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ADuM4471 データシート(PDF) 6 Page - Analog Devices

部品番号 ADuM4471
部品情報  Isolated Switching Regulator with Quad-Channel Isolators
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
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ADuM4471 データシート(HTML) 6 Page - Analog Devices

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ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474
Data Sheet
Rev. 0 | Page 6 of 36
ELECTRICAL CHARACTERISTICS—3.3 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY
3.0 V ≤ VDD1 = VDDA ≤ 3.6 V; VDD2 = VREG = VISO = 3.3 V; fSW = 500 kHz; all voltages are relative to their respective grounds; see the application
schematic in Figure 48. All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise
noted. All typical specifications are at TA = 25°C, VDD1 = VDDA = 3.3 V, VDD2 = VREG = VISO = 3.3 V.
Table 2. DC-to-DC Converter Static Specifications
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
DC-TO-DC CONVERTER SUPPLY
Isolated Output Voltage
VISO
3.0
3.3
3.6
V
IISO = 0 mA,
VISO = VFB × (R1 + R2)/R2
Feedback Voltage Setpoint
VFB
1.15
1.25
1.37
V
IISO = 0 mA
Line Regulation
VISO(LINE)
1
10
mV/V
IISO = 50 mA,
VDD11 = VDDA2 = 4.5 V to 5.5 V
Load Regulation
VISO(LOAD)
1
2
%
IISO = 50 mA to 200 mA
Output Ripple
VISO(RIP)
50
mV p-p
20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
Output Noise
VISO(NOISE)
100
mV p-p
20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
Switching Frequency
fSW
1000
kHz
ROC = 50 kΩ
200
kHz
ROC = 270 kΩ
192
318
515
kHz
VOC = VDD2 (open-loop)
Switch On-Resistance
RON
0.6
Ω
Undervoltage Lockout, VDDA, VDD2 Supplies
Positive Going Threshold
VUV+
2.8
V
Negative Going Threshold
VUV−
2.6
V
Hysteresis
VUVH
0.2
V
DC to 2 Mbps Data Rate3
Maximum Output Supply Current4
IISO (MAX)
250
mA
f ≤ 1 MHz, VISO = 5.0 V
Efficiency at Maximum Output Current5
68
%
IISO = IISO(MAX), f ≤ 1 MHz
iCoupler DATA CHANNELS
DC to 2 Mbps Data Rate
IDD1 Supply Current, No VISO Load
IDD1(Q)
IISO = 0 mA, f ≤ 1MHz
ADuM4470
9
20
mA
ADuM4471
10
20
mA
ADuM4472
11
20
mA
ADuM4473
11
20
mA
ADuM4474
12
20
mA
25 Mbps Data Rate (CRIZ Grade Only)
IDD1 Supply Current, No VISO Load
IDD1(D)
ADuM4470
28
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
ADuM4471
29
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
ADuM4472
31
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
ADuM4473
32
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
ADuM4474
34
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
Available VISO Supply Current6
IISO (LOAD)
fSW = 500 kHz
ADuM4470
244
mA
CL = 15 pF, f = 12.5 MHz
ADuM4471
243
mA
CL = 15 pF, f = 12.5 MHz
ADuM4472
241
mA
CL = 15 pF, f = 12.5 MHz
ADuM4473
240
mA
CL = 15 pF, f = 12.5 MHz
ADuM4474
238
mA
CL = 15 pF, f = 12.5 MHz
IDD1 Supply Current, Full VISO Load
350
mA
CL = 0 pF, f = 0 MHz, VDD1 = VDDA = 5 V,
IISO = 400 mA
I/O Input Currents
IIA, IIB, IIC, IID
−10
+0.01
+10
µA
Logic High Input Threshold
VIH
1.6
V
Logic Low Input Threshold
VIL
0.4
V


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