155IKS-1.0-T1 Advanced Analogic Technologies, Inc., AAT1155IKS-1.0-T1 Datasheet
AAT1155IKS-1.0-T1
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AAT1155IKS-1.0-T1 Summary of contents
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General Description The AAT1155 SwitchReg is a step-down switching converter ideal for applications where high efficien- cy, small size, and low ripple are critical. Able to deliver 2.5A with an internal power MOSFET, the current-mode controlled IC provides high efficien- ...
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Pin Descriptions Pin # Symbol GND VCC Pin Configuration 2 1MHz 2.5A Step-Down DC/DC Converter Function Feedback input pin. Signal ground. Converter enable pin. Small signal filtered bias ...
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Absolute Maximum Ratings T = 25°C, unless otherwise noted. A Symbol Description VCC GND GND GND GND EN T Operating Junction Temperature ...
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Electrical Characteristics 5V -40°C to +85°C, unless otherwise noted. Typical values are Symbol Description V Input Voltage Range IN V Output Voltage Tolerance OUT V Input Low ...
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Typical Characteristics Efficiency vs. Load Current (V = 5.0V 3.3V) IN OUT 100 0.01 0.1 Output Current (A) Oscillator Frequency Variation vs. Input Voltage (V = 3.3V) OUT 0.5 0.25 ...
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Typical Characteristics Output Voltage Variation vs. Temperature ( 3.3V) OUT O 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 - Temperature (° ° C) AAT1155 Evaluation Board Over-Temperature Current vs. Input Voltage (V = ...
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Typical Characteristics Inrush and Output Overshoot Characteristics 0.4 0.8 1.2 Time (ms) Loop Crossover Gain and Phase 300μF gain -8 100μF 6.3 Ceramic TDK ...
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Typical Characteristics Tantalum Transient Response ( 3.0A 3.3V; V OUT OUT 3.40 3.30 3.20 3.10 3.00 2.90 2.80 120μF 6.3V Tantalum 2.70 Vishay P/N 594D127X96R3C2T 2.60 0 100 200 300 Time (μ μ s) Transient ...
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Functional Block Diagram FB Applications Information Main Control Loop The AAT1155 is a peak current mode step-down converter. The inner wide bandwidth loop controls the inductor peak current. The inductor current is sensed as it flows through the internal P-channel ...
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Vin 2.7V-5.5V C4 100µF C1 10µF rtn Figure 1: AAT1155 Evaluation Board with Adjustable Output. Current Limit and Over-Temperature Protection Over-temperature and current limit circuitry pro- tects the AAT1155 and the external Schottky diode during overload, short-circuit, and excessive ambi- ...
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Schottky Freewheeling Diode The Schottky average current is the load current multiplied by one minus the duty cycle. V ⎛ ⎞ ⎝ V ⎠ IN For and V at 3.3V, the average diode IN ...
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A high ESR tantalum capacitor with a value about 10 times the input ceramic capacitor may also be required when using a 10µF or smaller ceramic input bypass capacitor. This dampens any input oscilla- tions that may occur due to ...
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Thermal Losses associated with the AAT1155 output switch- ing MOSFET are due to switching losses and con- duction losses. The conduction losses are associ- ated with the R characteristics of the output DS(ON) switching device. At the full load condition, ...
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AAT1155 Junction Temperature 2 t · F · · R · V ⎛ DS(ON ⎝ IN 2.5 2 · 70mΩ · 3.3V ⎛ 20ns · ...
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Adjustable Output For applications requiring an output other than the fixed outputs available, the 1V version can be pro- grammed externally. Resistors R3 and R4 of Figure 1 force the output to regulate higher than Capacitors Part Number Manufacturer C4532X5ROJ107M ...
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... Sample stock is generally held on part numbers listed in BOLD. 16 1MHz 2.5A Step-Down DC/DC Converter Marking 1 MSOP-8 KXXYY MSOP-8 KYXYY MSOP-8 ILXYY MSOP-8 IKXYY MSOP-8 1.95 BSC 0.254 BSC 3.00 ± 0.10 10° ± 5° 0.30 ± 0.08 0.65 BSC AAT1155 Part Number (Tape and Reel) 2 AAT1155IKS-1.0-T1 AAT1155IKS-1.8-T1 AAT1155IKS-2.5-T1 AAT1155IKS-3.3-T1 4° ± 4° 0.60 ± 0.20 0.155 ± 0.075 1155.2006.09.1.7 ...
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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 without notice. ...