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AAT2789 Datasheet(PDF) 4 Page - Advanced Analogic Technologies |
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AAT2789 Datasheet(HTML) 4 Page - Advanced Analogic Technologies |
4 / 22 page AAT2789 Low Noise, High Frequency Dual Step-Down Converter SystemPowerTM PRODUCT DATASHEET 4 2789.2008.03.1.0 www .analogictech.com AAT2789 Low Noise, High Frequency Dual Step-Down Converter SystemPowerTM PRODUCT DATASHEET 4 2789.2008.03.1.0 www .analogictech.com Electrical Characteristics1 VIN = 3.6V, TA = -40°C to 85°C, unless noted otherwise. Typical values are at TA = 25°C. Symbol Description Conditions Min Typ Max Units Channel 1: 1700mA Step-Down Converter VP1, VCC1 Input Voltage 2.7 5.5 V VUVLO1 UVLO Threshold VP1 Rising 2.4 V VP1 Hysteresis 250 mV VP1 Falling 1.7 V VOUT1 Output Voltage Range 0.6 VP1 V VOUT1(TOL) Output Voltage Tolerance IOUT1 = 0A to 1.7A; VP1 = 2.7V to 5.5V -3.0 3.0 % IQ1 Quiescent Current No load, VEN1 = VP1, VEN2 = AGND 42 90 μA ISHDN1 Shutdown Current VEN1 = GND 1.0 μA ILIM1 Current Limit 1800 mA RDSON(H)1 High Side On-Resistance 120 mΩ RDSON(L)1 Low Side On-Resistance 85 mΩ ΔVLOADREG1 Load Regulation IOUT1 = 0A to 1.7A 0.5 % ΔVLINEREG1 / ΔVP1 Line Regulation VP1 = 2.7V to 5.5V 0.2 %/V FOSC1 Oscillator Frequency 1.12 1.40 1.68 MHz TS1 Start-Up Time From Enable-1 to Output-1 Regulation 150 μs Channel 2: 800mA Step-Down Converter VP2, VCC2 Input Voltage 2.7 5.5 V VUVLO2 UVLO Threshold VP2 Rising 2.7 V VP2 Hysteresis 100 mV VP2 Falling 1.7 V VOUT2 Output Voltage Range 0.6 VP2 V VOUT2(TOL) Output Voltage Tolerance IOUT2 = 0A to 800mA, VP2 = 2.7V to 5.5V -3.0 3.0 % IQ2 Quiescent Current No load, VEN2 = VP2, VEN1 = AGND 37 70 μA ISHDN2 Shutdown Current VEN2 = GND 1.0 μA ILIM2 Current Limit 900 mA RDSON(H)2 High Side On-Resistance 330 mΩ RDSON(L)2 Low Side On-Resistance 275 mΩ ΔVLOADREG2 Load Regulation IOUT2= 0mA to 800mA 0.5 % ΔVLINEREG2 / ΔVP2 Line Regulation VP2 = 2.7V to 5.5V 0.1 %/V FOSC2 Oscillator Frequency 0.9 2.0 2.6 MHz TS2 Start-Up Time From Enable-2 to Output-2 Regulation 150 μs Over-Temperature, EN Logic TSD1,2 Over-Temperature Shutdown Threshold 140 °C Over-Temperature Shutdown Hysteresis 15 °C VEN1,2(L) Enable Threshold Low 0.6 V VEN1,2(H) Enable Threshold High 1.4 V IEN(1,2 Input Low Current -1.0 1.0 μA 1. The AAT2789 is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range, and is assured by design, characterization and correla- tion with statistical process controls. |
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