Data Sheet
FEATURES
isoPower
integrated, isolated dc-to-dc converter
100 mA output current for ADuM5020
60 mA output current for ADuM5028
Meets CISPR22 Class B emissions limits at full load on a
2-layer PCB
16-lead SOIC_W package with 7.8 mm minimum creepage
8-lead SOIC_IC package with 8.3 mm minimum creepage
High temperature operation: 125°C maximum
Safety and regulatory approvals
UL recognition (pending)
3000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A (pending)
VDE certificate of conformity (pending)
VDE V 0884-10
V
IORM
= 565 V peak
CQC certification per GB4943.1-2011
Low Emission,
Isolated DC-to-DC Converters
ADuM5020/ADuM5028
FUNCTIONAL BLOCK DIAGRAMS
NIC
1
GND
1 2
PDIS
3
GND
1 4
V
DDP 5
GND
1 6
NIC
7
GND
1 8
OSC
RECT
REG
PCS
ADuM5020
16
NIC
15
GND
ISO
14
V
SEL
13
GND
ISO
12
V
ISO
11
GND
ISO
10
NIC
16520-001
9
GND
ISO
NIC = NO INTERNAL CONNECTION. LEAVE THIS PIN FLOATING.
Figure 1. ADuM5020 Functional Block Diagram
ADuM5028
PDIS
1
GND
1 2
V
DDP 3
GND
1 4
OSC
RECT
REG
PCS
8
7
6
5
V
SEL
GND
ISO
16520-102
APPLICATIONS
RS-485/RS-422/CAN transceiver power
Power supply start-up bias and gate drives
Isolated sensor interfaces
Industrial PLCs
V
ISO
GND
ISO
Figure 2. ADuM5028 Functional Block Diagram
GENERAL DESCRIPTION
The ADuM5020 and ADuM5028
1
are
isoPower®,
integrated,
isolated dc-to-dc converters. Based on the Analog Devices, Inc.,
iCoupler®
technology, these dc-to-dc converters provide
regulated, isolated power that is below CISPR22 Class B limits at
full load on a 2-layer printed circuit board (PCB) with ferrites.
Common voltage combinations and the associated current
output levels are shown in Table 1 through Table 4.
The ADuM5020 and ADuM5028 eliminate the need to design
and build isolated dc-to-dc converters in applications up to
500 mW. The
iCoupler
chip scale transformer technology is used
for the magnetic components of the dc-to-dc converter. The
result is a small form factor, isolated solution.
The ADuM5020 and ADuM5028 isolated dc-to-dc converters
provide two different package variants: the ADuM5020 in a
wide body, 16-lead SOIC_W package, and the ADuM5028 in
the space saving, 8-lead, wide body SOIC_IC. See the Pin
Configuration and Function Descriptions section and the
Ordering Guide for more information.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.
Rev. 0
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ADuM5020/ADuM5028
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagrams ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—5 V Primary Input Supply/5 V
Secondary Isolated Supply........................................................... 3
Electrical Characteristics—5 V Primary Input Supply/3.3 V
Secondary Isolated Supply........................................................... 4
Regulatory Approvals................................................................... 5
Insulation and Safety Related Specifications ............................ 5
Package Characteristics ............................................................... 6
DIN V VDE V 0884-10 (VDE V 0884-10) Insulation
Characteristics .............................................................................. 6
Recommended Operating Conditions ...................................... 8
Data Sheet
Absolute Maximum Ratings ............................................................9
ESD Caution...................................................................................9
Pin Configuration and Function Descriptions........................... 10
Truth Table .................................................................................. 10
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 14
Applications Information .............................................................. 15
PCB Layout ................................................................................. 15
Thermal Analysis ....................................................................... 16
EMI Considerations ................................................................... 16
Insulation Lifetime ..................................................................... 16
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 18
REVISION HISTORY
6/2018—Revision 0: Initial Version
Rev. 0 | Page 2 of 18
Data Sheet
SPECIFICATIONS
ADuM5020/ADuM5028
ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/5 V SECONDARY ISOLATED SUPPLY
All typical specifications are at T
A
= 25°C, V
DDP
= V
ISO
= 5 V. Minimum and maximum specifications apply over the entire recommended
operation range, which is 4.5 V ≤ V
DDP
≤ 5.5 V, 4.5 V ≤ V
ISO
≤ 5.5 V, and −40°C ≤ T
A
≤ +125°C, unless otherwise noted.
