Datasheet

Evaluation Schematics
1-3
Introduction and Description
Figure 1−1. Schematic of the THS4221EVM
J6
GND
+
J4
VOUT
FB2
J1
IN −
+
−V S
C1
+VS
TP1
100 pF
−
+
U1
THS4221
4
3
1
6
2 5
J2
IN+
J5
−V S
FB1
J3
PD
J7
+VS
R6
†
R5
935 Ω
†
†
R4
1.3 kΩ
R3
649 Ω
R2
1.3 kΩ
R3
52.3 Ω
C4
22 µF
C3
0.1 µF
C2
C6
0.1 µF
C5
22 µF
C7
100 pF
†
Does not apply to the THS4221EVM
Figure 1−2. Schematic of the THS4225EVM
C7
−
+
U1
THS4225
2
3
6
7
4
1
8
FB1
J4
VOUT
+
+
R7
−VS
+VS
J7
−V S
TP1
J6
GND
J8
PD REF
J2
IN+
J9
PD
J5
+VS
C8
J1
IN −
FB2
†
†
R6
953 Ω
R5
1.3 kΩ
†
R3
1.3 kΩ
R4
649 Ω
R2
52.3 kΩ
C2
22 µF
C3
0.1 µF
C4
100 pF
C1
22 µF
C3
0.1 µF
C5
100 pF
†
Not installed on the THS4225EVM