Datasheet > ISL6228

ISL6228

更新时间： 2024-11-12 11:52:07

品牌	Logo	应用领域
英特矽尔 - INTERSIL		电脑控制器
页数	文件大小	规格书
16页	465K
描述
High-Performance Dual-Output Buck Controller for Notebook Applications

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ISL6228 数据手册

ISL6228

Data Sheet

May 7, 2008

FN9095.2

High-Performance Dual-Output Buck

Controller for Notebook Applications

Features

• High performance R technology

The ISL6228 IC is a dual channel synchronous-buck PWM

controller featuring Intersil's Robust Ripple Regulator (R )

• Fast transient response

• ±1% regulation accuracy: -40°C to +100°C

• Individual power stage input rail for each channel

• Wide input voltage range: +3.3V to +25V

• Output voltage range: +0.6V to +5V

technology that delivers truly superior dynamic response to

input voltage and output load transients. Integrated

MOSFET drivers and bootstrap diodes result in fewer

components and smaller implementation area.

Intersil’s R technology combines the best features of fixed-

• Diode emulation mode for increased light load efficiency

• Programmable PWM frequency: 200kHz to 600kHz

• Pre-biased output start-up capability

frequency and hysteretic PWMs while eliminating many of

their shortcomings. R technology employs an innovative

modulator that synthesizes an AC ripple voltage signal V ,

analogous to the output inductor ripple current. The AC signal

• Integrated MOSFET drivers and bootstrap diode

• Internal digital soft-start

enters a window comparator where the lower threshold is

the error amplifier output V

, and the upper threshold is a

COMP

programmable voltage reference V resulting in generation

• Power good monitor

of the PWM signal. The voltage reference V sets the

• Fault protection

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, each channel of the ISL6228 has an error amplifier

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

- Undervoltage protection

- Soft crowbar overvoltage protection

- Inductor DCR overcurrent protection

- Over-temperature protection

- Fault identification by PGOOD pull-down resistance

• Pb-free (RoHS compliant)

The ISL6228 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 ISL6228

operates in continuous-conduction-mode (CCM) in heavy

load, and in diode-emulation-mode (DEM) in light load to

improve light-load efficiency. In CCM, the controller always

operates as a synchronous rectifier. In DEM, the low-side

MOSFET is permitted to stay off, blocking negative current

flow into the low-side MOSFET from the output inductor.

Applications

• General purpose switching buck regulators

• PCI express graphical processing unit

• Auxiliary power rail

• VRM

• Network adaptor

Pinout

Ordering Information

ISL6228 (28 LD 4x4 TQFN)

PART NUMBER

(Note)

PART

MARKING

TEMP

(°C)

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL6228HRTZ

6228HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4A

28 27 26 25 24 23 22

ISL6228HRTZ-T* 6228HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4A

Tape and Reel

BOOT2

FSET2

VIN2

20 PVCC2

ISL6228IRTZ

6228IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4A

LGATE2

PGND2

VCC2

ISL6228IRTZ-T* 6228IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4A

Tape and Reel

VCC1

GND

17 PGND1

VIN1

*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.

LGATE1

PVCC1

FSET1

PGOOD1

10 11 12 13 14

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

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

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

12 3 4 5 6 7...16

中文翻译

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与ISL6228相关器件

型号	品牌	获取价格	描述	数据表
ISL6228HRTZ	INTERSIL	获取价格	High-Performance Dual-Output Buck Controller for Notebook Applications
ISL6228HRTZ-T	INTERSIL	获取价格	High-Performance Dual-Output Buck Controller for Notebook Applications
ISL6228IRTZ	INTERSIL	获取价格	High-Performance Dual-Output Buck Controller for Notebook Applications
ISL6228IRTZ-T	INTERSIL	获取价格	High-Performance Dual-Output Buck Controller for Notebook Applications
ISL6232	INTERSIL	获取价格	High Efficiency System Power Supply Controller for Notebook Computers
ISL6232CAZA	INTERSIL	获取价格	High Efficiency System Power Supply Controller for Notebook Computers
ISL6232CAZA-T	INTERSIL	获取价格	High Efficiency System Power Supply Controller for Notebook Computers
ISL6235	INTERSIL	获取价格	Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications
ISL6235CA	INTERSIL	获取价格	Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications
ISL6235CA	ROCHESTER	获取价格	SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO24, PLASTIC, SSOP-24

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