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Intersil ISL8018EVAL3Z User Manual

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ISL8018EVAL3Z Evaluation Board User Guide
Description
The ISL8018EVAL3Z evaluation board is intended for use by
individuals with requirements for Point-of-Load applications
sourcing from 2.7V to 5.5V. The ISL8018EVAL3Z is used for a
complete demonstration of the performance of the
quiescent high efficiency synchronous buck regulator.
The ISL8018EVAL3Z evaluation board is a 76.2mmx76.2mm
4-layer FR4 board with 2oz copper in all layers. The complete
converter occupies 438.71mm
Recommended Equipment
The following materials are recommended to perform testing:
• 0V to 10V power supply with at least 15A source current
capability or 5V battery
• Electronic loads capable of sinking current up to 10A
• Digital Multimeters (DMMs)
• 100MHz quad-trace oscilloscope
• Signal generator
VIN
GND
October 26, 2015
UG053.1
ISL8018
low
2
area.
VIN
EN
PG
SYNCIN
SYNCOUT
ISET
VSET
FIGURE 1. BLOCK DIAGRAM
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Key Features

• High efficiency synchronous buck regulator with up to 97%
efficiency
• ±10% output voltage margining
• Adjustable current limit
• Start-up with prebiased output
• Internal soft-start - 1ms or adjustable
• Soft-stop output discharge during disabled
• Adjustable frequency from 500kHz to 4MHz - default at 1MHz
• External synchronization up to 4MHz - master to slave phase
shifting capability
References
ISL8018
datasheet

Ordering Information

PART NUMBER
ISL8018EVAL3Z
ISL8018
FS
PHASE
PGND
EPAD
SGND
COMP
SS
PHASE
FB
|
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
User Guide 053
DESCRIPTION
Evaluation Board
VOUT
GND
Copyright Intersil Americas LLC 2015. All Rights Reserved

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Summary of Contents for Intersil ISL8018EVAL3Z

  • Page 1: Key Features

    CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Copyright Intersil Americas LLC 2015. All Rights Reserved UG053.1 Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners.

  • Page 2: Switches Control

    ENABLE FUNCTION Disable VOUT1 Evaluating the Other Output Voltage Enable VOUT1 The ISL8018EVAL3Z evaluation board output is preset to 1.8V for VOUT1, however, output voltages can be adjusted from 0.6V to ENABLE FUNCTION 5V. The output voltage programming resistor, R , will depend on the desired output voltage of the regulator.

  • Page 3: Isl8018Eval3Z Evaluation Board

    1.2V and 3.3V soft-start capacitors. waveforms, load transient and relevant bode plot with external compensation configuration”. TABLE 2. COMPONENT VALUE SELECTION (REFER TO “ISL8018EVAL3Z Schematic” on page 1.2V 1.5V 1.8V 2.5V 3.3V 22µF 22µF 22µF 22µF...

  • Page 4: Isl8018Eval3Z Schematic

    ISL8018EVAL3Z Schematic FIGURE 4. ISL8018EVAL3Z SCHEMATIC...
  • Page 5 TABLE 3. BILL OF MATERIALS MANUFACTURER REFERENCE PART NUMBER QTY UNITS DESIGNATOR DESCRIPTION MANUFACTURER ISL8018EVAL3ZREVAPCB SEE LABEL-RENAME BOARD PWB-PCB, ISL8018EVAL3Z, REVA, IMAGINEERING INC ROHS GRM39COG150J050AD C4, C14 CAP, SMD, 0603, 15pF, 50V, 5%, MURATA NP0, ROHS C0603COG500-221JNE CAP, SMD, 0603, 220pF, 50V, 5%,...

  • Page 6: Pcb Layout Recommendation

    BUMPONS, 0.44inW x 0.20inH, DOMETOP, BLACK 212403-013 Place assembly in bag. BAG, STATIC, 5x8, ZIPLOC, ROHS INTERSIL C11, C12, C13, C14, C17, C18, C21, DO NOT POPULATE OR PURCHASE C22, C25, C26, C27 L2, L3 DO NOT POPULATE OR PURCHASE...

  • Page 7: Isl8018Eval3Z Board Layout

    User Guide 053 ISL8018EVAL3Z Board Layout ISL8018EVAL3Z FIGURE 5. TOP LAYER COMPONENTS FIGURE 6. TOP LAYER ETCH Submit Document Feedback UG053.1 October 26, 2015...
  • Page 8 User Guide 053 ISL8018EVAL3Z Board Layout (Continued) FIGURE 7. SECOND LAYER ETCH FIGURE 8. THIRD LAYER ETCH Submit Document Feedback UG053.1 October 26, 2015...
  • Page 9 User Guide 053 ISL8018EVAL3Z Board Layout (Continued) FIGURE 9. BOTTOM LAYER ETCH FIGURE 10. BOTTOM LAYER COMPONENTS Submit Document Feedback UG053.1 October 26, 2015...

  • Page 10: Typical Performance Curves

    User Guide 053 Typical Performance Curves Unless noted: V = 5.5V, f = 1MHz, internal (soft-start). 500mV/DIV 2V/DIV 5A/DIV 5A/DIV 500µs/DIV 500µs/DIV FIGURE 12. 1.2V = 70k, C = 220pF, C = 144µF FIGURE 11. 3.3V = 25k, C = 470pF, C = 100µF (EFFECTIVE CAPACITANCE), C = 33pF, L = 1µH...
  • Page 11 = 144µF (EFFECTIVE CAPACITANCE), C = 33pF, L = 1µH Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the document is current before proceeding.

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