ISL6520AIRZ-TS2698 Intersil, ISL6520AIRZ-TS2698 Datasheet

IC CTRLR PWM SYNC BUCK 16-QFN

ISL6520AIRZ-TS2698

Manufacturer Part Number
ISL6520AIRZ-TS2698
Description
IC CTRLR PWM SYNC BUCK 16-QFN
Manufacturer
Intersil
Datasheet

Specifications of ISL6520AIRZ-TS2698

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
-40°C ~ 85°C
Package / Case
16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
Frequency-max
340kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6520A 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 ISL6520A
integrates the control, output adjustment, monitoring and
protection functions into a single 8 Lead package.
The ISL6520A 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/ms slew rate which enables high converter
bandwidth for fast transient performance. The resulting
PWM duty cycles range from 0% to 100%.
Protection from overcurrent 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.
Pinouts
UGATE
BOOT
GND
NC
UGATE
LGATE
DS(ON)
BOOT
GND
1
2
3
4
1
2
3
4
16
5
of the upper MOSFET to inhibit PWM
(16 LD QFN)
(8 LD SOIC)
TOP VIEW
TOP VIEW
ISL6520A
ISL6520A
15
®
6
1
14
7
13
Data Sheet
8 8
8
7
6
5
12
10
PHASE
FB
11
COMP/SD
VCC
9
NC
COMP/OCSET
NC
FB
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Operates from +5V Input
• 0.8V to V
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
• Fast Transient Response
• Lossless, Programmable Overcurrent Protection
• Small Converter Size
• QFN Package:
• Pb-Free (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
December 10, 2009
- 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 16 Ld 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
- SSTL-2 and DDR SDRAM Bus Termination Supply
No Leads - Package Outline
PCB efficiency and has a thinner profile
Copyright © Intersil Americas Inc. 2004, 2006, 2007, 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
|
IN
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Output Range
DS(ON)
ISL6520A
FN9016.6

Related parts for ISL6520AIRZ-TS2698

ISL6520AIRZ-TS2698 Summary of contents

Page 1

... Low-Voltage Distributed Power Supplies 9 FB 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. 2004, 2006, 2007, 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL6520A FN9016.6 Output Range ...

Page 2

... ACBZ ISL6520AIBZ* 6520 AIBZ ISL6520ACRZ* 65 20ACRZ ISL6520AIRZ* 65 20AIRZ ISL6520EVAL1 Evaluation Board *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations) ...

Page 3

Block Diagram + 0. COMP/OCSET 20μA Typical Application R OCSET COMP/OCSET OFFSET 3 ISL6520A + SAMPLE AND - OC HOLD COMPARATOR PWM ERROR COMPARATOR AMP + + - - OSCILLATOR FIXED 300kHz V ...

Page 4

... Thermal Information Thermal Resistance SOIC Package (Note 7.0V (DC) QFN Package (Notes 2, 3 Maximum Junction Temperature (Plastic Package +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp SYMBOL TEST CONDITIONS I VCC POR f ISL6520AC, VCC = 5V ...

Page 5

Functional Pin Description VCC This pin provides the bias supply for the ISL6520A, 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 6

OUTPUT INDUCTOR CURRENT 5A/DIV. TIME (5ms/DIV.) FIGURE 1. OVERCURRENT OPERATION The overcurrent function will trip at a peak inductor current (I determined by Equation 3: PEAK OCSET OCSET I = ---------------------------------------------------- - PEAK ...

Page 7

V IN ISL6520A UGATE Q 1 PHASE Q 2 LGATE RETURN FIGURE 3. PRINTED CIRCUIT BOARD POWER AND GROUND PLANES OR ISLANDS Figure 3 shows the critical power components of the converter. To minimize the voltage overshoot, the interconnecting wires ...

Page 8

ST 4. Place 1 Pole at the ESR Zero Place 2 Pole at Half the Switching Frequency. 6. Check Gain against Error Amplifier’s Open-Loop Gain. 7. Estimate Phase Margin - Repeat if Necessary. Compensation Break Frequency Equations 1 ...

Page 9

The response time to a transient is different for the application of load and the removal of load. The following equations give the approximate response time interval for application and removal of a transient load TRAN t ...

Page 10

... 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 FN9016.6 December 10, 2009 ...

Page 11

Package Outline Drawing L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 6, 02/08 4.00 6 PIN 1 INDEX AREA 0.15 (4X) TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 11 ...

Page 12

... 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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