AAT1154_06 ANALOGICTECH [Advanced Analogic Technologies], AAT1154_06 Datasheet
AAT1154_06
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AAT1154_06 Summary of contents
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General Description The AAT1154 SwitchReg is a step-down switching converter ideal for applications where high efficien- cy, small size, and low ripple are critical. Able to deliver 3A with an internal power MOSFET, the cur- rent-mode controlled IC provides high ...
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Pin Descriptions Pin # Symbol GND VCC Pin Configuration 2 1MHz 3A Step-Down DC/DC Converter Function Feedback input pin. This pin must be connected to the converter output. ...
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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 Under-Voltage ...
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Typical Characteristics Efficiency vs. Load Current ( 3.3V) IN OUT 100 0.01 0.1 Output Current (A) Oscillator Frequency Variation vs. Supply Voltage 0.5 0.25 0 -0.25 -0.5 3.5 ...
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Typical Characteristics Output Voltage vs. Temperature (I = 2A) OUT 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 - Temperature (° ° C) Over-Temperature Current vs. Input Voltage (V = 3.3V) OUT 3.6 3.4 70°C 3.2 3 2.8 ...
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Typical Characteristics Inrush and Output Overshoot Characteristics (3A Load) 14 Inductor Current Input 4 2 Output 0.4 0.8 1.2 Time (ms) Output Ripple (I = 3.0A 3.3V; V OUT OUT 4 ...
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Typical Characteristics Loop Crossover Gain and Phase 16 120μF 6.3V Tantalum 12 Vishay P/N 594D127X96R3C2T Gain -8 -12 -16 10000 Frequency (Hz) Transient Response ( 3.0A 3.3V; V OUT OUT 100 ...
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Functional Block Diagram FB Applications Information Main Control Loop The AAT1154 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 3.5V to 5.5V C4 100µF C1 10µF rtn Inductor The output inductor is selected to limit the ripple current to 20% to 40% of full load current at the maximum input voltage. Manufacturer's specifica- tions list both the inductor ...
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Schottky Freewheeling Diode The Schottky average current is the load current multiplied by one minus the duty cycle. For V and V at 3.3V, the average diode current is: OUT V ⎛ ⎞ ⎛ · ...
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Figure 2: AAT1154 Fixed Output Top Side Layout. Layout Figures 2 and 3 display the suggested PCB layout for the fixed output AAT1154. The following guide- lines should be used to help ensure a proper layout. 1. The connection from ...
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Design Example (See Figures 1 and 4 for reference OUT I 30% of Full Load at Max V RIPPLE V 3.3V OUT 5V ± 1MHz S T 70°C MAX Inductor Selection V V ⎛ ⎞ ...
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The 120µF Vishay 594D tantalum capacitor has an ESR of 85mΩ and a ripple current rating of 1.48Arms case size. Although smaller case sizes are suf- ficiently rated for this ripple current, their ESR level would result ...
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Figure 6: Evaluation Board Adjustable Output Top Side Layout. Capacitors Part Number Manufacturer C4532X5ROJ107M TDK GRM43-2 X5R 107M 6.3 MuRata GRM43-2 X5R 476K 6.3 MuRata GRM42-6 X5R 106K 6.3 MuRata 594D127X_6R3C2T Vishay 595D107X0016C Vishay Inductors Part Number Manufacturer CDRH6D38-4763-T055 Sumida ...
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Ordering Information Output Voltage Package ≥ 1.0V) 1.0V (Adj. V OUT 1.8V 2.5V 3.3V All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor products that are in compliance with current RoHS standards, including the requirement that ...