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參數(shù)資料
| 型號： | ML4865CS-2 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Voltage High Current Boost Regulator |
| 中文描述： | 2 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 126K |
| 代理商： | ML4865CS-2 |
ML4865
PRODUCT SPECIFICATION
8
REV. 1.0.2 8/10/01
Design Example
In order to design a boost converter using the ML4865, it is
necessary to define the values of a few parameters. For this
example, assume the following design parameters:
First, it must be determined whether the ML4865 is capable
of delivering the output current without an external Schottky
rectifier. This is done using Equation 1:
Next, select an inductor. As previously mentioned, the rec-
ommended inductance is 22μH. Make sure that the peak cur-
rent rating of the inductor is at least 1.5A, and that the DC
resistance of the inductor is in the range of 110 to 220m
. A
Sumida CD75-220 meets these requirements.
Finally, the value of the output capacitor is determined using
Equation 2:
The closest standard value would be a 22μF capacitor with
an ESR rating of 200m
. An AVX TPSD226M025R0200
would be a good choice.
As mentioned previously, the use of an input supply bypass
capacitor is highly recommended. Since the output capaci-
tance meets the minimum input capacitance recommended it
can also be used for the input.
V
OUT
V
IN
= 4.75 to 5.25V
= 12V
I
OUT(MAX)
= 150mA
Shutdown required
I
mA
OUT MAX
(
)
.
12
.
.25
.
.
×
+
×
=
525
005 5
0 4
065
188
I
V
V
V
OUT MAX
(
IN
OUT
IN
)
.
.
.
×
×
+
×
005
0 4
065
(
(
(
(
(
(
(
(
C
OUT
V
OUT
=
=
=
10
×
L
12V
10
×
22
μ
H
18.3
μ
F
相關PDF資料 |
PDF描述 |
|---|---|
| ML4865 | High Voltage High Current Boost Regulator |
| ML4866 | 3.3V Output DC-DC Step-Down Converter(3.3V輸出的DC-DC步降變換器) |
| ML4869 | Medium Current Boost Regulator with Load Disconnect(負載可分離的中等電流升壓穩(wěn)壓器) |
| ML4870 | High Current Boost Regulator with Load Disconnect(負載可分離的大電流升壓穩(wěn)壓器) |
| ML4872 | High Current Boost Regulator with Shutdown(帶關斷電路的大電流升壓穩(wěn)壓器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ML4865CS2X | 功能描述:DC/DC 開關控制器 SOIC-8 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| ML4865ES-2 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Voltage High Current Boost Regulator |
| ML4866 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:3.3V Output DC-DC Step-Down Converter |
| ML4866CS | 制造商:MICRO_LINEAR 功能描述: |
| ML4866ES | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:3.3V Output DC-DC Step-Down Converter |
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