ISL6269EVAL2Z Intersil, ISL6269EVAL2Z Datasheet

ISL6269EVAL2Z

Manufacturer Part Number

ISL6269EVAL2Z

Description

EVALUATION BOARD FOR ISL6269

Manufacturer

Intersil

Series

Robust Ripple Regulator™ (R³)r

Datasheets

1.ISL6269CRZ.pdf (14 pages)

2.ISL6269EVAL2Z.pdf (13 pages)

Specifications of ISL6269EVAL2Z

Main Purpose

DC/DC, Step Down

Outputs And Type

1, Non-Isolated

Voltage - Output

1.1V or 1.2V

Current - Output

20A

Voltage - Input

7 ~ 25V

Regulator Topology

Buck

Frequency - Switching

300kHz or 600kHz

Board Type

Fully Populated

Utilized Ic / Part

ISL6269

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Current page: 1 of 14
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High-Performance Notebook PWM

Controller with Bias Regulator and

Audio-Frequency Clamp

The ISL6269 IC is a Single-Phase Synchronous-Buck PWM

controller featuring Intersil's Robust Ripple Regulator (R

technology that delivers truly superior dynamic response to

input voltage and output load transients. Integrated

MOSFET drivers, 5V LDO and bootstrap diode result in

fewer components and smaller implementation area.

Intersil’s R

frequency PWM and hysteretic PWM while eliminating many

of their shortcomings. R

modulator that synthesizes an AC ripple voltage signal V

analogous to the output inductor ripple current. The AC signal

the error amplifier output V

programmable voltage reference V

of the PWM signal. The voltage reference V

state PWM frequency. Both edges of the PWM can be

modulated in response to input voltage transients and output

load transients, much faster than conventional fixed frequency

PWM controllers. Unlike a conventional hysteretic converter,

the ISL6269 has an error amplifier that provides ±1% voltage

regulation at the FB pin.

The ISL6269 has a 1.5ms digital soft-start and can be started

into a pre-biased output voltage. A resistor divider is used to

program the output voltage setpoint. The ISL6269 can be

configured to operate in continuous-conduction-mode (CCM)

or diode-emulation-mode (DEM), which improves light-load

efficiency. In CCM the controller always operates as a

synchronous rectifier however, when DEM is enabled the

low-side MOSFET is permitted to stay off, blocking negative

current flow into the low-side MOSFET from the output

inductor.

Pinout

enters a window comparator where the lower threshold is

FCCM

technology combines the best features of fixed-

VCC

VIN

(16 LD 4x4 QFN)

technology employs an innovative

TOP VIEW

COMP

ISL6269

GND

, and the upper threshold is a

Data Sheet

resulting in generation

PVCC

PGND

ISEN

sets the steady

1-888-INTERSIL or 1-888-468-3774

)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Features

• High performance R

• Fast transient response

• +0.6V Internal Reference

• Wide input voltage range: +7.0V to +25.0V

• Output voltage range: +0.6V to +3.3V

• Wide output load range: 0A to 25A

• Selectable diode emulation mode for increased light load

• Programmable PWM frequency: 200kHz to 600kHz

• Pre-biased output start-up capability

• Internal 5V LDO for self-biasing

• Integrated MOSFET drivers and bootstrap diode

• Internal digital soft-start

• Power good monitor

• PWM minimum frequency above audible spectrum

• Fault protection

• Pb-free (RoHS compliant)

Applications

• PCI express graphical processing unit

• Auxiliary power rail

• VRM

• Network adapter

Ordering Information

ISL6269CRZ*

ISL6269IRZ*

*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). 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.

- ±0.6% tolerance over the commercial temperature

- ±1.0% tolerance over the industrial temperature range

efficiency

- Undervoltage protection

- Soft crowbar overvoltage protection

- Low-side MOSFET r

- Over-temperature protection

- Fault identification by PGOOD pull-down resistance

NUMBER

range (0°C to +70°C)

(-40°C to +85°C)

(Note)

PART

All other trademarks mentioned are the property of their respective owners.

June 25, 2009

Intersil (and design) is a registered trademark of Intersil Americas Inc.

62 69CRZ -10 to +100 16 Ld 4x4 QFN L16.4x4

62 69IRZ

MARKING

PART

technology

DS(ON)

-40 to +100 16 Ld 4x4 QFN L16.4x4

RANGE

TEMP

(°C)

overcurrent protection

PACKAGE

(Pb-free)

ISL6269

FN9177.3

DWG. #

PKG.

Related parts for ISL6269EVAL2Z

ISL6269EVAL2Z Summary of contents

Page 1

... TEMP PART RANGE PACKAGE MARKING (°C) (Pb-free) 62 69CRZ -10 to +100 16 Ld 4x4 QFN L16.4x4 62 69IRZ -40 to +100 16 Ld 4x4 QFN L16.4x4 | Intersil (and design registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006, 2007, 2009. All Rights Reserved PKG. DWG. # ...

Page 2

Block Diagram VIN GND PACKAGE BOTTOM VCC V REF EN − OVP + − UVP + + EA EA − FB COMP − ISEN OCP 30Ω PGOOD 5V LDO + − ...

Page 3

Typical Application R PGOOD R PVCC C C PVCC VCC R COMP C COMP1 C COMP2 R BOTTOM 3 ISL6269 ISL6269 PGOOD VIN PVCC UG VCC BOOT GND PHASE FCCM ISEN EN LG COMP PGND FB FSET VO R TOP ...

Page 4

... Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ISL6269CRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C ISL6269IRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Recommended Operating Conditions Ambient Temperature Range ISL6269CRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C ISL6269IRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C Supply Voltage (VIN to GND 25V PVCC to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ± ...

Page 5

Electrical Specifications These specifications apply for T PVCC = 5V, VIN = 15V. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. (Continued) PARAMETER VO ...

Page 6

Page 7

... Theory of Operation Modulator The ISL6269 is a hybrid of fixed frequency PWM control, and variable frequency hysteretic control. Intersil’s R can simultaneously affect the PWM switching frequency and PWM duty cycle in response to input voltage and output load transients. The term “Ripple” in the name “Robust-Ripple- Regulator” ...

Page 8

When the EN pin is pulled above the rising EN threshold voltage V ENTHR ramped above the rising POR V VCC_THR the PGOOD Soft-Start Delay t starts and the output voltage SS begins to rise. The output ...

Page 9

PWM frequency characteristic of the R architecture for the PWM frequency to decrease while in diode emulation. The extent of the frequency reduction is proportional to the ...

Page 10

... GATE DRIVERS (EQ. 7) (EQ. 8) FIGURE 6. COMPENSATION REFERENCE CIRCUIT Your local Intersil representative can provide a PC-based tool that can be used to calculate compensation network component values and help simulate the loop frequency response. The compensation network consists of the internal should be checked error amplifier of the ISL6269 and the external components R1, ...

Page 11

... Intersil provides complete reference designs that include schematics, bills of materials, and example board layouts. Selecting the LC Output Filter The duty cycle of an ideal buck converter is a function of the input and the output voltage. This relationship is written as: V OUT ...

Page 12

MOSFET Selection and Considerations Typically, a MOSFET cannot tolerate even brief excursions beyond their maximum drain to source voltage rating. The MOSFETs used in the power stage of the converter should have a maximum V rating that exceeds the sum ...

Page 13

... 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 ...

Page 14

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 14 ...

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