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參數(shù)資料
| 型號： | ML6553 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Bus Termination Regulator |
| 中文描述： | 總線終端穩(wěn)壓器 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 115K |
| 代理商： | ML6553 |
ML6553
PRODUCT SPECIFICATION
6
REV. 1.0.2 3/21/01
Output Current Capability
The maximum current available at the output of the regulator
is related to the DC resistance of the inductor, the source
impedance of the ML6553, and the desired regulation. The
source impedance of the ML6553 can be estimated at 20m
with an initial output voltage accuracy of ±1%. So the maxi-
mum output current can be estimated using:
So, for an inductor with 11m
voltage of 1.25V, and a desired output voltage accuracy of
3%:
DC resistance, a termination
This is enough current capability to terminate 50 bus lines,
assuming 16mA of drive current per line.
Since the feedback loop is closed internally on the ML6553
the total series resistance of the L/C output filter contributes
to increased deviation from no load to full load. The output
source impedance of the ML6553 is approximately 20m
A 1A load current yields 11mV (from L1) in output
deviation +20mV from the ML6553. Be sure to factor in the
component ESR values when constrained to a particular
maximum output deviation. Adequately bypass the V
output with SMD film capacitors to reduce transients
generated by stray lead inductance.
.
TT
I
OUT MAX
)
DESIRED
------------------------------------------–
INITIAL
0.020
(
)
L
DCR
+
≈
V
TT
×
I
OUT MAX
)
0.020
+
)
1.25
)
×
×
0.011
100
-----------------–
=
(2)
0.806A
=
Figure 2. Application Schematic
Figure 3. ML6553 Board Layout
1
2
3
4
8
7
6
5
VCCQ
VCCQ/2
AGND
AVCC
DGND
VL
VL
PVDD
U1
ML6553
VCCQ
2.5V
VCCQ/2
GND
PVDD
3.3V
VTT
R1
1k
R2
100
C1
0.1
μ
F
C2
0.1
μ
F
C3
0.1
μ
F
C6
0.1
μ
F
C4
100
μ
F
C5
330
μ
F
OS-CON
L1
4.7
μ
H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML65541 | High Speed Octal Buffer/Line Drivers(高速八通道緩沖收發(fā)器) |
| ML65L541 | High Speed Octal Buffer/Line Drivers(高速八通道緩沖收發(fā)器) |
| ML6554CU | 3A Bus Termination Regulator |
| ML6554IU | 3A Bus Termination Regulator |
| ML6554 | 3A Bus Termination Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML6553CS1 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Bus Termination 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 |
| ML6553CS-1 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Bus Termination Regulator |
| ML6553CS1X | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Bus Termination 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 |
| ML6554 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:3A Bus Termination Regulator |
| ML65541 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Speed Octal Buffer/Line Drivers |
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