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參數資料
| 型號： | FAN5250QSC |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Mobile Processor Core-Voltage Regulator |
| 中文描述： | SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | 0.150 INCH, MO-137, QSOP-24 |
| 文件頁數： | 1/17頁 |
| 文件大小： | 469K |
| 代理商： | FAN5250QSC |
www.fairchildsemi.com
REV. 1.1.6 3/12/03
Features
High efficiency over wide load range
Non dissipative current-sense; uses MOSFET R
can use optional Current-Sense resistor for greater
precision
Overcurrent protection
Powerful drivers for N-Channel MOSFETs with adaptive
dead time
Precision core voltage control
Remote “Kelvin” sensing
Summing current-mode control with programmable
Active Droop for Optimum Transient Response and
Lower Processor Power Dissipation
5-Bit Digital Output Voltage Selection
Wide Range output voltage: 0.6 VDC to 1.0 VDC in
25mV Steps, and from 1.0 VDC to 1.75 VDC in 50mV
Steps
“On-the-Fly” VID code change with programmable slew
rate
Alternative input to set output voltage during start-up or
power saving modes
Forced continuous conduction mode of operation
Output voltage (Power-Good) monitor
No negative core voltage on turn-off
Over-Voltage, Under-Voltage and Over-Current fault
monitors
Selectable 300/600kHz Switching Frequency
DS(ON)
or
Applications
Transmeta’s Crusoe CPU core power
Intel P3-M processor (IMVP-2)
Description
The FAN5250 is a single output power controller to power
mobile CPU cores. The FAN5250 includes a 5-bit digital-to-
analog converter (DAC) that adjusts the core PWM output
voltage from 0.6VDC to 1.75VDC, and may be changed
during operation. Special measures are taken to allow the
output to transition with controlled slew rate to comply with
Transmeta’s LongRun and Intel’s P3-M Speed-Step
requirements. The FAN5250 includes a precision reference,
and a proprietary architecture with integrated compensation
providing excellent static and dynamic core voltage regula-
tion.
With nominal currents, the controller operates at a selectable
frequency of 300kHz or 600kHz. At light loads, when the
filter inductor current becomes discontinuous, the controller
operates in a hysteretic mode dramatically improving system
efficiency. The hysteretic mode of operation can be inhibited
by the FPWM control pin.
The FAN5250 monitors the output voltage and issues a
PGOOD (Power-Good) when soft start is completed and the
output is in regulation. A built-in over-voltage protection
(OVP) forces the lower MOSFET on to prevent output volt-
ages from exceeding 1.9V. Undervoltage protection latches
the chip off when the output drops below 75% of the set
value. The PWM controller's overcurrent circuitry monitors
the converter load by sensing the voltage drop across the
lower MOSFET. The overcurrent threshold is set by an
external resistor. If precision overcurrent protection is
required, an optional external current-sense resistor may
be used.
FAN5250
Mobile Processor Core-Voltage Regulator
LongRun is a trademark of Transmeta Corporation.
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PDF描述 |
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| FAN5250QSCX | Mobile Processor Core-Voltage Regulator |
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| FAN5307S18X | High-Efficiency Step-Down DC-DC Converter |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5250QSC_Q | 功能描述:DC/DC 開關控制器 DC/DC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5250QSCX | 功能描述:DC/DC 開關控制器 Crusoe Processor Core Voltage RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5250QSCX_SM2E203 | 功能描述:IC REG MOBILE PROC CORE 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數:10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
| FAN5307 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:High-Efficiency Step-Down DC-DC Converter |
| FAN5307MP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Fairchild Semiconductor Corporation 功能描述: |
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