2
AN1553.0
March 24, 2010
DIP-Switch Descriptions
• S1: Set the control signals
- S1.1: Set the DPRSLPVR signal
- S1.2: Set the DPRSTP# signal
• U2: Set the VID
Jumper Descriptions
• J16: If installed, the +5V rail supplies the +3.3V rail
to the auxiliary circuit on the board. DO NOT APPLY
+3.3V TO TP37/TP30 WHILE J16 IS
INSTALLED! IT’LL SHORT THE +5V AND THE
+3.3V POWER SUPPLIES. When measuring board
efficiency, uninstall J16 and apply +3.3V to
TP37/TP30.
Test Point Descriptions
TEST POINT
DESCRIPTION
J7
Scope-probe socket for measuring
PHASE1.
J10
Scope-probe socket for measuring V
O
.
J15
Scope-probe socket for measuring the
current of the on-board transient-load
emulator.
TP1
Monitor the on-board 1.2V power supply.
TP2
+12V power supply return input.
TP3
+12V power supply positive input.
TP4
Monitor the COMP pin.
TP5
Monitor the VW pin.
TP6
Monitor the FB pin.
TP7
Monitor the DPRSLPVR pin.
TP12
Input side of the compensator.
TP13
Monitor the PGOOD pin.
TP14
Monitor the VSEN pin.
TP16
Monitor the CLK_EN# pin.
TP17
Monitor the VR_ON pin.
TP18
Monitor the RTN pin.
TP19
Monitor the positive side of C82.
TP20
Monitor the negative side of C82.
TP21
Monitor the VID6 pin.
TP22
Monitor the VID5 pin.
TP23
Monitor the VID4 pin.
TP24
Monitor the VID3 pin.
TP25
Monitor the VID2 pin.
TP26
Monitor the VID1 pin.
TP27
Monitor the VID0 pin.
TP28
Monitor the IMON pin.
TP29
+5V power supply positive input.
TP30
+5V power supply return input.
TP31
V
IN
positive voltage sense.
TP32
V
IN
return voltage sense.
TP33
Monitor MOSFET Q3 gate signal.
TP37
+3.3V power supply positive input.
Test Point Descriptions
(Continued)
TEST POINT
DESCRIPTION
Bill of Materials
QTY
REFERENCE
VALUE
DESCRIPTION
MFG.
PART NUMBER
PACKAGE
1
PCB
ISL62881GPUEVAL2ZREVB
1
C1
0.01µF Multilayer Cap, 16V, 10%
GENERIC
H1045-00103-16V10
SM0603
1
C11
390pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00391-16V10
SM0603
1
C12
330pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00331-16V10
SM0603
1
C13
1000pF Multilayer Cap, 16V, 10%
GENERIC
H1045-00102-16V10
SM0603
0
C14, C15, C19, C39,
C44, C42, C43, C47-
C50, C53, C62-C78,
C81, C86
DNP
5
C16, C2, C22, C23,
C79
1µF
Multilayer Cap, 16V, 20%
GENERIC
H1045-00105-16V20
SM0603
2
C17, C30
0.22µF Multilayer Cap, 25V, 10%
GENERIC
H1045-00224-25V10
SM0603
1
C18
0.27µF Multilayer Cap, 16V, 10%
GENERIC
H1045-00274-16V10
SM0603
3
C20, C45, C58
0.1µF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00104-16V10
SM0603
1
C21
0.047µF Multilayer Cap, 16V, 10%
GENERIC
H1045-00473-16V10
SM0603
Application Note 1553
