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參數(shù)資料
| 型號： | FAN5240QSCX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM |
| 中文描述： | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | QSOP-28 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 447K |
| 代理商： | FAN5240QSCX |
www.fairchildsemi.com
REV. 1.1.7 8/29/02
Features
CPU Core power: 0.925V to 2.0V output range
±1% reference precision over temperature
Dynamic voltage setting with 5-bit DAC
5V to 24V input voltage range
2 phase interleaved switching
Active droop to reduce output capacitor size
Differential remote voltage sense
High efficiency:
>90% efficiency over wide load range
>80% efficiency at light load
Excellent dynamic response with Voltage Feed-Forward
and Average Current Mode control
Dynamic duty cycle clamp minimizes inductor current
build up
Lossless current sensing on low-side MOSFET or
Precision current sensing using sense resistor
Fault protections: Over-voltage, Over-current, and
Thermal Shut-down
Controls: Enable, Forced PWM, Power Good, Power
Good Delay
QSOP28, TSSOP28
Applications
AMD Mobile Athlon
AMD Mobile Duron
CPU V
CPU V
CORE
Regulator
Regulator
CORE
General Description
The FAN5240 is a single output 2-Phase synchronous buck
controller to power AMD’s mobile CPU core. The FAN5240
includes a 5-bit digital-to-analog converter (DAC) that
adjusts the core PWM output voltage from 0.925VDC to
2.0VDC, which may be changed during operation. Special
measures are taken to allow the output to transition with
controlled slew rate to comply with AMD’s Power Now
technology. The FAN5240 includes a precision reference,
and a proprietary architecture with integrated compensation
providing excellent static and dynamic core voltage regula-
tion. The regulator includes special circuitry which balances
the 2 phase currents for maximum efficiency.
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 FAN5240 monitors the output voltage and issues a
PGOOD (Power-Good) when soft start is completed and the
output is in regulation. A pin is provided to add delay to
PGOOD with an external capacitor.
A built-in over-voltage protection (OVP) forces the lower
MOSFET on to prevent the output from exceeding a set
voltage. The PWM controller's overcurrent circuitry moni-
tors the converter load by sensing the voltage drop across the
lower MOSFET. The overcurrent threshold is set by an exter-
nal resistor. If precision overcurrent protection is required,
an optional external current-sense resistor may be used.
FAN5240
Multi-Phase PWM Controller for AMD Mobile
Athlon
and Duron
TM
TM
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| FAN5250QSC | Mobile Processor Core-Voltage Regulator |
| FAN5250QSCX | Mobile Processor Core-Voltage Regulator |
| FAN5307MPX | High-Efficiency Step-Down DC-DC Converter |
| FAN5307S18X | High-Efficiency Step-Down DC-DC Converter |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN5242_AAB3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5242MTC | 功能描述:開關變換器、穩(wěn)壓器與控制器 DC/DC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5242MTCX | 功能描述:開關變換器、穩(wěn)壓器與控制器 PWM Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5242QSC | 功能描述:開關變換器、穩(wěn)壓器與控制器 DC/DC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5242QSCX | 功能描述:開關變換器、穩(wěn)壓器與控制器 PWM Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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