ISL6520EVAL1

Manufacturer Part NumberISL6520EVAL1
DescriptionEVALUATION BOARD 1 ISL6520
ManufacturerIntersil
ISL6520EVAL1 datasheet
 


Specifications of ISL6520EVAL1

Mfg Application NotesISL6520(A) App NoteMain PurposeDC/DC, Step Down
Outputs And Type1, Non-IsolatedVoltage - Output3.3V
Current - Output15AVoltage - Input4.5 ~ 5.5V
Regulator TopologyBuckFrequency - Switching300kHz
Board TypeFully PopulatedUtilized Ic / PartISL6520
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantPower - Output-
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
Page 1/11

Download datasheet (317Kb)Embed
Next
®
Data Sheet
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6520 makes simple work out of implementing a
complete control and protection scheme for a DC/DC
stepdown converter. Designed to drive N-Channel
MOSFETs in a synchronous buck topology, the ISL6520
integrates the control, output adjustment, monitoring and
protection functions into a single 8 Lead package.
The ISL6520 provides simple, single feedback loop, voltage-
mode control with fast transient response. The output
voltage can be precisely regulated to as low as 0.8V, with a
maximum tolerance of ±1.5% over-temperature and line
voltage variations. A fixed frequency oscillator reduces
design complexity, while balancing typical application cost
and efficiency.
The error amplifier features a 15MHz gain-bandwidth
product and 8V/μs slew rate which enables high converter
bandwidth for fast transient performance. The resulting
PWM duty cycles range from 0% to 100%.
Protection from over-current conditions is provided by
monitoring the r
of the upper MOSFET to inhibit PWM
DS(ON)
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
Ordering Information
PART
PART
TEMP.
NUMBER
MARKING
RANGE (°C)
ISL6520CB*
6520CB
0 to 70
8 Ld SOIC
ISL6520CBZ*
6520 CBZ
0 to 70
8 Ld SOIC
(Note)
(Pb-free)
ISL6520IB*
6520IB
-40 to 85
8 Ld SOIC
ISL6520IBZ*
6520 IBZ
-40 to 85
8 Ld SOIC
(Note)
(Pb-free)
ISL6520CR*
ISL
0 to 70
16 Ld 4x4mm QFN L16.4x4
6520CR
ISL6520CRZ*
65 20CRZ
0 to 70
16 Ld 4x4mm QFN
(Note)
(Pb-free)
ISL6520IR*
ISL 6520IR
-40 to 85
16 Ld 4x4mm QFN L16.4x4
ISL6520IRZ*
65 20IRZ
-40 to 85
16 Ld 4x4mm QFN
(Note)
(Pb-free)
ISL6520EVAL1
Evaluation Board
* Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are RoHS compliant and compatible
with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
April 3, 2007
Features
• Operates from +5V Input
• 0.8V to V
- 0.8V Internal Reference
- ±1.5% Over Line Voltage and Temperature
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
• Lossless, Programmable Over-Current Protection
- Uses Upper MOSFET’s r
• Small Converter Size
- 300kHz Fixed Frequency Oscillator
- Internal Soft Start
- 8 Ld SOIC or 16Ld 4mmx4mm QFN
• QFN Package:
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
PKG.
PACKAGE
DWG. #
• Power Supplies for Microprocessors
M8.15
- PCs
M8.15
- Embedded Controllers
• Subsystem Power Supplies
M8.15
- PCI/AGP/GTL+ Buses
M8.15
- ACPI Power Control
• Cable Modems, Set Top Boxes, and DSL Modems
• DSP and Core Communications Processor Supplies
L16.4x4
• Memory Supplies
• Personal Computer Peripherals
L16.4x4
• Industrial Power Supplies
• 5V-Input DC/DC Regulators
• Low-Voltage Distributed Power Supplies
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
1-888-INTERSIL or 1-888-468-3774
Copyright © Intersil Americas Inc. 2003, 2005, 2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL6520
FN9009.6
Output Range
IN
DS(on)
Intersil (and design) is a registered trademark of Intersil Americas Inc.

ISL6520EVAL1 Summary of contents

  • Page 1

    ... Ld 4x4mm QFN (Note) (Pb-free) ISL6520EVAL1 Evaluation Board * Add “-T” suffix for tape and reel. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

  • Page 2

    Pinouts ISL6520 (8 LD SOIC) TOP VIEW BOOT 1 UGATE 2 GND 3 LGATE 4 Block Diagram SAMPLE AND HOLD + 0. COMP/OCSET 20 μA Typical Application R OCSET COMP/OCSET OFFSET 2 ISL6520 ...

  • Page 3

    Absolute Maximum Ratings Supply Voltage +6.0V CC ...

  • Page 4

    Functional Pin Description VCC This is the main bias supply for the ISL6520, as well as the lower MOSFET’s gate. Connect a well-decoupled 5V supply to this pin. FB This pin is the inverting input of the internal error amplifier. ...

  • Page 5

    Start interval and causes an over-current trip. The converter dissipates very little power with this method. The measured input power for the conditions of Figure 1 is only 1.5W. OUTPUT INDUCTOR CURRENT 5A/DIV. TIME (5ms/DIV.) FIGURE 1. OVERCURRENT OPERATION The ...

  • Page 6

    Figure 4 shows the circuit traces that require additional layout consideration. Use single point and ground plane construction for the circuits shown. Minimize any leakage current paths on the COMP/OCSET pin and locate the resistor the COMP/OCSET pin ...

  • Page 7

    The compensation gain uses external impedance networks Z and Z to provide a stable, high bandwidth (BW) overall FB IN loop. A stable control loop has a gain crossing with -20dB/decade slope and a phase margin greater than 45 degrees. ...

  • Page 8

    MOSFETs and between the drain The important parameters for the bulk input capacitor are the voltage rating and the RMS current rating. For reliable operation, select the bulk capacitor with voltage and current ...

  • Page 9

    ... REF 8 PHASE + - 4 LGATE + - 6 OSC 3 GND U 1 3.16kΩ 60.4Ω 18000pF L - 3.1μH Inductor, Panasonic P/N ETQ-P6F2ROLFA or Equivalent FIGURE 3.3V 15A DC/DC CONVERTER 2 x 1μ 0.1μ OUT 3 x 330μF - Intersil MOSFET; HUF76143 OUT 0.1μF FN9009.6 April 3, 2007 ...

  • Page 10

    Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the ...

  • Page 11

    ... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...