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參數(shù)資料
型號: FAN5240MTC
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: MO-153AB, TSSOP-28
文件頁數(shù): 7/19頁
文件大小: 447K
代理商: FAN5240MTC
PRODUCT SPECIFICATION
FAN5240
REV. 1.1.7 8/29/02
7
Circuit Description
Overview
The FAN5240 is a 2-phase, single output power management
IC, which supplies the low-voltage, high-current power to
modern processors for notebook PCs. Using very few exter-
nal components, the IC controls a precision programmable
synchronous buck converter driving external N-Channel
power MOSFETs. The output voltage is adjustable from
0.925V to 2.0V by changing the DAC (VID) code settings
(see Table 2). The output voltage of the core converter can be
changed on-the-fly with programmable slew rate, which
meets a key requirement of AMD's Mobile Athlon/Duron
processors.
The converter can operate in two modes: fixed frequency
PWM, and variable frequency hysteretic depending on the
load. At loads lower than the point where filter inductor cur-
rent becomes discontinuous, hysteretic mode of operation is
activated. Switchover from PWM to hysteretic operation at
light loads improves the converter's efficiency and prolongs
battery run time. As the filter inductor resumes continuous
current, the PWM mode of operation is restored.
Output Voltage Programming
The output voltage of the converter is programmed by an
internal DAC in discrete steps of 25mV from 0.925V to
1.300V and then in 50mV steps from 1.300V to 2.00V:
Table 2.
Output voltage VID
1 - Logic High or open, 0 = Logic Low
VID0–4 pins will assume a logic 1 level if left open as each
input is pulled up with a 1
μ
A internal current source.
VID4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
VID2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
VOUT to CPU
0.000
0.925
0.950
0.975
1.000
1.025
1.050
1.075
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
0.000
1.300
1.350
1.400
1.450
1.500
1.550
1.600
1.650
1.700
1.750
1.800
1.850
1.900
1.950
2.000
相關(guān)PDF資料
PDF描述
FAN5240MTCX Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM
FAN5240QSC Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM
FAN5240QSCX Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM
FAN5250 Mobile Processor Core-Voltage Regulator
FAN5250QSC Mobile Processor Core-Voltage Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FAN5240MTC_Q 功能描述:開關(guān)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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
FAN5240MTCX 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 PWM Controller Two Phase 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
FAN5240QSC 功能描述:開關(guān)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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
FAN5240QSCX 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 PWM Controller Two Phase 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(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
FAN5242_AAB3026B WAF 制造商:Fairchild Semiconductor Corporation 功能描述:
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