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參數(shù)資料
| 型號： | MP1580HP |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2A, 380 KHz Step-Down Converter |
| 中文描述： | 3.6 A SWITCHING REGULATOR, 418 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 259K |
| 代理商： | MP1580HP |
MP1580 – 2A, 380KHz STEP-DOWN CONVERTER
MP1580 Rev. 3.0
12/5/2005
www.MonolithicPower.com
8
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2005 MPS. All Rights Reserved.
TM
Determine
capacitor, C6, is required. It is required if the
ESR zero of the output capacitor happens at
less than four times the crossover frequency.
Or:
if
the
second
compensation
1
f
R
2
C
8
C
ESR
≥
×
×
×
π
or
1
V
R
3
R
10
34
.
OUT
ESR
5
≥
×
×
×
If
compensation capacitor. Determine the value
by the equation:
this
is
the
case,
add
the
second
3
R
R
2
C
6
C
)
MAX
(
ESR
×
=
Where R
ESR(MAX)
is the maximum ESR of the
output capacitor.
For example:
V
OUT
= 3.3V
C2= 22μF Ceramic (ESR = 10m
)
=
×
×
×
×
≈
k
9
)
3
)
10
22
(
)
10
37
.
3
R
6
8
Use the nearest standard value of 10k
.
nF
6
10
10
3
×
)
10
22
(
22
.
3
C
3
6
=
×
×
×
>
Use a standard value of 2nF
014
.
f
R
2
C
2
C
ESR
=
×
×
×
π
which is less than 1, therefore no second
compensation capacitor is required.
Table 5—Recommended Components for
Standard Output Voltages
V
OUT
1.22V
1.5V
1.8V
2.5V
3.3V
5.0V
R1
0
L1 Minimum
6.8μH
6.8μH
10μH
10μH
15μH
22μH
2.32k
4.75k
10.5k
16.9k
30.9k
Negative Output Voltage
The MP1580 can be configured as a buck-
boost regulator to supply negative output
voltage.
Because the GND pin of the IC is now
connected to the negative output voltage, the
maximum allowable input voltage is the IC input
voltage rating (25V) minus the negative output
voltage value. A typical application circuit is
shown in Figure 3.
External Bootstrap Diode
It is recommended that an external bootstrap
diode be added when the system has a 5V
fixed input or the power supply generates a 5V
output. This helps improve the efficiency of the
regulator. The bootstrap diode can be a low
cost one such as IN4148 or BAT54.
MP1580
SW
BS
10nF
5V
MP1580_F02
Figure 2—External Bootstrap Diode
This diode is also recommended for high duty
cycle operation (when
IN
OUT
V
V
>65%) and high
output voltage (V
OUT
>12V) applications.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1580HP-LF | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A 380kHz Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MP1580HS | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 380 KHz Step-Down Converter |
| MP1580HS-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2A 380kHz Step-Down Converter 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 |
| MP1580HS-LF-Z | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A 380kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MP1582EN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2A 1.5MHz 28V Nonsync Buck 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 |
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