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| 型號： | LM4040EIZ-2.5 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 240 x 64 pixel format, CFL, LED, or EL Backlight available |
| 中文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3 |
| 封裝： | PLASTIC, TO-92, 3 PIN |
| 文件頁數(shù)： | 26/39頁 |
| 文件大小： | 482K |
| 代理商： | LM4040EIZ-2.5 |
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Cathode and Load Currents
In a typical shunt-regulator configuration (see
Figure 9
), an external resistor, R
, is connected between the
supply and the cathode of the LM4040. R
S
must be set properly, as it sets the total current available to supply
the load (I
L
) and bias the LM4040 (I
Z
). In all cases, I
Z
must stay within a specified range for proper operation of
the reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum I
L
and minimum V
S
), R
S
must be small enough to supply the minimum I
Z
required for operation of the regulator, as
given by data-sheet parameters. At the other extreme, maximum V
S
and minimum I
L
, R
S
must be large enough
to limit I
Z
to less than its maximum-rated value of 15 mA.
R
S
is calculated according to
Equation 1
:
R
S
V
S
(I
L
V
Z
I
Z
)
(1)
LM4040
I
Z
+ I
L
I
L
I
Z
V
S
V
Z
R
S
LM4040
PRECISION MICROPOWER SHUNT VOLTAGE REFERENCE
SLOS456I–JANUARY 2005–REVISED DECEMBER 2005
APPLICATION INFORMATION (continued)
Figure 9. Shunt Regulator
26
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4040EIZ-3.0/NOPB | 功能描述:IC VREF SHUNT PREC 3V TO-92-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準(zhǔn) 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 基準(zhǔn)類型:旁路，精度 輸出電壓:5V 容差:±0.5% 溫度系數(shù):100ppm/°C 輸入電壓:- 通道數(shù):1 電流 - 陰極:80µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應(yīng)商設(shè)備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| LM4040QAIM3-2.5/NOPB | 制造商:Texas Instruments 功能描述:IC VREF SHUNT PREC 2.5V SOT23-3 制造商:Texas Instruments 功能描述:Precision Micropower Shunt Voltage Refer |
| LM4040QAIM3X2.5/NOPB | 制造商:Texas Instruments 功能描述:IC VREF SHUNT PREC 2.5V SOT23-3 制造商:Texas Instruments 功能描述:Precision Micropower Shunt Voltage Refer |
| LM4040QBIM3-2.5/NOPB | 制造商:Texas Instruments 功能描述:IC VREF SHUNT PREC 2.5V SOT23-3 |
| LM4040QBIM3X2.5/NOPB | 制造商:Texas Instruments 功能描述:IC VREF SHUNT PREC 2.5V SOT23-3 制造商:Texas Instruments 功能描述:Precision Micropower Shunt Voltage Refer |
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