
2AN1553.0
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 VO.
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 VIN positive voltage sense.
TP32 VIN 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