
Application Note 1558
Author: Jia Wei
ISL62882CEVAL2Z User Guide
Introduction
The ISL62882CEVAL2Z evaluation board demonstrates
the performance of the ISL62882 multiphase
synchronous-buck PWM V CORE controller implementing
Intel IMVP-6.5 protocol. The ISL62882 features Intersil's
Robust Ripple Regulator (R 3 ) technology. An on-board
dynamic-load generator is included for evaluating the
transient-load response. It applies a 300μs pulse of
approximately 25m Ω load across V O and PGND.
Contents of this document include:
? Design Criteria
? Recommended Test Equipment
? Interface Connections
? Switch Descriptions
? DIP Switch Descriptions
? Jumper Descriptions
? Test Point Descriptions
? Evaluation Board Documentation
- Bill of materials
Interface Connections
? V IN : Input Voltage to the Power Stage
- J5: V IN Positive Power Input
- TP31: V IN Positive Voltage Sense
- J6: V IN Return Power Input
- TP32: V IN Return Voltage Sense
? V O: Regulated Output Voltage
- J11 and J12: V O Positive Power Output
- J13 and J14: V O Return Power Output
? +5V: +5V Input Voltage
- TP29: +5V Positive Input
- TP30: +5V Return Input
? +12V: Input Voltage for the Dynamic-load Generator
- TP3: 12V Positive Input
- TP2: 12V Return Input
Test Set-up
ON
- Schematic
J2
J1
S3
OFF
- Silk-screen plots
- Board layer plots
TABLE 1. DC/DC DESIGN CRITERIA
PARAMETER VALUE UNITS
_
VIN
+
J6
PGND
J5
VIN
D1
1
0
S1
0
U2
1
VID0
VID1
VID2
VID3
VID4
VID5
VID6
J16 +3.3V
V IN
V O
Full-load
4.5 to 20
0 to 1.5
60
VDC
VDC
ADC
TP35 TP36
J7
VCCSENSE VSSSENSE PHASE1
J8
PHASE2
TP37
TP29
+5V
TP30
PGND
+
5V
_
PWM Frequency
300
kHz
ISL62882CEVAL2Z
Recommended Equipment
? (QTY 1) Adjustable 25V, 10A Power Supply
? (QTY 1) Fixed 5V, 100mA Power Supply
? (QTY 1) Fixed 12V, 100mA Power Supply
? (QTY 1) Adjustable Constant Current Electronic Load
TP3
TP2
ON
S2
OFF
J10
VCORE
J12
VCORE
J14
PGND
J13
PGND
J11
VCORE
? (QTY 1) Digital Voltmeter
? (QTY 1) Four-Channel Oscilloscope
FIGURE 1. TEST SET-UP
Switch Descriptions
? S3: Enable
- OFF: Short the VR_ON pin to GND (disable PWM)
- ON: Allow the VR_ON pin to pull-up to +5V (enable
PWM)
? S5: Dynamic Load
- OFF: On-board dynamic load disabled
- ON: On-board dynamic load enabled
April 1, 2010
AN1558.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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