ISL6269AEVAL2Z Intersil, ISL6269AEVAL2Z Datasheet

ISL6269AEVAL2Z

Manufacturer Part Number

ISL6269AEVAL2Z

Description

EVALUATION BOARD FOR ISL6269A

Manufacturer

Intersil

Series

Robust Ripple Regulator™ (R³)r

Datasheets

1.ISL6269ACRZ.pdf (14 pages)

2.ISL6269AEVAL2Z.pdf (14 pages)

Specifications of ISL6269AEVAL2Z

Main Purpose

DC/DC, Step Down

Outputs And Type

1, Non-Isolated

Voltage - Output

1.1V or 1.2V

Current - Output

Voltage - Input

5 ~ 25V

Regulator Topology

Buck

Frequency - Switching

300kHz or 600kHz

Board Type

Fully Populated

Utilized Ic / Part

ISL6269A, ISL6269B

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Current page: 1 of 14
Download datasheet (314Kb)

High-Performance Notebook PWM

Controller

The ISL6269A IC is a Single-Phase Synchronous-Buck

PWM controller featuring Intersil's Robust Ripple Regulator

response to input voltage and output load transients.

Integrated MOSFET drivers 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 V

threshold is the error amplifier output V

threshold is a programmable voltage reference V

in generation of the PWM signal. The voltage reference V

sets the steady-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 ISL6269A has an error

amplifier that provides ±1% voltage regulation at the FB pin.

The ISL6269A 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 ISL6269A

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

) technology that delivers truly superior dynamic

enters a window comparator where the lower

FCCM

technology combines the best features of fixed-

VCC

VIN

(16 LD 4x4 QFN)

TOP VIEW

technology employs an innovative

ISL6269A

GND

Data Sheet

COMP

PVCC

PGND

ISEN

, and the upper

resulting

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

• ±1% regulation accuracy: -10°C to +100°C and

• Wide input voltage range: +5.0V 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

• Integrated MOSFET drivers and bootstrap diode

• Internal digital soft-start

• Power good monitor

• Fault protection

• Pb-free plus anneal available (RoHS compliant)

Applications

• PCI express graphical processing unit

• Auxiliary power rail

• VRM

• Network adapter

Ordering Information

*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.

ISL6269ACRZ*

ISL6269AIRZ*

PART NUMBER

-40°C to +100°C

efficiency

- Undervoltage protection

- Soft crowbar overvoltage protection

- Low-side MOSFET r

- Over-temperature protection

- Fault identification by PGOOD pull down resistance

(Note)

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

May 30, 2007

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

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

62 69AIRZ -40 to +100 16 Ld 4x4 QFN L16.4x4

MARKING

PART

technology

DS(ON)

RANGE

TEMP

(°C)

overcurrent protection

ISL6269A

PACKAGE

(Pb-free)

FN9253.2

DWG. #

PKG.

Related parts for ISL6269AEVAL2Z

ISL6269AEVAL2Z Summary of contents

Page 1

... Ld 4x4 QFN L16.4x4 62 69AIRZ -40 to +100 16 Ld 4x4 QFN L16.4x4 | Intersil (and design registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005, 2006, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ...

Page 2

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

Page 3

Typical Application R PGOOD 5V R VCC C C PVCC VCC R COMP C COMP1 C COMP2 R BOTTOM 3 ISL6269A ISL6269A PGOOD VIN PVCC UG VCC BOOT GND PHASE FCCM ISEN EN LG COMP PGND FB FSET VO R ...

Page 4

... Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ISL6269ACRZ . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C ISL6269AIRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-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 ISL6269ACRZ . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C ISL6269AIRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C Supply Voltage (VIN to GND 25V VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ± ...

Page 5

Electrical Specifications These specifications apply for V All typical specifications T PARAMETER COMP Source Current COMP Sink Current COMP High Clamp Voltage COMP Low Clamp Voltage POWER GOOD PGOOD Pull-down Impedance PGOOD Leakage Current PGOOD Maximum Sink Current (Note 3) ...

Page 6

Electrical Specifications These specifications apply for V All typical specifications T PARAMETER PROTECTION ISEN OCP Threshold ISEN Short-Circuit Threshold UVP Threshold OVP Rising Threshold OVP Falling Threshold OTP Rising Threshold (Note 3) OTP Hysteresis (Note 3) NOTE: 3. Guaranteed by ...

Page 7

... Theory of Operation Modulator The ISL6269A is a hybrid of fixed frequency PWM control, and variable frequency hysteretic control. Intersil’s R technology 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 “ ...

Page 8

VOUT VCC and PVCC EN PGOOD 2.75ms FIGURE 4. SOFT-START SEQUENCE The PGOOD pin indicates when the converter is capable of supplying regulated voltage. The PGOOD pin is an undefined impedance if has not reached the rising V VCC ...

Page 9

LG gate-driver pin is high, for eight consecutive PWM pulses. The converter will return to CCM on the following cycle after the PHASE pin detects negative voltage, indicating that the body diode of the low-side MOSFET is conducting ...

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 error amplifier of the ISL6269A and the external components ...

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 emphasizes low switch charge so that the device spends the least amount of time dissipating power in the linear region. Unlike the low-side MOSFET which has the drain-source voltage clamped by its body diode during turn off, the ...

Page 13

ISEN (Pin 9) Route the connection to the ISEN pin away from the traces and components connected to the FB pin, COMP pin, and FSET pin. LG (Pin 11) The signal going through this trace is both high dv/dt and ...

Page 14

... 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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