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Analog Devices ADP1707 Evaluation Board ADP1707-3.3-EVALZ ADP1707-3.3-EVALZ Datenbogen

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EVAL-ADP1706/ADP1707/ADP1708 
 
 
Rev. 0 | Page 4 of 8 
EVALUATION BOARD CONFIGURATIONS 
The ADP1706/ADP1707/ADP1708 evaluation boards come 
supplied with different components depending on which 
version is ordered. Components common to all versions are  
C1, C2, and J1. 
ADP1706 FIXED OUTPUT WITH SOFT START 
The evaluation board supplied with the ADP1706 has the 
additional C3 soft start capacitor. This capacitor controls the 
rise time when the output voltage starts up. Figure 4 shows the 
schematic of this evaluation board configuration. 
SS
SENSE
OUT
OUT
EN
GND
IN
IN
U1
ADP1706
J1
C1
V
IN
V
OUT
C3
C2
1
2
3
4
8
7
6
5
0
69
34-
004
 
Figure 4. ADP1706 Fixed Output with Soft Start 
ADP1707 FIXED OUTPUT WITH TRACKING 
The evaluation board supplied with the ADP1707 does not have 
C3, R1, or R2 populated. The user can instead connect an 
external voltage to the SS/ADJ/TRK pad of the evaluation board  
to use the track function. Figure 5 shows the schematic of this 
evaluation board configuration. 
TRK
SENSE
OUT
OUT
EN
GND
IN
IN
U1
ADP1707
J1
C1
V
IN
V
OUT
V
TRK
C2
1
2
3
4
8
7
6
5
0
69
34-
005
 
Figure 5. ADP1707 Fixed Output with Tracking 
ADP1708 ADJUSTABLE OUTPUT 
The evaluation board supplied with the ADP1708 has addi-
tional R1 and R2 resistors to set the output voltage. Figure 6 
shows the schematic of this evaluation board configuration. 
U1
ADP1708
ADJ
SENSE
OUT
OUT
EN
GND
IN
IN
J1
C1
V
IN
V
OUT
R2
C2
R1
1
2
3
4
8
7
6
5
0
69
34-
006
 
Figure 6. ADP1708 Adjustable Output 
The output voltage is set based on the following equation: 
⎟
⎠
⎞
⎜
⎝
⎛ +
=
2
1
8
.
0
R
R1
V
V
OUT
 
For example, if R1 = 10 kΩ and R2 = 4.99 kΩ, then V
OUT
  
is 2.403 V.