Datasheet > ISL6228IRTZ-T

ISL6228IRTZ-T

更新时间： 2024-11-12 05:39:43

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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ISL6228IRTZ-T 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

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与ISL6228IRTZ-T相关器件

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ISL6232	INTERSIL	获取价格	High Efficiency System Power Supply Controller for Notebook Computers
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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
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ISL6235CA	ROCHESTER	获取价格	SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO24, PLASTIC, SSOP-24
ISL6235CA-T	ROCHESTER	获取价格	SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO24, PLASTIC, SSOP-24
ISL6235CA-T	RENESAS	获取价格	SWITCHING CONTROLLER, 345kHz SWITCHING FREQ-MAX, PDSO24, PLASTIC, SSOP-24
ISL6236	INTERSIL	获取价格	High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers
ISL6236	RENESAS	获取价格	High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

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