ISL6227CAZ-T Intersil, ISL6227CAZ-T Datasheet

ISL6227CAZ-T

Manufacturer Part Number

ISL6227CAZ-T

Description

IC CONTROLLER DDR, DDR2 28QSOP

Manufacturer

Intersil

Datasheets

1.ISL6227.pdf (27 pages)

2.ISL6227CAZ-T.pdf (27 pages)

3.ISL6227CAZ-T.pdf (28 pages)

Specifications of ISL6227CAZ-T

Package / Case

28-QSOP

Mounting Type

Surface Mount

Voltage - Output

0.9 ~ 5.5 V

Voltage - Input

5 ~ 28 V

Operating Temperature

-10°C ~ 100°C

Applications

Controller, DDR, DDR2

Number Of Outputs

Peak Reflow Compatible (260 C)

Yes

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6227CAZ-T

Manufacturer:

Intersil

Quantity:

2 500

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ISL6227CAZ-T

Manufacturer:

Intersil

Quantity:

1 311

Company:

BOSTOCK HK LIMITED

Part Number:

ISL6227CAZ-T

Manufacturer:

INTERSIL

Quantity:

8 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

ISL6227CAZ-T

Manufacturer:

INTERSIL

Quantity:

20 000

Current page: 1 of 27
Download datasheet (861Kb)

Dual Mobile-Friendly PWM Controller with

DDR Option

The ISL6227 dual PWM controller delivers high efficiency

precision voltage regulation from two synchronous buck DC/DC

converters. It was designed especially to provide power

regulation for DDR memory, chipsets, graphics and other

system electronics in Notebook PCs. The ISL6227’s wide

input voltage range capability allows for voltage conversion

directly from AC/DC adaptor or Li-Ion battery pack.

Automatic mode transition of constant-frequency synchronous

rectification at heavy load, and hysteretic (HYS)

diode-emulation at light load, assure high efficiency over a wide

range of conditions. The HYS mode of operation can be

disabled separately on each PWM converter if

constant-frequency continuous-conduction operation is desired

for all load levels. Efficiency is further enhanced by using the

lower MOSFET r

Voltage-feed-forward ramp modulation, current mode

control, and internal feedback compensation provide fast

response to input voltage and load transients. Input current

ripple is minimized by channel-to-channel PWM phase shift

of 0°, 90° or 180° (determined by input voltage and status of

the DDR pin).

The ISL6227 can control two independent output voltages

adjustable from 0.9V to 5.5V, or by activating the DDR pin,

transform into a complete DDR memory power supply

solution. In DDR mode, CH2 output voltage VTT tracks CH1

output voltage VDDQ. CH2 output can both source and sink

current, an essential power supply feature for DDR memory.

The reference voltage VREF required by DDR memory is

generated as well.

In dual power supply applications the ISL6227 monitors the

output voltage of both CH1 and CH2. An independent PGOOD

(power good) signal is asserted for each channel after the

soft-start sequence has completed, and the output voltage is

within PGOOD window. In DDR mode CH1 generates the only

PGOOD signal.

Built-in overvoltage protection prevents the output from going

above 115% of the set point by holding the lower MOSFET on

and the upper MOSFET off. When the output voltage re-enters

regulation, PGOOD will go HIGH and normal operation

automatically resumes. Once the soft-start sequence has

completed, undervoltage protection latches the offending

channel off if the output drops below 75% of its set point value.

Adjustable overcurrent protection (OCP) monitors the voltage

drop across the r

current-sensing is required, an external current sense resistor

may be used.

DS(ON)

as the current sense element.

of the lower MOSFET. If more precise

Data Sheet

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

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

Features

• Provides regulated output voltage in the range 0.9V to

• Operates from an input battery voltage range of 5V to 28V

• Complete DDR1 and DDR2 memory power solution with

• Flexible PWM or HYS plus PWM mode selection with HYS

• r

• Excellent dynamic response with voltage feed-forward and

• Undervoltage lock-out on VCC pin

• Power-good, overcurrent, overvoltage, undervoltage

• Synchronized 300kHz PWM operation in PWM mode

• Pb-free plus anneal available (RoHS compliant)

Applications

• Notebook PCs and Desknotes

• Tablet PCs/Slates

• Hand-held portable instruments

Ordering Information

ISL6227CA*

ISL6227CAZ*

(Note)

ISL6227IA*

ISL6227IAZ*

(Note)

ISL6227HRZ*

(Note)

ISL6227IRZ*

(Note)

*Add “-T” suffix for tape and reel. Please refer to TB347 for details on

reel specifications.

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.

5.5V

or from 3.3V/5V system rail

VTT tracking VDDQ/2 and a VDDQ/2 buffered reference

output

diode emulation at light loads for higher system efficiency

current mode control accommodating wide range LC filter

selections

protection for both channels

NUMBER

DS(ON)

PART

August 7, 2007

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

current sensing

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

ISL 6227CA

ISL 6227CAZ -10 to +100 28 Ld QSOP

ISL 6227IA

ISL 6227IAZ

ISL 6227HRZ -10 to +100 28 Ld QFN

ISL 6227IRZ

MARKING

PART

RANGE (°C)

-40 to +100 28 Ld QFN

-10 to +100 28 Ld QSOP M28.15

-40 to +100 28 Ld QSOP M28.15

-40 to +100 28 Ld QSOP

TEMP.

(Pb-free)

PACKAGE

ISL6227

FN9094.5

M28.15

L28.5x5

DWG. #

PKG.

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