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AAT2514 Datasheet(PDF) 7 Page - Advanced Analogic Technologies |
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AAT2514 Datasheet(HTML) 7 Page - Advanced Analogic Technologies |
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7 / 14 page  AAT2514 Dual Channel 600mA Step-Down Converter SwitchRegTM PRODUCT DATASHEET 2514.2008.02.1.1 7 www .analogictech.com AAT2514 Dual Channel 600mA Step-Down Converter SwitchRegTM PRODUCT DATASHEET 2514.2008.02.1.1 7 www .analogictech.com Functional Description The AAT2514 is a dual high performance 600mA, 1.5MHz fixed frequency monolithic switch-mode step-down con- verter which uses current mode architecture with an adaptive slope compensation scheme. It minimizes exter- nal component size and optimizes efficiency over the com- plete load range. The adaptive slope compensation allows the device to remain stable over a wider range of inductor values so that smaller values (1μH to 4.7μH) with associ- ated lower DCR can be used to achieve higher efficiency. Apart from the small bypass input capacitor, only a small L-C filter is required at each output. The adjustable out- puts can be programmed with external feedback to any voltage, ranging from very low output voltages to the input voltage and by using an internal reference of 0.6V. The part uses internal MOSFETs for each channel to achieve high efficiency. At dropout, the converter duty cycle increases to 100% and the output voltages track the input voltage minus the low RDS(ON) drop of the P-channel high-side MOSFETs. The converter efficiency has been optimized for all load conditions, ranging from no load to 600mA at VIN = 3V with an input voltage range from 2.5V to 5.5V. The internal error amplifier and com- pensation provides excellent transient response, load, and line regulation. Internal soft start eliminates any output voltage overshoot when the enable or the input voltage is applied. Functional Block Diagram - + EA ICOMP + - PWM Logic R Q S _Q POR Counter ISENSE AMP - + 4 3 2 9 1 10 7 REGULATOR 2 (Same as Regulator 1) FB1 EN1 EN2 FB2 IN LX1 POR LX2 8 Bandgap Reference OSC Slope Comp OVDET + - 650mV Regulator 1 600mV IZERO COMP - + Overtemperature and Shortcircuit Protection Non- Overlap Control |
Similar Part No. - AAT2514_08 |
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Similar Description - AAT2514_08 |
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