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參數(shù)資料
| 型號： | ISL6557CB-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multi-Phase PWM Controller for Core-Voltage Regulation |
| 中文描述： | SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | PLASTIC, MS-013AD, SOIC-24 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 532K |
| 代理商： | ISL6557CB-T |
1
FN9059.2
ISL6557
Multi-Phase PWM Controller for
Core-Voltage Regulation
The ISL6557 provides core-voltage regulation by driving up
to four interleaved synchronous-rectified buck-converter
channels in parallel. Intersil multi-phase controllers together
with Intersil MOSFET drivers form the basis for the most
reliable power-supply solutions available to power the latest
industry-leading microprocessors. Multi-phase buck-
converter architecture uses interleaved timing to multiply
ripple frequency and reduce input and output ripple currents.
Lower ripple results in lower total component cost, reduced
dissipation, and smaller implementation area. Pre-
configured for 4-phase operation, the ISL6557 offers the
flexibility of selectable 2- or 3-phase operation. Simply
connect the unused PWM pins to VCC. The channel
switching frequency is adjustable in the range of 50kHz to
1.5MHz giving the designer the ultimate flexibility in
managing the balance between high-speed response and
good thermal management.
New features on the ISL6557 include Dynamic-VID
technology allowing seamless on-the-fly VID changes with
no need for any additional external components. When the
ISL6557 receives a new VID code, it incrementally steps the
output voltage to the new level. Dynamic VID changes are
fast and reliable with no output voltage overshoot or
undershoot. The RGND and VSEN pins provide inputs for
differential remote voltage sensing to improve regulation and
protection accuracy. A threshold-sensitive enable pin (EN)
can be used with an external resistor divider to optionally set
the power-on voltage level. This allows optional start-up
coordination with Intersil MOSFET drivers or any other
devices powered from a separate supply.
Like other Intersil multiphase controllers, the ISL6557 uses
cost and space-saving
r
DS(ON)
sensing for channel current
balance, dynamic voltage positioning, and overcurrent
protection. Channel current balancing is automatic and
accurate with the integrated current-balance control system.
Overcurrent protection can be tailored to any application with
no need for additional parts. The IOUT pin carries a signal
proportional to load current and can be optionally connected
to FB for accurate load-line regulation.
An integrated DAC decodes the 5-bit logic signal present at
VID4-VID0 and provides an accurate reference for precision
voltage regulation. The high-bandwidth error amplifier,
differential remote-sensing amplifier, and accurate voltage
reference all work together to provide better than 0.8% total
system accuracy, and to enable the fastest transient
response available.
Features
Multi-Phase Power Conversion
Active Channel Current Balancing
Precision
r
DS(ON)
Current Sensing
- Low Cost
- Lossless
Precision CORE Voltage Regulation
- Differential Remote Voltage Sensing
-
±
0.8% System Accuracy
Microprocessor Voltage Identification Input
- Dynamic VID technology
- 5-Bit VID Input
- 1.100V to 1.850V in 25mV Steps
Programmable Power-On Bias Level
Programmable Droop Voltage
Fast Transient Recovery Time
Precision Enable Threshold
Overcurrent Protection
2-, 3-, or 4-Phase Operation
High Ripple Frequency. Channel Frequency Times
Number Channels (100kHz to 6MHz)
Pinout
ISL6557 24 PIN (SOIC)
TOP VIEW
Ordering Information
PART NUMBER
TEMP. (
o
C)
PACKAGE
PKG. DWG. #
ISL6557CB
0 to 70
24-Ld SOIC
M24.3
ISL6557CB-T
24-Ld SOIC Tape and Reel
VID4
VID3
VID2
VID1
VID0
IOUT
PWM2
PGOOD
PWM3
ISEN4
ISEN1
VDIFF
ISEN3
FB
PWM4
VSEN
COMP
PWM1
ISEN2
RGND
GND
FS
EN
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Data Sheet
August 2003
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners. Dynamic VID is a trademark of Intersil Americas Inc.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6557CB-T WAF | 制造商:Intersil Corporation 功能描述: |
| ISL6558CB | 功能描述:DC/DC 開關(guān)控制器 Precision MultiPhase RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| ISL6558CB-T | 功能描述:IC REG CTRLR BUCK PWM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ISL6558CBZ | 制造商:Intersil Corporation 功能描述:- Rail/Tube |
| ISL6558CBZA | 功能描述:DC/DC 開關(guān)控制器 W/ANNEAL 16LD N 2-4 PHS PWM BUCK CNTRLR RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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