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PDF ADUM4070 Data sheet ( Hoja de datos )
| Número de pieza | ADUM4070 | |
| Descripción | Isolated Switching Regulator | |
| Fabricantes | Analog Devices | |
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Data Sheet
Isolated Switching Regulator
with Integrated Feedback
ADuM4070
FEATURES
Isolated PWM feedback with built-in compensation
Primary side transformer driver for up to 2.5 W output power
with 5 V input voltage
Regulated adjustable output: 3.3 V to 24 V
Up to 70% efficiency
200 kHz to 1 MHz adjustable oscillator
Soft start function at power-up
Pulse-by-pulse overcurrent protection
Thermal shutdown
5000 V rms isolation
High common-mode transient immunity: >25 kV/μs
16-lead SOIC package with 8.3 mm creepage
High temperature operation: 105°C maximum
Safety and regulatory approvals (pending)
UL recognition: 5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 849 V peak
APPLICATIONS
Power supply start-up bias and gate drives
Isolated sensor interfaces
Process controls
VDD1
VDDA
FUNCTIONAL BLOCK DIAGRAM
X1 X2
RECTIFIER
VREG
VISO
ADuM4070
REGULATOR
PRIMARY
CONTROLLER/
DRIVER
SECONDARY
CONTROLLER
INTERNAL
FEEDBACK
VDD2
5V
FB
OC
GND1
GND2
Figure 1.
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GENERAL DESCRIPTION
The ADuM40701 is a regulated dc-to-dc isolated power supply
controller with an internal MOSFET driver. The dc-to-dc controller
has internal isolated PWM feedback from the secondary side based
on the iCoupler® chip scale transformer technology and complete
loop compensation. This architecture eliminates the need to use
an optocoupler for feedback and compensates the loop for stability.
The ADuM4070 isolator provides a more stable output voltage and
higher efficiency compared to unregulated isolated dc-to-dc power
supplies. The fully integrated feedback and loop compensation
in a wide-body SOIC package provide a solution with a smaller
form factor and 8.3 mm creepage distance.
The regulated feedback provides a relatively flat efficiency curve
over the full output power range. The ADuM4070 enables a dc-to-
dc converter with a 3.3 V to 24 V isolated output voltage range
from either a 5.0 V or a 3.3 V input voltage, with an output power
of up to 2.5 W.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
Data Sheet
ADuM4070
PACKAGE CHARACTERISTICS
Table 5.
Parameter
RESISTANCE AND CAPACITANCE
Resistance (Input to Output)1
Capacitance (Input to Output)1
IC Junction to Ambient Thermal
Resistance
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Symbol Min
RI-O
CI-O
θJA
Typ
1012
2.2
45
TSSD
TSSD-HYS
150
20
Max Unit
Ω
pF
°C/W
°C
°C
Test Conditions/Comments
f = 1 MHz
Thermocouple is located at the center of
the package underside; test conducted
on a 4-layer board with thin traces2
TJ rising
1 The device is considered a 2-terminal device: Pin 1 to Pin 8 are shorted together, and Pin 9 to Pin 16 are shorted together.
2 See the Thermal Analysis section for thermal model definitions.
REGULATORY APPROVALS (PENDING)
The ADuM4070 is pending approval by the organizations listed in Table 6. For more information about the recommended maximum
working voltages for specific cross-insulation waveforms and insulation levels, see Table 11 and the Insulation Lifetime section.
Table 6.
UL 1
Recognized under UL 1577 component
recognition program
Single protection, 5000 V rms isolation
voltage
File E214100
CSA
Approved under CSA Component Acceptance Notice #5A
Basic insulation per CSA 60950-1-03 and IEC 60950-1,
600 V rms (848 V peak) maximum working voltage
Reinforced insulation per CSA 60950-1-03 and IEC 60950-1,
400 V rms (565 V peak) maximum working voltage
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Reinforced insulation per IEC 60601-1, 250 V rms (353 V peak)
maximum working voltage
File 205078
VDE2
Certified according to DIN V VDE V
0884-10 (VDE V 0884-10):2006-12
Reinforced insulation, 849 V peak
File 2471900-4880-0001
1 In accordance with UL 1577, each ADuM4070 is proof tested by applying an insulation test voltage ≥ 6000 V rms for 1 sec (current leakage detection limit = 10 µA).
2 In accordance with DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, each ADuM4070 is proof tested by applying an insulation test voltage ≥ 1050 V peak for 1 sec
(partial discharge detection limit = 5 pC). The asterisk (*) marking branded on the component designates DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval.
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 7.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Symbol
L(I01)
Value
5000
>8.0
Unit
V rms
mm
Minimum External Tracking (Creepage)
L(I02) >8.3
mm
Minimum Internal Distance (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
CTI
0.017 min
>400
II
mm
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
Distance through insulation
DIN IEC 112/VDE 0303, Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
Rev. 0 | Page 5 of 20
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
Data Sheet
ADuM4070
6
5
4
3
2
1 LOAD = 10mA
LOAD = 50mA
LOAD = 500mA
0
0 5 10 15 20 25 30
TIME (ms)
Figure 15. Typical VISO Startup with 10 mA, 50 mA, and 500 mA Output Load,
5 V Input to 5 V Output
18
16
14
12
10
8
6
4
LOAD = 10mA
2 LOAD = 20mA
LOAD = 100mA
0
0 5 10 15 20 25 30
TIME (ms)
Figure 18. Typical VISO Startup with 10 mA, 20 mA, and 100 mA Output Load,
5 V Input to 15 V Output
5
4
3
2
1 LOAD = 10mA
LOAD = 50mA
LOAD = 500mA
0
0 5 10 15 20 25 30
TIME (ms)
Figure 16. Typical VISO Startup with 10 mA, 50 mA, and 500 mA Output Load,
5 V Input to 3.3 V Output
5
4
3
2
1 LOAD = 10mA
LOAD = 50mA
LOAD = 250mA
0
0 5 10 15 20 25 30
TIME (ms)
Figure 17. Typical VISO Startup with 10 mA, 50 mA, and 250 mA Output Load,
3.3 V Input to 3.3 V Output
5.75
5.25
4.75
4.25
COUT = 47µF, L1 = 47µH
5.75
5.25
4.75
4.25
COUT = 47µF, L1 = 100µH
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1.0
0.5
10% LOAD
90% LOAD
0
–2 0 2 4 6 8 10 12 14
TIME (ms)
Figure 19. Typical VISO Load Transient Response at 10% to 90% of 500 mA Load,
fSW = 500 kHz, 5 V Input to 5 V Output
5.75
5.25
COUT = 47µF, L1 = 47µH
4.75
4.25
5.75
5.25
COUT = 47µF, L1 = 100µH
4.75
4.25
1.0
10% LOAD
90% LOAD
0.5
0
–2 0 2 4 6 8 10 12 14
TIME (ms)
Figure 20. Typical VISO Load Transient Response at 10% to 90% of 500 mA Load
with 0.1 µF Feedback Capacitor, fSW = 500 kHz, 5 V Input to 5 V Output
Rev. 0 | Page 11 of 20
Datasheet pdf - http://www.DataSheet4U.co.kr/
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