ISL6526IR Intersil, ISL6526IR Datasheet

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ISL6526IR

Manufacturer Part Number
ISL6526IR
Description
IC CTRLR PWM SYNC BUCK 16-QFN
Manufacturer
Intersil
Datasheet

Specifications of ISL6526IR

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
340kHz
Duty Cycle
100%
Voltage - Supply
2.97 V ~ 3.63 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
Contains lead / RoHS non-compliant

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Single Synchronous Buck Pulse-Width
Modulation (PWM) Controller
The ISL6526, ISL6526A make 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 ISL6526,
ISL6526A integrate the control, output adjustment,
monitoring and protection functions into a single package.
The ISL6526, ISL6526A provide 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 6V/µs 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.
DS(ON)
of the upper MOSFET to inhibit PWM
®
1
Data Sheet
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Operates from 3.3V to 5V Input
• 0.8V to V
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
• Fast Transient Response
• Lossless, Programmable Overcurrent Protection
• Converter can Source and Sink Current
• Small Converter Size
• Internal Soft-Start
• 14 Ld SOIC or 16 Ld 5x5 QFN
• 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
• 3.3V-Input DC/DC Regulators
• Low-Voltage Distributed Power Supplies
- 0.8V Internal Reference
- ±1.5% Over Load, Line Voltage and Temperature
- Voltage-Mode PWM Control
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
- Uses Upper MOSFET’s r
- Internal Fixed Frequency Oscillator
- 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
- DDR SDRAM Bus Termination Supply
November 24, 2008
No Leads - Package Outline
PCB Efficiency and has a Thinner Profile
Copyright © Intersil Americas Inc. 2001-2005, 2007, 2008. All Rights Reserved.
- ISL6526: 300kHz
- ISL6526A: 600kHz
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
ISL6526, ISL6526A
DS(on)
FN9055.10

Related parts for ISL6526IR

ISL6526IR Summary of contents

Page 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 registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2001-2005, 2007, 2008. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. FN9055.10 DS(on) ...

Page 2

... ISL6526 ACRZ ISL6526IBZ 6526IBZ ISL6526IBZ-T* 6526IBZ ISL6526AIBZ 6526AIBZ ISL6526AIBZ -T* 6526AIBZ ISL6526IRZ ISL 6526IRZ ISL6526IRZ-T* ISL 6526IRZ ISL6526IRZ-TK* ISL 6526IRZ ISL6526AIRZ ISL65 26AIRZ ISL6526AIRZ-T* ISL65 26AIRZ ISL6526AIRZ-TK* ISL65 26AIRZ ISL6526EVAL1 ISL6526 SOIC Evaluation Board ISL6526EVAL2 ISL6526 QFN Evaluation Board ISL6526AEVAL1 ISL6526A SOIC Evaluation Board ...

Page 3

Typical Application - 3.3V Input 3. PUMP DISABLE Typical Application - 5V Input + N/C DISABLE 3 ISL6526, ISL6526A VCC OCSET CT1 CPVOUT ISL6526, ISL6526A D BOOT CT2 BOOT CPGND C BOOT UGATE ...

Page 4

Block Diagram VCC CT1 CHARGE PUMP CT2 CPGND OCSET 20µ COMP 4 ISL6526, ISL6526A CPVOUT POWER-ON RESET (POR) + SOFT-START - OC COMPARATOR PWM ERROR COMPARATOR AMP + + - - PWM OSCILLATOR FIXED 300kHz OR ...

Page 5

... ISL6526, ISL6526A Thermal Information Thermal Resistance SOIC Package (Note +7.0V QFN Package (Notes 2, 3 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . +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 BIAS POR Commercial Industrial f ...

Page 6

Electrical Specifications Recommended Operating Conditions, unless otherwise noted V PARAMETER GATE DRIVERS Upper Gate Source Current Upper Gate Sink Current Lower Gate Source Current Lower Gate Sink Current PROTECTION/DISABLE OCSET Current Source Disable Threshold NOTE: 4. Limits should be considered ...

Page 7

ENABLE This pin is the open-collector enable pin. Pulling this pin to a level below 0.8V will disable the controller. Disabling the ISL6526, ISL6526A causes the oscillator to stop, the LGATE and UGATE outputs to be held low, and the ...

Page 8

VIN VCC CPVOUT D1 BOOT C4 Q1 UGATE ISL6526, L ISL6526A PHASE Q2 LGATE FB C1 COMP C2 R2 FIGURE 2. OUTPUT VOLTAGE SELECTION Overcurrent Protection The overcurrent function protects the converter from a shorted output by using the ...

Page 9

This situation will allow the voltage level of the input rail to increase. If the ...

Page 10

PHASE node. The PWM wave is smoothed by the output filter (L and The modulator transfer function is the small-signal transfer function This function is dominated OUT E/A ...

Page 11

Component Selection Guidelines Charge Pump Capacitor Selection A capacitor across pins CT1 and CT2 is required to create the proper bias voltage for the ISL6526, ISL6526A when operating the IC from 3.3V. Selecting the proper capacitance value is important so ...

Page 12

The RMS current rating requirement for the input capacitor of a buck regulator is approximately 1/2 the DC load current. The maximum RMS current required by the ...

Page 13

... ISL6526, ISL6526A DC/DC Converter Application Circuit Figure 8 shows an application circuit of a DC/DC Converter. is BOOT1 Detailed information on the circuit, including a complete Bill of Materials and circuit board description, can be found in Application Note AN1021: http://www.intersil.com/data/an/an1021.pdf 0.1µ VCC 6 OCSET CT1 ...

Page 14

Package Outline Drawing L16.5x5B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 02/08 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 14 ...

Page 15

... 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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