ISL6520CB Intersil, ISL6520CB Datasheet

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ISL6520CB

Manufacturer Part Number
ISL6520CB
Description
IC CTRLR PWM SYNC BUCK 8-SOIC
Manufacturer
Intersil
Datasheet

Specifications of ISL6520CB

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
340kHz
Duty Cycle
100%
Voltage - Supply
4.5 V ~ 5.5 V
Buck
Yes
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
0°C ~ 70°C
Package / Case
8-SOIC (3.9mm Width)
Frequency-max
340kHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL6520CB
Manufacturer:
INTERSIL
Quantity:
20 000
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
operation appropriately. This approach simplifies the
implementation and improves efficiency by eliminating the
need for a current sense resistor.
Ordering Information
ISL6520CB*
ISL6520CBZ*
(Note)
ISL6520IB*
ISL6520IBZ*
(Note)
ISL6520CR*
ISL6520CRZ*
(Note)
ISL6520IR*
ISL6520IRZ*
(Note)
ISL6520EVAL1
* 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.
NUMBER
PART
6520CB
6520 CBZ
6520IB
6520 IBZ
ISL
6520CR
65 20CRZ
ISL 6520IR
65 20IRZ
MARKING
DS(ON)
PART
of the upper MOSFET to inhibit PWM
RANGE (°C)
Evaluation Board
®
-40 to 85
-40 to 85
-40 to 85
-40 to 85
0 to 70
0 to 70
0 to 70
0 to 70
TEMP.
1
Data Sheet
8 Ld SOIC
8 Ld SOIC
(Pb-free)
8 Ld SOIC
8 Ld SOIC
(Pb-free)
16 Ld 4x4mm QFN L16.4x4
16 Ld 4x4mm QFN
(Pb-free)
16 Ld 4x4mm QFN L16.4x4
(Pb-free)
16 Ld 4x4mm QFN
PACKAGE
1-888-INTERSIL or 1-888-468-3774
M8.15
M8.15
M8.15
M8.15
L16.4x4
L16.4x4
DWG. #
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
PKG.
Features
• Operates from +5V Input
• 0.8V to V
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
• Fast Transient Response
• Lossless, Programmable Over-Current Protection
• Small Converter Size
• QFN Package:
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Power Supplies for Microprocessors
• Subsystem Power Supplies
• Cable Modems, Set Top Boxes, and DSL Modems
• DSP and Core Communications Processor Supplies
• Memory Supplies
• Personal Computer Peripherals
• Industrial Power Supplies
• 5V-Input DC/DC Regulators
• Low-Voltage Distributed Power Supplies
- 0.8V Internal Reference
- ±1.5% Over Line Voltage and Temperature
- Voltage-Mode PWM Control
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
- Uses Upper MOSFET’s r
- 300kHz Fixed Frequency Oscillator
- Internal Soft Start
- 8 Ld SOIC or 16Ld 4mmx4mm QFN
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
- Near Chip Scale Package footprint, which improves
- PCs
- Embedded Controllers
- PCI/AGP/GTL+ Buses
- ACPI Power Control
No Leads - Package Outline
PCB efficiency and has a thinner profile
Copyright © Intersil Americas Inc. 2003, 2005, 2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
April 3, 2007
|
IN
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Output Range
DS(on)
ISL6520
FN9009.6

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ISL6520CB Summary of contents

Page 1

... 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 SOIC ISL6520CBZ* 6520 CBZ SOIC (Note) (Pb-free) ISL6520IB* 6520IB - SOIC ISL6520IBZ* 6520 IBZ - SOIC ...

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 ...

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