Table 1. ADuM5020 DC-to-DC Converter Static Specifications
Parameter
DC-TO-DC CONVERTER SUPPLY
Setpoint
Line Regulation
Load Regulation
1
Output Ripple
1
Output Noise
1
Switching Frequency
Pulse-Width Modulation (PWM)
Frequency
Output Supply Current
1
Efficiency at I
ISO (MAX)1
V
DDP
Supply Current
No V
ISO
Load
Full V
ISO
Load
Thermal Shutdown
Shutdown Temperature
Thermal Hysteresis
1
Symbol
V
ISO
V
ISO (LINE)
V
ISO (LOAD)
V
ISO (RIP)
V
ISO (NOISE)
f
OSC
f
PWM
I
ISO (MAX)
Min
4.75
Typ
5.0
2
1
75
200
180
625
Max
5.25
5
Unit
V
mV/V
%
mV p-p
mV p-p
MHz
kHz
mA
mA
%
Test Conditions/Comments
V
ISO
output current (I
ISO
) = 10 mA
I
ISO
= 50 mA, V
DDP
= 4.5 V to 5.5 V
I
ISO
= 10 mA to 90 mA
20 MHz bandwidth, bypass output capacitance (C
BO
) =
0.1 µF||10 µF, I
ISO
= 90 mA
C
BO
= 0.1 µF||10 µF, I
ISO
= 90 mA
50
100
33
4.75 V < V
ISO
< 5.25 V
4.5 V < V
ISO
< 5.25 V
I
ISO
= 100 mA
I
DDP (Q)
I
DDP (MAX)
8
310
154
10
25
mA
mA
°C
°C
Maximum V
ISO
output current is derated by 1.75 mA/ºC for T
A
> 85ºC.
Table 2. ADuM5028 DC-to-DC Converter Static Specifications
Parameter
DC-TO-DC CONVERTER SUPPLY
Setpoint
Line Regulation
Load Regulation
1
Output Ripple
1
Output Noise
1
Switching Frequency
PWM Frequency
Output Supply Current
1
Efficiency at I
ISO (MAX) 1
V
DDP
Supply Current
No V
ISO
Load
Full V
ISO
Load
Thermal Shutdown
Shutdown Temperature
Thermal Hysteresis
1
Symbol
V
ISO
V
ISO (LINE)
V
ISO (LOAD)
V
ISO (RIP)
V
ISO (NOISE)
f
OSC
f
PWM
I
ISO (MAX)
Min
4.75
Typ
5.0
2
1
75
200
180
625
33
Max
5.25
5
Unit
V
mV/V
%
mV p-p
mV p-p
MHz
kHz
mA
%
mA
mA
°C
°C
Test Conditions/Comments
I
ISO
= 10 mA
I
ISO
= 30 mA, V
DDP
= 4.5 V to 5.5 V
I
ISO
= 10 mA to 54 mA
20 MHz bandwidth, C
BO
= 0.1 µF||10 µF, I
ISO
= 54 mA
C
BO
= 0.1 µF||10 µF, I
ISO
= 54 mA
60
4.75 V < V
ISO
< 5.25 V
I
ISO
= 60 mA
I
DDP (Q)
I
DDP (MAX)
8
310
154
10
25
Maximum V
ISO
output current is derated by 1 mA/ºC for T
A
> 85ºC.
Rev. 0 | Page 3 of 18
ADuM5020/ADuM5028
Data Sheet
ELECTRICAL CHARACTERISTICS—5 V PRIMARY INPUT SUPPLY/3.3 V SECONDARY ISOLATED SUPPLY
All typical specifications are at T
A
= 25°C, V
DDP
= 5.0 V, V
ISO
= 3.3 V. Minimum/maximum specifications apply over the entire
recommended operation range, which is 4.5 V ≤ V
DDP
≤ 5.5 V, 3.0 V ≤ V
ISO
≤ 3.6 V, and −40°C ≤ T
A
≤ +125°C, unless otherwise noted.
Table 3. ADuM5020 DC-to-DC Converter Static Specifications
Parameter
DC-TO-DC CONVERTER SUPPLY
Setpoint
Line Regulation
Load Regulation
1
Output Ripple
1
Output Noise
1
Switching Frequency
PWM Frequency
Output Supply Current
1
Efficiency at I
ISO (MAX)1
V
DDP
Supply Current
No V
ISO
Load
Full V
ISO
Load
Thermal Shutdown
Shutdown Temperature
Thermal Hysteresis
1
Symbol
V
ISO
V
ISO (LINE)
V
ISO (LOAD)
V
ISO (RIP)
V
ISO (NOISE)
f
OSC
f
PWM
I
ISO (MAX)
Min
3.135
Typ
3.3
2
1
50
130
180
625
Max
3.465
5
Unit
V
mV/V
%
mV p-p
mV p-p
MHz
kHz
mA
mA
%
mA
mA
°C
°C
Test Conditions/Comments
I
ISO
= 10 mA
I
ISO
= 50 mA, V
DDP
= 3.0 V to 3.6 V
I
ISO
= 10 mA to 90 mA
20 MHz bandwidth, C
BO
= 0.1 µF||10 µF, I
ISO
= 90 mA
C
BO
= 0.1 µF||10 µF, I
ISO
= 90 mA
50
100
27
3.135 V < V
ISO
< 3.465 V
3.0 V < V
ISO
< 3.465 V
I
ISO
= 100 mA
I
DDP (Q)
I
DDP (MAX)
5
250
154
10
18
Maximum V
ISO
output current is derated by 1.75 mA/ºC for T
A
> 85ºC.
