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參數(shù)資料
| 型號： | ISL6244 |
| 廠商： | Intersil Corporation |
| 英文描述： | Multi-Phase PWM Controller(多相PWM控制器) |
| 中文描述： | 多相PWM控制器（多相脈寬調(diào)制控制器） |
| 文件頁數(shù)： | 1/25頁 |
| 文件大小： | 845K |
| 代理商： | ISL6244 |
1
FN9106.3
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. 2004 All Rights Reserved. Dynamic VID is a trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
ISL6244
Multi-Phase PWM Controller
The ISL6244 provides core-voltage regulation by driving 2 to
4 interleaved synchronous-rectified buck-converter channels
in parallel. Interleaving the channel timing results in
increased ripple frequency which reduces input and output
ripple currents. The reduction in ripple results in lower
component cost, reduced dissipation, and a smaller
implementation area.
The ISL6244 uses cost and space-saving r
DS(ON)
sensing
for channel current balance, active voltage positioning, and
over-current protection. Output voltage is monitored by an
internal differential remote sense amplifier. A high-bandwidth
error amplifier drives the output voltage to match the
programmed 5-bit DAC reference voltage. The resulting
compensation signal guides the creation of pulse width
modulated (PWM) signals to control companion Intersil
MOSFET drivers. The OFS pin allows direct offset of the
DAC voltage from 0V to 100mV using a single external
resistor. The entire system is trimmed to ensure a system
accuracy of ±1%.
Outstanding features of this controller IC include
Dynamic VID
TM
technology allowing seamless on-the-fly VID
changing without the need of any external components.
Battery “feed-forward” is provided to allow for traditional
control schemes over total input voltage variation. Output
voltage “droop” or active voltage positioning is optional.
When employed, it allows the reduction in size and cost of
the output capacitors required to support load transients. A
threshold-sensitive enable input allows the use of an
external resistor divider for start-up coordination with Intersil
MOSFET drivers or any other devices powered from a
separate supply.
Superior over-voltage protection is achieved by gating on the
lower MOSFET of all phases to reduce the output voltage.
Under-voltage conditions are detected, but PWM operation
is not disrupted. Over-current conditions cause a hiccup-
mode response as the controller repeatedly tries to restart.
After a set number of failed startup attempts, the controller
latches off. A power good logic signal indicates when the
converter output is between the UV and OV thresholds.
Features
Multi-Phase Power Conversion
- 2, 3 or 4 Phase Operation
Active Channel Current Balancing
Precision r
DS(ON)
Current Sharing
- Lossless
- Low Cost
Precision CORE Voltage Regulation
- Differential Remote Output Voltage Sensing
- Programmable Reference Offset
- ±1% System Accuracy
Microprocessor Voltage Identification Input
- 5-Bit VID Input
- 0.800V to 1.550V in 25mV Steps
- Dynamic VID Technology
Programmable Droop Voltage
Excellent Dynamic Response
- Combined Input Voltage Feed-Forward and Pulse-by-
Pulse Average Current Mode
Over Current Protection
Digital Soft Start
Threshold Sensitive Enable Input
High Ripple Frequency (160kHz to 4MHz)
QFN Package:
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Package Outline
- Near Chip Scale Package footprint, which improves PCB
efficiency and has a thinner profile
Pb-Free Available (RoHS Compliant)
Applications
AMD Hammer Family Processor Voltage Regulator
Low Output Voltage, High Current DC-DC Converters
Voltage Regulator Modules
Data Sheet
December 28, 2004
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6244CRZ | Octal D-Type Transparent Latches With 3-State Outputs 20-PDIP -40 to 85 |
| ISL6244CRZ-T | Octal D-Type Transparent Latches With 3-State Outputs 20-SO -40 to 85 |
| ISL6244HR | Multi-Phase PWM Controller |
| ISL6244CR-T | Multi-Phase PWM Controller |
| ISL6251HRZ-T | Low Cost Multi-Chemistry Battery Charger Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6244CR | 功能描述:IC REG CTRLR BUCK PWM 32-QFN 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) |
| ISL6244CR-T | 功能描述:IC REG CTRLR BUCK PWM 32-QFN 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) |
| ISL6244CRZ | 功能描述:電流型 PWM 控制器 VER OF ISL6244CR RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| ISL6244CRZ-T | 功能描述:電流型 PWM 控制器 VER OF ISL6244CR-T RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| ISL6244EVAL1 | 功能描述:EVALUATION BOARD ISL6244 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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