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AAT2856 Datasheet(PDF) 4 Page - Advanced Analogic Technologies |
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AAT2856 Datasheet(HTML) 4 Page - Advanced Analogic Technologies |
4 / 18 page AAT2856 High Current Charge Pump with Dual LDO for Backlight Applications ChargePumpTM PRODUCT DATASHEET 4 2856.2008.02.1.3 www .analogictech.com AAT2856 High Current Charge Pump with Dual LDO for Backlight Applications ChargePumpTM PRODUCT DATASHEET 4 2856.2008.02.1.3 www .analogictech.com Electrical Characteristics1 VIN = 3.6V; CIN = 4.7μF; COUT = 2.2μF; C1 = C2 = 1μF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol Description Conditions Min Typ Max Units VIN IN Operating Voltage Range 2.7 5.5 V IIN(Q) IN Operating Current 1X Mode, 3.0V ≤ VIN ≤ 5.5V, Active, No Load; ENL = AGND, ENS = IN 0.63 1 mA 1.5X Mode, 3.0V ≤ VIN ≤ 5.5V, Active, No Load; ENL = AGND, ENS = IN 1.4 4 2X Mode, 3.0V ≤ VIN ≤ 5.5V, Active, No Load; ENL = AGND, ENS = IN 2.6 5 IIN(SHDN) IN Shutdown Current ENA = ENB = ENS = AGND 1.0 μA TSD Over-Temperature Shutdown Threshold 140 °C TSD(HYS) Over-Temperature Shutdown Hysteresis 15 °C Charge Pump Section IOUT OUT Maximum Output Current 200 mA VIN(TH_H) Charge Pump Mode Hysteresis Address 0, Data 1 500 mV fOSC Charge Pump Oscillator Frequency TA = 25°C 2 MHz BL1-BL6 Backlight LED Outputs IBL_(MAX) BL1-BL6 Maximum Current Address 0, Data 1; VIN - VF = 1.5V 18 20 22 mA Address 12, Data 2; VIN - VF = 1.5V 30 ΔI(BL_) BL1-BL6 Current Matching2 Address 0, Data 1; VIN - VF = 1.5V 1.0 % VBL_(TH) BL1-BL6 Charge Pump Mode Transition Threshold 150 mV ENS Logic Control VENS(L) ENS Input Low Threshold 0.4 V VENS(H) ENS Input High Threshold 1.4 V IENS ENS Input Leakage Current VENS = VIN = 5V -1.0 1.0 μA tENS(LOW) ENS Serial Interface Low Time VIN ≥ 3.3V 0.3 75 μs tENS(HI_MIN), tENS(HI_MIN) ENS Serial Interface Minimum High Time 50 ns tENS(HI_MAX), tENS(HI_MAX) ENS Serial Interface Maximum High Time VIN ≥ 3.3V 75 μs tENS(OFF) ENS Off Timeout 500 μs tENS(LAT) ENS Serial Interface Latch Timeout 500 μs Linear Regulators VFBA, VFBB Output Voltage Tolerance IOUT = 1mA to 200mA 1.17 1.2 1.23 V ENA = ENB = IN, ENS = AGND 125 200 IIN Ground Pin Current ENA = IN, ENB = AGND or ENA = AGND, ENB = IN, ENS = AGND 90 150 μA IOUTA(MAX), IOUTB(MAX) OUTA, OUTB Maximum Load Current 200 mA VOUTA(DO), VOUTB(DO) OUTA, OUTB Dropout Voltage IOUT = 150mA 150 300 mV PSRRA, PSRRB OUTA, OUTB Power Supply Rejection Ratio IOUT = 10mA, CREF = 10nF, 1kHz 50 dB VEN_(L) ENA, ENB Voltage Low Threshold 0.4 V VEN_(H) ENA, ENB Voltage High Threshold 1.4 V tEN_(DLY) ENA, ENB Enable Delay REF = Open 15 μs 1. The AAT2856 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. 2. Current matching is defined as the deviation of any sink current from the average of all active channels. |
Similar Part No. - AAT2856_08 |
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Similar Description - AAT2856_08 |
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