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參數(shù)資料
| 型號(hào)： | ML4851 |
| 廠(chǎng)商： | Fairchild Semiconductor Corporation |
| 英文描述： | Low Current, Voltage Boost Regulator(小電流升壓穩(wěn)壓器) |
| 中文描述： | 低電流，電壓升壓穩(wěn)壓器（小電流升壓穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 8/9頁(yè) |
| 文件大小： | 141K |
| 代理商： | ML4851 |
ML4851
8
REV. 1.0 10/12/2000
TOP LAYER
BOTTOM LAYER
ML4851-3
ML4851-5
DESIGN CONSIDERATIONS
(Continued)
V
A
B
=
×
F
.2
Figure 6. Sample PC Board Layout
Table 1. Maximum Output Current and Efficiency vs. V
IN
V
IN
I
OUT
(mA)
EFFICIENCY PERCENTAGE
L = 10μH
1.0
1.5
2.0
24.2
68.0
123.1
78.3
79.9
80.3
L = 18μH
1.0
1.5
2.0
2.5
3.0
3.5
15.7
43.3
80.4
125.3
169.9
236.9
82.3
84.8
85.7
86.2
86.5
87.0
L = 33μH
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
9.1
24.8
47.4
74.5
106.9
147.5
190.0
227.8
83.5
87.0
88.6
89.5
90.3
90.8
91.4
92.1
L = 56μH
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.5
13.9
28.5
45.7
67.1
92.5
122.1
149.6
80.1
85.9
88.9
90.3
91.4
92.3
92.6
93.8
V
IN
I
OUT
(mA)
EFFICIENCY PERCENTAGE
L = 10μH
1.0
1.5
2.0
45.8
108.3
184.1
77.6
77.7
77.9
L = 18μH
1.0
1.5
2.0
2.5
3.0
30.1
70.9
125.5
185.7
243.4
82.5
83.5
83.9
84.5
85.4
L = 33μH
1.0
1.5
2.0
2.5
3.0
17.6
42.7
76.1
120.4
159.6
86.0
87.8
88.7
89.7
90.7
L = 56μH
1.0
1.5
2.0
2.5
3.0
10.6
25.9
47.6
75.8
108.0
85.2
89.1
90.8
92.0
93.1
R
R
IN MIN
(
I
)
1
(6)
LAYOUT
Good PC board layout practices will ensure the proper
operation of the ML4851. Important layout considerations
include:
n
Use adequate ground and power traces or planes
n
Keep components as close as possible to the ML4851
n
Use short trace lengths from the inductor to the V
L
pin
and from the output capacitor to the V
OUT
pin
n
Use a single point ground for the ML4851 PWR GND
pin and the input and output capacitors, and connect
GND to PWR GND with a separate trace
A sample PC board layout is shown in Figure 6.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4851CS-3 | 制造商:MICRO-LINEAR 制造商全稱(chēng):MICRO-LINEAR 功能描述:Low Current, Voltage Boost Regulator |
| ML4851CS3X | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML4851CS3X_NL4C0095 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML4851CS-5 | 制造商:MICRO-LINEAR 制造商全稱(chēng):MICRO-LINEAR 功能描述:Low Current, Voltage Boost Regulator |
| ML4851CS8-3 UP WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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