ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474
Data Sheet
ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/15 V SECONDARY ISOLATED SUPPLY
4.5 V ≤ VDD1 = VDDA ≤ 5.5 V; VREG = VISO = 15 V; VDD2 = 5.0 V; fSW = 500 kHz; all voltages are relative to their respective grounds; see the
application schematic in Figure 49. All minimum/maximum specifications apply over the entire recommended operating range, unless
otherwise noted. All typical specifications are at TA = 25°C, VDD1 = VDDA = 5.0 V, VREG = VISO = 15 V, VDD2 = 5.0 V.
Table 4. DC-to-DC Converter Static Specifications
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
DC-TO-DC CONVERTER SUPPLY
Isolated Output Voltage
VISO
VFB
13.8
1.15
15
16.2
1.37
V
V
IISO = 0 mA,
VISO = VFB × (R1 + R2)/R2
IISO = 0 mA
Feedback Voltage Setpoint
VDD2 Linear Regulator
Regulator Voltage
1.25
4.5
5.0
5.5
V
VREG = 7 V to 15 V,
IDD2 = 0 mA to 50 mA
Dropout Voltage
Line Regulation
0.5
1
1.5
20
IDD2 = 50 mA
VISO (LINE)
mV/V
IISO = 50 mA,
VDD1 1 = VDDA2 = 4.5 V to 5.5 V
Load Regulation
Output Ripple
VISO (LOAD)
VISO (RIP)
1
200
3
%
mV p-p
IISO = 20 mA to 80 mA
20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
Output Noise
VISO (NOISE)
fSW
500
mV p-p
20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
ROC = 50 kΩ
ROC = 270 kΩ
Switching Frequency
1000
200
318
0.5
kHz
kHz
kHz
Ω
192
100
515
VOC = VDD2 (open-loop)
Switch On-Resistance
Undervoltage Lockout, VDDA, VDD2 Supplies
Positive Going Threshold
Negative Going Threshold
Hysteresis
DC to 2 Mbps Data Rate3
Maximum Output Supply Current4
Efficiency at Maximum Output Current5
iCoupler DATA CHANNELS
DC to 2 Mbps Data Rate
IDD1 Supply Current, No VISO Load
ADuM4470
RON
VUV+
VUV−
VUVH
2.8
2.6
0.2
V
V
V
IISO (MAX)
mA
%
f ≤ 1 MHz, VISO = 5.0 V
IISO = IISO (MAX), f ≤ 1 MHz
78
IDD1 (Q)
IISO = 0 mA, f ≤ 1 MHz
25
27
29
31
33
45
45
45
45
45
mA
mA
mA
mA
mA
ADuM4471
ADuM4472
ADuM4473
ADuM4474
25 Mbps Data Rate (CRIZ Grade Only)
IDD1 Supply Current, No VISO Load
ADuM4470
IDD1 (D)
73
83
93
102
112
mA
mA
mA
mA
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
fSW = 500 kHz
CL = 15 pF, f = 12.5 MHz
CL = 15 pF, f = 12.5 MHz
CL = 15 pF, f = 12.5 MHz
CL = 15 pF, f = 12.5 MHz
ADuM4471
ADuM4472
ADuM4473
ADuM4474
Available VISO Supply Current6
ADuM4470
ADuM4471
ADuM4472
IISO (LOAD)
91
89
86
83
80
425
mA
mA
mA
mA
mA
mA
ADuM4473
ADuM4474
IDD1 Supply Current, Full VISO Load
CL = 15 pF, f = 12.5 MHz
CL = 0 pF, f = 0 MHz, VDD1 = VDDA
5 V, IISO = 400 mA
=
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