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參數(shù)資料
| 型號(hào)： | LM5008 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High Voltage (100V) Step Down Switching Regulator |
| 中文描述： | 高電壓（100V的）降壓開關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 3/15頁(yè) |
| 文件大?。?/td> | 278K |
| 代理商： | LM5008 |
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Pin Description
PIN
1
NAME
SW
DESCRIPTION
APPLICATION INFORMATION
Power switching node. Connect to the output
inductor, re-circulating diode, and bootstrap
capacitor.
An external capacitor is required between the BST
and the SW pins. A 0.01μF ceramic capacitor is
recommended. An internal diode charges the
capacitor from V
CC
.
A resistor between this pin and RTN sets the
off-time when current limit is detected. The off-time
is preset to 35μs if FB = 0V.
Ground for the entire circuit.
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 V
IN
sets the switch
on time as a function of V
IN
. The minimum
recommended on time is 400ns at the maximum
input voltage. This pin can be used for remote
shutdown.
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 voltage provides gate drive power
for the internal Buck switch. An internal diode is
provided between this pin and the BST pin. A local
0.1μF decoupling capacitor is recommended. Series
pass regulator is current limited to 10mA.
Recommended operating range: 9.5V to 95V.
Switching Node
2
BST
Boost Pin (Boot–strap capacitor input)
3
R
CL
Current Limit OFF time set pin
Toff = 10
-5
/ (0.285 + (FB / 6.35 x 10
6
x R
CL
))
4
5
RTN
FB
Ground pin
Feedback input from Regulated Output
6
R
ON
/SD
On time set pin
Ton = 1.25 x 10
-10
R
ON
/ V
IN
7
V
CC
Output from the internal high voltage series pass
regulator. Regulated at 7.0V.
8
V
IN
Input voltage
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 |
|---|---|
| LM5008_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage (100V) Step Down Switching Regulator |
| LM5008A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:100V, 350 mA Constant On-Time Buck Switching Regulator |
| LM5008AEVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM5008A EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM5008AMM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:100V, 350 mA Constant On-Time Buck Switching Regulator |
| LM5008AMM/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 100V,350Ma Buck Reg 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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