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ISL62883EVAL2Z User Guide
Application Note
July 13, 2009
AN1460.1
Author: Jia Wei
Introduction
The ISL62883EVAL2Z evaluation board demonstrates the
performance of the ISL62883 multiphase synchronous-buck
PWM V CORE controller implementing Intel IMVP-6.5
protocol. The ISL62883 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
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
? Test Point Descriptions
J2
J1
ON
S3
OFF
? Evaluation Board Documentation
- Bill of materials
_
J6
PGND
J3
D1
1
0
S1
0 U2 1
VID0
- Schematic
VIN
VID1
VID2
VID3
- Silk-screen plots
- Board layer plots
+
J5
VIN
J4
VID4
VID5
VID6
TABLE 1. DC/DC DESIGN CRITERIA
PARAMETER VALUE
UNITS
TP35 TP36
J7
VCCSENSE VSSSENSE PHASE1
J8
PHASE2
J9
PHASE3
+3.3V
J16 TP37
TP29
+5V
TP30
PGND
+
5V
_
V IN
V O
Full-load
PWM Frequency
4.5 to 20
0 to 1.5
75
300
VDC
VDC
ADC
kHz
TP3
TP2
ON
S2
OFF
ISL62883 EVAL2Z
J12
VCORE
J14
PGND
J13
PGND
Recommended Equipment
? (QTY 1) Adjustable 25V, 10A Power Supply
J10
VCORE
J11
VCORE
? (QTY 1) Fixed 5V, 100mA Power Supply
? (QTY 1) Fixed 12V, 100mA Power Supply
? (QTY 1) Adjustable Constant Current Electronic Load
? (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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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