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| 型号： | ISL6228IRTZ-T |
| 厂商： | Intersil |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 28-TQFN |
| 标准包装： | 6,000 |
| 系列： | Robust Ripple Regulator™ (R³) |
| PWM 型： | 控制器 |
| 输出数： | 2 |
| 频率 - 最大： | 600kHz |
| 电源电压： | 3.3 V ~ 25 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 100°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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ISL6228
Data Sheet
May 7, 2008
FN9095.2
High-Performance Dual-Output Buck
Controller for Notebook Applications
The ISL6228 IC is a dual channel synchronous-buck PWM
controller featuring Intersil's Robust Ripple Regulator (R 3 )
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 3 technology combines the best features of fixed-
frequency and hysteretic PWMs while eliminating many of
their shortcomings. R 3 technology employs an innovative
modulator that synthesizes an AC ripple voltage signal V R ,
analogous to the output inductor ripple current. The AC signal
V R enters a window comparator where the lower threshold is
the error amplifier output V COMP , and the upper threshold is a
programmable voltage reference V W, resulting in generation
of the PWM signal. The voltage reference V W 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, each channel of the ISL6228 has an error amplifier
that provides ±1% voltage regulation at the FB pin.
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.
Features
? High performance R 3 technology
? 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
? Diode emulation mode for increased light load efficiency
? 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
- Undervoltage protection
- Soft crowbar overvoltage protection
- Inductor DCR overcurrent protection
- Over-temperature protection
- Fault identification by PGOOD pull-down resistance
? Pb-free (RoHS compliant)
Applications
? General purpose switching buck regulators
? PCI express graphical processing unit
? Auxiliary power rail
? VRM
? Network adaptor
Pinout
ISL6228 (28 LD 4x4 TQFN)
Ordering Information
PART NUMBER
(Note)
PART
MARKING
TEMP
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
28
27
26
25 24
23
22
ISL6228HRTZ
6228HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4A
FSET2 1
21 BOOT2
ISL6228HRTZ-T* 6228HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4A
Tape and Reel
VIN2 2
20 PVCC2
ISL6228IRTZ
6228IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4A
VCC2 3
19 LGATE2
ISL6228IRTZ-T* 6228IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4A
VCC1 4
VIN1 5
FSET1 6
PGOOD1 7
GND
18 PGND2
17 PGND1
16 LGATE1
15 PVCC1
Tape and Reel
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
8
9
10
11 12
13
14
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.
1
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.
Copyright Intersil Americas Inc. 2007, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6228LOEVAL3Z | 功能描述:EVALUATION BOARD FOR ISL6228LO RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:Robust Ripple Regulator™ (R³) 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6232 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High Efficiency System Power Supply Controller for Notebook Computers |
| ISL6232CA | 制造商:Intersil Corporation 功能描述:HI EFFICIENCY SYSTEM PWR SUPPLY CONTR. FOR NOTEBOOK COMPUTER - Rail/Tube |
| ISL6232CA-T | 制造商:Intersil Corporation 功能描述:HI EFFICIENCY SYSTEM PWR SUPPLY CONTR. FOR NOTEBOOK COMPUTER - Tape and Reel |
| ISL6232CAZ | 制造商:Intersil Corporation 功能描述:LEAD-FREE HI EFFICIENCY SYSTEM PWR SUPPLY CONTR FOR NOTEBOOK - Rail/Tube |
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