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参数资料
| 型号： | LM5009SD |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 150 mA, 100V Step-Down Switching Regulator |
| 中文描述： | 0.37 A SWITCHING REGULATOR, DSO8 |
| 封装： | 4 X 4 MM, EXPOSED PAD, LLP-8 |
| 文件页数： | 8/14页 |
| 文件大小： | 647K |
| 代理商： | LM5009SD |
Pin Descriptions
Pin
Name
Description
Application Information
1
SW
Switching output
Power switching output. Connect to the inductor,
re-circulating diode, and bootstrap capacitor.
2
BST
Boost Pin
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
RCL
Current Limit off-time set pin
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
RON/SD
On-time set pin
A resistor between this pin and VIN sets the switch
on-time as a function of V
IN. The minimum
recommended on-time is 250ns at the maximum
input voltage. This pin can be used for remote
shutdown.
7
VCC
Output from the internal high voltage startup
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 required.
8
VIN
Input voltage
Recommended operating range: 9.5V to 95V.
EP
Exposed Pad (LLP Package only)
Exposed metal pad on the underside of the device.
It is recommended to connect this to the PC board
ground plane to aid in heat dissipation.
LM5009
www.national.com
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM5009SDC | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM5009SDC/NOPB | 功能描述:直流/直流开关转换器 150 MA 100V STEP-DWN SWITCHING REG RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM5009SDC/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| LM5009SDCNOPB | 制造商:NATIONAL 功能描述:Pb Free |
| LM5009SDCX | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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