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參數(shù)資料
| 型號： | LM25007MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 42V, 0.5A Step-Down Switching Regulator |
| 中文描述： | 0.9 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 615K |
| 代理商： | LM25007MM |
Pin Descriptions
Pin
1
Name
SW
Description
Application Information
Switching Node
Power switching node. Connect to the inductor,
bootstrap capacitor, and free-wheeling diode.
An external capacitor is required between the BST
and the SW pins. A 0.01μF ceramic capacitor is
recommended.
A resistor between this pin and RTN sets the
off-time when current limit is detected. The off-time
is preset to 17 μs if FB = 0V .
2
BST
Boost Boot–strap capacitor input
3
RCL
Current Limit OFF time programming pin
4
5
RTN
FB
Circuit Ground
Feedback Signal from Regulated Output
This pin is connected to the inverting input of the
internal regulation comparator. The regulation
threshold is 2.5V.
A resistor between this pin and VIN sets the switch
on-time as a function of Vin. The minimum
recommended on-time is 300ns at the maximum
input voltage.
If an auxiliary voltage is available to raise the
voltage on this pin above the regulation setpoint
(7V), the internal series pass regulator will
shutdown, reducing the IC power dissipation. Do not
exceed 14V. This output provides gate drive power
for the internal Buck switch. An internal diode is
provided between this pin and the BST pin. A local
0.1uF decoupling capacitor is recommended.
Recommended operating range: 9V to 42V.
Exposed metal pad on the LLP package underside.
It is recommended to connect this pad to the PC
board ground plane to aid in heat dissipation.
6
RON/SD
On-time set pin
7
VCC
Output from the internal high voltage bias
regulator.
8
-
VIN
EP
Input supply voltage
Exposed pad, underside of the LLP package
option
L
www.national.com
3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM25007MM/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 42V,0.5A STEP-DOWN SWITCHING REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM25007MMX | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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 |
| LM25007MMX/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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 |
| LM25007SD | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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 |
| LM25007SD/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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 |
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