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ADP3408 Datasheet(PDF) 3 Page - Analog Devices |
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ADP3408 Datasheet(HTML) 3 Page - Analog Devices |
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3 / 16 page  REV. 0 –3– ADP3408 Parameter Symbol Condition Min Typ Max Unit RTC LDO REAL-TIME CLOCK LDO/ COIN CELL CHARGER (VRTC) Maximum Output Voltage ADP3408ARU-2.5 VRTC 1 µA ≤ ILOAD ≤ 10 µA 2.39 2.45 2.51 V ADP3408ARU-1.8 VRTC 1 µA ≤ ILOAD ≤ 10 µA 1.80 1.95 2.1 V Off Reverse Input Current IL VBAT = 2.15 V, TA = 25 °C 0.5 µA Output Capacitor Required for Stability CO 0.1 µF ANALOG LDO (VAN) Output Voltage VAN Line, Load, Temp 2.40 2.45 2.50 V Line Regulation ∆VAN Min Load 2 mV Load Regulation ∆VAN 50 µA ≤ ILOAD ≤ 130 mA, 8 mV VBAT = 3.6 V Output Capacitor Required for Stability CO 2.2 µF Ripple Rejection ∆VBAT/ f = 217 Hz 65 dB ∆VAN3 VBAT = 3.6 V Output Noise Voltage VNOISE f = 10 Hz to 100 kHz 80 µV rms ILOAD = 130 mA VBAT = 3.6 V TCXO LDO (VTCXO) Output Voltage VTCXO Line, Load, Temp 2.66 2.715 2.77 V Line Regulation ∆VTCXO Min Load 2 mV Load Regulation ∆VTCXO 50 µA ≤ ILOAD ≤ 20 mA, 1 mV VBAT = 3.6 V Output Capacitor Required for Stability CO 0.22 µF Dropout Voltage VDO VO = VINITIAL – 100 mV 160 310 mV ILOAD = 20 mA Ripple Rejection ∆VBAT/ f = 217 Hz 65 dB ∆VTCXO VBAT = 3.6 V Output Noise Voltage VNOISE f = 10 Hz to 100 kHz 80 µV rms ILOAD = 20 mA, VBAT = 3.6 V MEMORY LDO (VMEM) Output Voltage VMEM Line, Load, Temp 2.744 2.80 2.856 V Line Regulation ∆VMEM Min Load 2mV Load Regulation ∆VMEM 50 µA < I LOAD < 60 mA, 3 mV VBAT = 3.6 V mV Output Capacitor Required for Stability CO 2.2 µF Dropout Voltage 80 180 mV REFOUT Output Voltage VREFOUT Line, Load, Temp 1.19 1.210 1.23 V Line Regulation ∆VREFOUT Min Load 0.2 mV Load Regulation ∆VREFOUT 0 µA < I LOAD < 50 µA 0.5 mV VBAT = 3.6 V Ripple Rejection ∆VBAT/ f = 217 Hz 65 75 dB ∆VREFOUT VBAT = 3.6 V, ILOAD = 50 µA Maximum Capacitive Load CO 100 pF Output Noise Voltage VNOISE f = 10 Hz to 100 kHz, 40 µV rms VBAT = 3.6 V RESET GENERATOR (RESET) Output High Voltage VOH IOH = 500 µAVMEM – 0.25 V Output Low Voltage VOL IOL = –500 µA 0.25 V Output Current IOL/IOH VOL = 0.25 V, 1 mA VOH = VMEM – 0.25 V Delay Time per Unit Capacitance TD 0.6 1.2 2.4 ms/nF Applied to RESCAP Pin BATTERY VOLTAGE DIVIDER Divider Ratio BATSNS/MVBAT TCXOEN = High 2.32 2.35 2.37 k Ω Divider Impedance at MVBAT ZO 59.5 85 110 k Ω Divider Leakage Current TCXOEN = Low 1 µA Divider Resistance TCXOEN = High 215 300 385 k Ω |
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