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參數(shù)資料
| 型號(hào)： | LM2991WG-QML |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Negative Low Dropout Adjustable Regulator |
| 中文描述： | 2 V-25 V ADJUSTABLE NEGATIVE LDO REGULATOR, 1 V DROPOUT, CDSO16 |
| 封裝： | CERAMIC, SOIC-16 |
| 文件頁(yè)數(shù)： | 6/11頁(yè) |
| 文件大小： | 338K |
| 代理商： | LM2991WG-QML |
Application Hints
(Continued)
greater range of 2V to 25V. The adjust pin current is about
60 nA, causing a slight error in the output voltage. However,
using resistors lower than 100 k
makes the adjust pin cur-
rent negligible. For example, neglecting the adjust pin cur-
rent, and setting R2 to 100 k
and V
OUT
to 5V, results in an
output voltage error of only 0.16%.
ON/OFF PIN
The LM2991 regulator can be turned off by applying a TTL or
CMOS level high signal to the ON/OFF pin (see Adjustable
Current Sink Application).
Typical Applications
FORCING THE OUTPUT POSITIVE
Due to an internal clamp circuit, the LM2991 can withstand
positive voltages on its output. If the voltage source pulling
the output positive is DC, the current must be limited to 1.5A.
A current over 1.5A fed back into the LM2991 could damage
the device. The LM2991 output can also withstand fast posi-
tive voltage transients up to 26V, without any current limiting
of the source. However, if the transients have a duration of
over 1 ms, the output should be clamped with a Schottky di-
ode to ground.
Fully Isolated Post-Switcher Regulator
DS011260-6
Adjustable Current Sink
DS011260-10
www.national.com
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM299AH | 制造商:National Semiconductor 功能描述:299 制造商:Texas Instruments 功能描述: |
| LM299AH-20 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| LM299H | 制造商:Texas Instruments 功能描述: |
| LM299IT | 制造商:Texas Instruments 功能描述: |
| LM2A | 制造商:BACO Controls Inc 功能描述:Joysticks 2 |
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