Table 4. ADuM5028 DC-to-DC Converter Static Specifications
Parameter
DC-TO-DC CONVERTER SUPPLY
Setpoint
Line Regulation
Load Regulation
1
Output Ripple
1
Output Noise
1
Switching Frequency
PWM Frequency
Output Supply Current
1
Efficiency at I
ISO (MAX) 1
V
DDP
Supply Current
No V
ISO
Load
Full V
ISO
Load
Thermal Shutdown
Shutdown Temperature
Thermal Hysteresis
1
Symbol
V
ISO
V
ISO (LINE)
V
ISO (LOAD)
V
ISO (RIP)
V
ISO (NOISE)
f
OSC
f
PWM
I
ISO (MAX)
Min
3.135
Typ
3.3
2
1
50
130
180
625
27
Max
3.465
5
Unit
V
mV/V
%
mV p-p
mV p-p
MHz
kHz
mA
%
mA
mA
°C
°C
Test Conditions/Comments
I
ISO
= 10 mA
I
ISO
= 30 mA, V
DDP
= 3.0 V to 3.6 V
I
ISO
= 10 mA to 54 mA
20 MHz bandwidth, C
BO
= 0.1 µF||10 µF, I
ISO
= 54 mA
C
BO
= 0.1 µF||10 µF, I
ISO
= 54 mA
60
3.135 V < V
ISO
< 3.465 V
I
ISO
= 60 mA
I
DDP (Q)
I
DDP (MAX)
5
250
154
10
18
Maximum V
ISO
output current is derated by 1 mA/ºC for T
A
> 85ºC.
Rev. 0 | Page 4 of 18
Data Sheet
REGULATORY APPROVALS
Table 5.
UL (Pending)
1
Recognized Under 1577 Component
Recognition Program
1
Single Protection, 3000 V rms
Isolation Voltage
CSA (Pending)
Approved under CSA Component
Acceptance Notice 5A
CSA 60950-1-07+A1+A2 and
IEC 60950-1, second edition, +A1+A2
Basic insulation at 780 V rms
(1103 V peak)
Reinforced insulation at 390 V rms
(552 V peak)
IEC 60601-1 Edition 3.1:
Basic insulation (1 means of patient
protection (1 MOPP)), 585 V rms
(827 V peak)
CSA 61010-1-12 and IEC 61010-1 third
edition:
Basic insulation at 300 V rms mains,
780 V rms (1103 V peak)
Reinforced insulation at 300 V rms
mains, 390 V rms (552 V peak)
File 205078
ADuM5020/ADuM5028
VDE (Pending)
2
DIN V VDE V 0884-10
(VDE V 0884-10):2006-12
Reinforced insulation
565 V peak, surge isolation
voltage (V
IOSM
) =
6000 V peak
Transient voltage (V
IOTM
) =
4242 V peak
CQC (Pending)
Certified under
CQC11-471543-2012
GB4943.1-2011:
Basic insulation at 780 V rms
(1103 V peak)
Reinforced insulation at
390 V rms (552 V peak)
File E214100
1
2
File 2471900-4880-0001
File (pending)
In accordance with UL 1577, each ADuM5020 and ADuM5028 are proof tested by applying an insulation test voltage ≥ 3600 V rms for 1 sec.
In accordance with DIN V VDE V 0884-10, each ADuM5020 and ADuM5028 are proof tested by applying an insulation test voltage ≥ 1059 V peak for 1 sec (partial
discharge detection limit = 5 pC). The * marking branded on the component designates DIN V VDE V 0884-10 approval.
INSULATION AND SAFETY RELATED SPECIFICATIONS
For additional information, see
www.analog.com/icouplersafety.
Table 6. ADuM5020 Insulation and Safety
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Minimum External Tracking (Creepage)
Minimum Clearance in the Plane of the Printed
Circuit Board (PCB Clearance)
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Material Group
Symbol
L (I01)
L (I02)
L (PCB)
Value
3000
7.8
7.8
8.3
25.5
>600
I
Unit
V rms
mm min
mm min
mm min
μm min
V
Test Conditions/Comments
1-minute duration
Measured from input terminals to output terminals,
shortest distance through air
Measured from input terminals to output terminals,
shortest distance path along body
Measured from input terminals to output terminals,
shortest distance through air, line of sight, in the PCB
mounting plane
Insulation distance through insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
CTI
Table 7. ADuM5028 Insulation and Safety
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Minimum External Tracking (Creepage)
Minimum Clearance in the Plane of the Printed
Circuit Board (PCB Clearance)
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Material Group
Symbol
L (I01)
L (I02)
L (PCB)
Value
3000
8.3
8.3
8.3
25.5
>600
I
Unit
V rms
mm min
mm min
mm min
μm min
V
Test Conditions/Comments
1-minute duration
Measured from input terminals to output terminals,
shortest distance through air
Measured from input terminals to output terminals,
shortest distance path along body
Measured from input terminals to output terminals,
shortest distance through air, line of sight, in the PCB
mounting plane
Insulation distance through insulation
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
CTI
Rev. 0 | Page 5 of 18
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