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參數(shù)資料
| 型號(hào)： | LM217LZ |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LOW CURRENT 1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| 中文描述： | 低電流為1.2V到37V可調(diào)電壓調(diào)節(jié)器 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大?。?/td> | 250K |
| 代理商： | LM217LZ |
LM217L/LM317L
4/10
Figure 1 :
Current Limit
Figure 2 :
Minimum Operating Current
APPLICATION INFORMATION
The LM317L provides an internal reference voltage of 1.25V between the output and adjustments
terminals. This is used to set a constant current flow across an external resistor divider (see fig. 4), giving
an output voltage V
O
of:
V
O
= V
REF
(1 + R
2
/R
1
) + I
ADJ
R
2
The device was designed to minimize the term I
ADJ
(100μA max) and to maintain it very constant with line
and load changes. Usually, the error term I
ADJ
× R
2
can be neglected. To obtain the previous requirement,
all the regulator quiescent current is returned to the output terminal, imposing a minimum load current
condition. If the load is insufficient, the output voltage will rise.
Since the LM317L is a floating regulator and "sees" only the input-to-output differential voltage, supplies
of very high voltage with respect to ground can be regulated as long as the maximum input-to-output
differential is not exceeded. Furthermore, programmable regulator are easily obtainable and, by
connecting a fixed resistor between the adjustment and output, the device can be used as a precision
current regulator. In order to optimize the load regulation, the current set resistor R
1
(see fig. 4) should be
tied as close as possible to the regulator, while the ground terminal of R
2
should be near the ground of the
load to provide remote ground sensing.
Figure 3 :
Basic Adjustable Regulator
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM217M | MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| LM217MDT | MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| LM217MS | MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| LM217MT | MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| LM217MX | MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM217LZ | 制造商:STMicroelectronics 功能描述:V REG ADJ +1.2/37V TO-92-3 217 |
| LM217LZ-AP | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 1.2-37V Adj Positive RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LM217LZ-TR | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 1.2-37V Adj Positive RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LM217M | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| LM217M_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Medium current 1.2 to 37 V adjustable voltage regulator |
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