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參數(shù)資料
| 型號： | LM133K |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 3-Ampere Adjustable Negative Regulators |
| 中文描述： | 1.2 V-32 V ADJUSTABLE NEGATIVE REGULATOR, MBFM2 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 268K |
| 代理商： | LM133K |
Typical Applications
(Continued)
THERMAL REGULATION
When power is dissipated in an IC, a temperature gradient
occurs across the IC chip affecting the individual IC circuit
components. With an IC regulator, this gradient can be espe-
cially severe since the power dissipation is large. Thermal
regulation is the effect of these temperature gradients on
output voltage (in percentage output change) per watt of
power change in a specified time. Thermal regulation error is
independent of electrical regulation or temperature coeffi-
cient, and occurs within 5 ms to 50 ms after a change in
power dissipation. Thermal regulation depends on IC layout
as well as electrical design. The thermal regulation of a volt-
age regulator is defined as the percentage change of V
,
per watt, within the first 10 ms after a step of power is ap-
plied. The LM133’s specification is 0.01%/W, max.
In Figure 1 a typical LM133’s output drifts only 2 mV (or
0.02% of V
= 10V) when a 20W pulse is applied for 10
ms. This performance is thus well inside the specification
limit of 0.01%/Wx20W = 0.2% max. When the 20W pulse is
ended, the thermal regulation again shows a 2 mV step as
the LM133 chip cools off. Note that the load regulation error
of about 1 mV (0.01%) is additional to the thermal regulation
error. In Figure 2 when the 20W pulse is applied for 100 ms,
the output drifts only slightly beyond the drift in the first 10
ms, and the thermal error stays well within 0.1% (10 mV).
Adjustable Lab Voltage Regulator
DS009065-12
*
The 10 μF capacitors are optional to improve ripple rejection.
Adjustable Current Regulator
DS009065-13
*
0.5
≤
R1
≤
24
DS009065-14
FIGURE 1.
www.national.com
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| LM133K/883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:VOLT REGULATOR|ADJUSTABLE|-1.2 TO -32V|BIPOLAR|TO-204/-3|3PIN|METAL |
| LM133SS1T60 | 制造商:SHARP 制造商全稱:Sharp Electrionic Components 功能描述:Color STN-LCD Module(Notebook PC) |
| LM134 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:THREE TERMINAL ADJUSTABLE CURRENT SOURCES |
| LM134_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:THREE TERMINAL ADJUSTABLE CURRENT SOURCES |
| LM134_05 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3-Terminal Adjustable Current Sources |
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