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參數(shù)資料
| 型號： | MAX1718 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP -40 to 85 |
| 中文描述： | 筆記本電腦CPU降壓型控制器，用于Intel移動電壓定位(IMVP-II) |
| 文件頁數(shù)： | 20/35頁 |
| 文件大?。?/td> | 700K |
| 代理商： | MAX1718 |
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M
Notebook CPU Step-Down Controller for Intel
Mobile Voltage Positioning (IMVP-II)
20
______________________________________________________________________________________
low during Impedance mode must appear to be low
impedance, at least for the 4μs sampling interval.
This can be achieved in several ways, including the fol-
lowing two (Figure 13). By using low-impedance pullup
resistors with the CPU
’
s VID pins, each pin provides the
low impedance needed for the mux to correctly inter-
pret the Impedance mode setting. Unfortunately, the
low resistances cause several mA quiescent currents
for each of the CPU
’
s grounded VID pins. This quies-
cent current can be avoided by taking advantage of the
fact that D0
–
D4 need only appear low impedance
briefly, not necessarily on a continuous DC basis. High-
impedance pullups can be used if they are bypassed
with a large enough capacitance to make them appear
low impedance for the 4μs sampling interval. As noted
in Figure 13, 4.7nF capacitors allow the inputs to
appear low impedance even though they are pulled up
with large-value resistors. Each sampling depletes
some charge from the 4.7nF capacitors. A minimum
26k
D4
D3
D2
D1
D0
26k
26k
26k
26k
8k
100k
8k
8k
8k
8k
3.0V TO 5.5V
100k
+5V
B-DATA
LATCH
V
CC
GND
MAX1718
Figure 10. Internal Mux Impedance-Mode Data Test and Latch
MAX1718
D4
D3
D2
D1
D0
ZMODE
3.0V TO 5.5V
ZMODE HIGH
VID = 01010
1.25V
ZMODE LOW
VID = 01100
1.15V
100k
100k
ZMODE = HIGH = 1.25V
ZMODE = LOW = 1.15V
Figure 11. Using the Internal Mux with Hard-Wired Logic-Mode
and Impedance-Mode DAC Codes
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1718BEEI | Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II |
| MAX1720EUTG | Switched Capacitor Voltage Inverter with Shutdown |
| MAX1724EZK50 | 1.5uA IQ, Step-Up DC-DC Converters in Thin SOT23-5 |
| MAX1724EZK30 | 1.5uA IQ, Step-Up DC-DC Converters in Thin SOT23-5 |
| MAX1724EZK30-T | 1.5uA IQ, Step-Up DC-DC Converters in Thin SOT23-5 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1718BEEI | 制造商:Maxim Integrated Products 功能描述:NOTEBOOK CPU STEP-DOWN CONTROLLER FOR INTEL M - Rail/Tube |
| MAX1718BEEI+ | 制造商:Maxim Integrated Products 功能描述:NOTEBOOK CPU STEP-DOWN CONTROLLER FOR INTEL MOBILE VOLTAGE - Rail/Tube |
| MAX1718BEEI-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1718EEI | 制造商:Maxim Integrated Products 功能描述:NOTEBOOK CPU STEP-DOWN CONTROLLER FOR INTEL M - Bulk |
| MAX1718EEI+ | 制造商:Maxim Integrated Products 功能描述:LDO CNTRLR STDN 0.6V TO 1.75V 28QSOP - Rail/Tube |
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