ADUM4470 Просмотр технического описания (PDF) - Analog Devices
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ADUM4470 Datasheet PDF : 36 Pages
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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
DC-TO-DC CONVERTER SUPPLY
Isolated Output Voltage
VISO
13.8
Feedback Voltage Setpoint
VDD2 Linear Regulator
Regulator Voltage
VFB
1.15
4.5
Dropout Voltage
Line Regulation
Load Regulation
Output Ripple
Output Noise
Switching Frequency
VISO (LINE)
VISO (LOAD)
VISO (RIP)
VISO (NOISE)
fSW
192
Switch On-Resistance
RON
Undervoltage Lockout, VDDA, VDD2 Supplies
Positive Going Threshold
VUV+
Negative Going Threshold
VUV−
Hysteresis
VUVH
DC to 2 Mbps Data Rate3
Maximum Output Supply Current4
IISO (MAX)
100
Efficiency at Maximum Output Current5
iCoupler DATA CHANNELS
DC to 2 Mbps Data Rate
IDD1 Supply Current, No VISO Load
ADuM4470
IDD1 (Q)
ADuM4471
ADuM4472
ADuM4473
ADuM4474
25 Mbps Data Rate (CRIZ Grade Only)
IDD1 Supply Current, No VISO Load
ADuM4470
IDD1 (D)
ADuM4471
ADuM4472
ADuM4473
ADuM4474
Available VISO Supply Current6
ADuM4470
IISO (LOAD)
ADuM4471
ADuM4472
ADuM4473
ADuM4474
IDD1 Supply Current, Full VISO Load
Typ
15
1.25
5.0
0.5
1
1
200
500
1000
200
318
0.5
2.8
2.6
0.2
78
Max Unit
Test Conditions/Comments
16.2 V
1.37 V
IISO = 0 mA,
VISO = VFB × (R1 + R2)/R2
IISO = 0 mA
5.5 V
VREG = 7 V to 15 V,
IDD2 = 0 mA to 50 mA
1.5
IDD2 = 50 mA
20
mV/V
IISO = 50 mA,
VDD11 = VDDA2 = 4.5 V to 5.5 V
3
%
IISO = 20 mA to 80 mA
mV p-p 20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
mV p-p 20 MHz bandwidth,
COUT = 0.1 µF||47 µF, IISO = 100 mA
kHz
ROC = 50 kΩ
kHz
ROC = 270 kΩ
515 kHz
VOC = VDD2 (open-loop)
Ω
V
V
V
mA
f ≤ 1 MHz, VISO = 5.0 V
%
IISO = IISO , (MAX) f ≤ 1 MHz
25
45
mA
27
45
mA
29
45
mA
31
45
mA
33
45
mA
IISO = 0 mA, f ≤ 1 MHz
73
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
83
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
93
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
102
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
112
mA
IISO = 0 mA, CL = 15 pF, f = 12.5 MHz
fSW = 500 kHz
91
mA
CL = 15 pF, f = 12.5 MHz
89
mA
CL = 15 pF, f = 12.5 MHz
86
mA
CL = 15 pF, f = 12.5 MHz
83
mA
CL = 15 pF, f = 12.5 MHz
80
mA
CL = 15 pF, f = 12.5 MHz
425
mA
CL = 0 pF, f = 0 MHz, VDD1 = VDDA =
5 V, IISO = 400 mA
Rev. 0 | Page 10 of 36
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