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參數(shù)資料
| 型號： | LM34910 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關穩(wěn)壓器 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大?。?/td> | 583K |
| 代理商： | LM34910 |
Pin Description
PIN
1
NAME
SW
DESCRIPTION
APPLICATION INFORMATION
Internally connected to the buck switch source.
Connect to the external inductor, diode, and boost
capacitor.
Connect a 0.022 μF capacitor from SW to this pin. An
internal diode charges the capacitor during the
off-time.
Internally the current sense resistor connects from this
pin to S
GND
. Re-circulating current flows out of this pin
to the free-wheeling diode. Current limit is set at
1.25A.
Re-circulating current flows into this pin to the current
sense resistor.
Ground for all internal circuitry other than the current
limit detection.
Internally connected to the regulation and over-voltage
comparators. The regulation level is 2.5V.
An internal 11.5 μA current source charges an external
capacitor to 2.5V to provide the softstart function.
An external resistor from V
IN
to this pin sets the buck
switch on-time. Grounding this pin shuts down the
regulator.
Nominally regulated to 7.0V. An external voltage
(8V-14V) can be connected to this pin to reduce
internal dissipation. An internal diode connects V
CC
to
V
IN
.
Nominal input range is 8.0V to 36V.
Switching Node
2
BST
Boost pin for boot-strap capacitor
3
I
SEN
Current sense input
4
S
GND
Sense Ground
5
RTN
Circuit Ground
6
FB
Feedback
7
SS
Softstart
8
R
ON
/SD
On-time Control and Shutdown
9
V
CC
Output from the start-up regulator
10
V
IN
Input supply voltage
L
www.national.com
3
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM34910C | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage (50V, 1.25A) Step Down Switching Regulator |
| LM34910CSD | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:STEP DOWN REG 50V 1.2A LLP-10 |
| LM34910CSD/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM34910CSDE | 制造商:Texas Instruments 功能描述:HIGH VOLTAGE (50V 1.25A) STEP DOWN SWITCHING REGULATOR |
| LM34910CSDE/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
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