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參數(shù)資料
| 型號(hào)： | MAX608 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 5V or Adjustable, Low-Voltage, Step-Up DC-DC Controller(升壓型，輸出電壓5V/可調(diào),輸出電流1A的DC-DC變換器) |
| 中文描述： | 5V或可調(diào)、低電壓、升壓型DC-DC控制器 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 164K |
| 代理商： | MAX608 |
current will ramp up to a high level before the current-lim-
it comparator can turn off the switch. The minimum on-time
for the switch (t
ON
(min)) is approximately 2μs; select an
inductor that allows the current to ramp up to I
LIM
.
The standard operating circuits use a 22μH inductor.
If a different inductance value is desired, select L such
that:
V
(max) x 2μs
L
≥
—————----—--
I
LIM
Larger inductance values tend to increase the start-up
time slightly, while smaller inductance values allow the
coil current to ramp up to higher levels before the
switch turns off, increasing the ripple at light loads.
Inductors with a ferrite core or equivalent are recom-
mended; powder iron cores are not recommended for
use with high switching frequencies. Make sure the
inductor’s saturation current rating (the current at which
the core begins to saturate and the inductance starts to
fall) exceeds the peak current rating set by R
SENSE
.
However, it is generally acceptable to bias the inductor
into saturation by approximately 20% (the point where
the inductance is 20% below the nominal value). For
highest efficiency, use a coil with low DC resistance,
preferably under 20m
. To minimize radiated noise,
use a toroid, a pot core, or a shielded coil.
Table 1 lists inductor suppliers and specific recom-
mended inductors.
M
5V or Adjustable, Low-Voltage,
S tep-Up DC-DC Controller
_______________________________________________________________________________________
9
M
0
INPUT VOLTAGE (V)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
2
3
4
5
R
SENSE
= 20m
R
SENSE
= 25m
R
SENSE
= 35m
R
SENSE
= 100m
R
SENSE
= 50m
V
= 5V
L = 22
μ
H
M
0
INPUT VOLTAGE (V)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
2
4
6
8
10
12
R
SENSE
= 100m
R
SENSE
= 50m
R
SENSE
= 20m
R
SENSE
= 25m
R
SENSE
= 35m
V
= 12V
L = 22
μ
H
Figure 4b. Maximum Output Current vs. Input Voltage
(V
OUT
= 5V)
Figure 4c. Maximum Output Current vs. Input Voltage
(V
OUT
= 12V)
Figure 4d. Maximum Output Current vs. Input Voltage
(V
OUT
= 15V)
Figure 4a. Maximum Output Current vs. Input Voltage
(V
OUT
= 3.3V)
M
0
INPUT VOLTAGE (V)
0.5
1.0
1.5
2.0
2.5
3.0
3.5
2
4
6
8
10
12
14
16
R
SENSE
= 100m
R
SENSE
= 50m
V
= 15V
L = 22
μ
H
R
SENSE
= 20m
R
SENSE
= 25m
R
SENSE
= 35m
M
0
2.0
INPUT VOLTAGE (V)
2.0
2.5
3.0
3.5
0.5
1.0
1.5
V
OUT
= 3.3V
L = 22
μ
H
R
SENSE
= 100m
R
SENSE
= 50m
R
SENSE
= 25m
R
SENSE
= 35m
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX608C/D | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| MAX608C/D+ | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| MAX608EPA | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| MAX608EPA+ | 功能描述:DC/DC 開(kāi)關(guān)控制器 5V or Adjustable Step-Up DC/DC Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| MAX608ESA | 功能描述:DC/DC 開(kāi)關(guān)控制器 5V or Adjustable Step-Up DC/DC Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
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