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ADuM5401W/ADuM5402W/ADuM5403W
Data Sheet
V DD1 1
GND 1 2
16
15
V ISO
GND ISO
V IA 3
ADuM5403W
14
V OA
V OB 4
TOP VIEW
13 V IB
V OC 5
(Not to Scale) 12 V IC
V OD 6
RC OUT 7
GND 1 8
11
10
9
V ID
V SEL
GND ISO
Figure 8. ADuM5403W Pin Configuration
Table 23. ADuM5403W Pin Function Descriptions
Pin No.
1
2, 8
3
4
5
6
7
9, 15
10
11
12
13
14
16
Mnemonic
V DD1
GND 1
V IA
V OB
V OC
V OD
RC OUT
GND ISO
V SEL
V ID
V IC
V IB
V OA
V ISO
Description
Primary Supply Voltage, 3.0 V to 5.5 V.
Ground Reference for the Primary Side of the Isolator. Pin 2 and Pin 8 are internally connected to each other, and it
is recommended that both pins be connected to a common ground.
Logic Input A.
Logic Output B.
Logic Output C.
Logic Output D.
Regulation Control Output. This pin is connected to the RC IN pin of a slave iso Power device to allow the ADuM5403W
to control the regulation of the slave device.
Ground Reference for the Secondary Side of the Isolator. Pin 9 and Pin 15 are internally connected to each other,
and it is recommended that both pins be connected to a common ground.
Output Voltage Selection. When V SEL = V ISO , the V ISO setpoint is 5.0 V. When V SEL = GND ISO , the V ISO setpoint is 3.3 V.
Logic Input D.
Logic Input C.
Logic Input B.
Logic Output A.
Secondary Supply Voltage Output for External Loads: 3.3 V (V SEL = GND ISO ) or 5.0 V (V SEL = V ISO ).
TRUTH TABLE
Table 24. T ruth Table (Positive Logic)
V SEL
High
Low
Low
High
RC OUT 1
PWM
PWM
PWM
PWM
V DD1 (V)
5
5
3.3
3.3
V ISO (V)
5
3.3
3.3
5
Notes
Master mode, normal operation
Master mode, normal operation
Master mode, normal operation
This supply configuration is not recommended due to extremely poor efficiency
1
PWM refers to the regulation control signal. This signal is derived from the secondary side regulator and can be used to control other iso Power devices.
Rev. D | Page 14 of 24
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