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参数资料
| 型号： | LM5008SDXEP |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.61 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | PLASTIC, LLP-8 |
| 文件页数： | 8/14页 |
| 文件大小： | 392K |
| 代理商： | LM5008SDXEP |
Pin Descriptions
Pin
Name
Description
Application Information
1
SW
Switching Node
Power switching node. Connect to the output inductor,
re-circulating diode, and bootstrap capacitor.
2
BST
Boost Pin (Boot–strap capacitor input)
An external capacitor is required between the BST
and the SW pins. A 0.01F ceramic capacitor is
recommended. An internal diode charges the
capacitor from V
CC.
3
R
CL
Current Limit OFF time set pin
Toff = 10-5 / (0.285 + (FB / 6.35 x 10 6 x R
CL))
A resistor between this pin and RTN sets the off-time
when current limit is detected. The off-time is preset
to 35s if FB = 0V.
4
RTN
Ground pin
Ground for the entire circuit.
5
FB
Feedback input from Regulated Output
This pin is connected to the inverting input of the
internal regulation comparator. The regulation
threshold is 2.5V.
6
R
ON/SD
On time set pin
Ton = 1.25 x 10-10 R
ON / VIN
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.
7
V
CC
Output from the internal high voltage series pass
regulator. Regulated at 7.0V.
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 0.1F decoupling capacitor
is recommended. Series pass regulator is current
limited to 10mA.
8
V
IN
Input voltage
Recommended operating range: 9.5V to 95V.
3
www.national.com
201876 Version 2 Revision 4
Print Date/Time: 2011/08/30 23:05:33
LM5008EP
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相关代理商/技术参数 |
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| LM5009 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:150 mA, 100V Step-Down Switching Regulator |
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| LM5009AEVAL/NOPB | 功能描述:电源管理IC开发工具 LM5009A EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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