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參數(shù)資料
| 型號(hào)： | LM237 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Adjustable 3-Terminal Regulators(3端可調(diào)穩(wěn)壓器) |
| 中文描述： | 可調(diào)三端穩(wěn)壓器（三端可調(diào)穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 245K |
| 代理商： | LM237 |
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Figure 1.
Figure 2.
When power is dissipated in an IC, a temperature
gradient occurs across the IC chip affecting the in-
dividual IC circuit components. WithanICregulator,
this gradient can be especially severe since power
dissipation is large.
Thermal regulation is the effect of these tempera-
ture gradients on output voltage (inpercentage out-
put change)per watt of power change ina specified
time. Thermal regulation error is independent of
electrical regulation or temperature coefficient, and
occurswithin5ms to 50ms after a change inpower
dissipation. Thermal regulation depends on IC
layoutaswell aselectricaldesign. The thermalregu-
lation of a voltage regulator is defined as the per-
centage changeofV
O
, perwatt,withinthefirst10ms
aftera step of power, is applied.
The LM137 specification is 0.02 %/W max.In figure
1, atypicalLM337’s output drifts only3mVfor0.03%
of V
O
= – 10V) when a 10W pulse is applied for
10ms.This performance is thus well inside thespe-
cificationlimitof0.02%/Wx10W =0.2%max.When
the10W pulse isendedthethermal regulation again
shows a 3mV step as the LM137 chip cools off.
Note that the load regulation error of about
8mV(0.08%) is additional to the thermal regulation
error.
In figure 2, when the 10W pulse is applied for
100ms,the outputdrifts onlyslightly beyond the drift
in the first 10ms and the thermal error stays well
within 0.1% (10mV).
LM 337, V
0
= – 10V
V
I
– V
0
= – 40V
I
L
= 0A
→
0.25A
→
0A
Vertical sensitivity 5mV/div.
LM 337, V
0
= – 10V
V
I
– V
0
= – 40V
I
L
= 0A
→
0.25A
→
0A
Horizontal sensitivity 20msN/div.
THERMAL REGULATION
LM137-LM237-LM337
7/14
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM137 | Three Terminal Adjustable Negative Voltage Regulator(三端可調(diào)負(fù)電壓穩(wěn)壓器) |
| LM238K | THREE-TERMINAL 5 A ADJUSTABLE VOLTAGE REGULATORS |
| LM238 | Very Low Drop Voltage Regulator with Inhabit(帶禁止的低壓差電壓穩(wěn)壓器) |
| LM138 | Very Low Drop Voltage Regulator with Inhabit(帶禁止的低壓差電壓穩(wěn)壓器) |
| LM338 | Very Low Drop Voltage Regulator with Inhabit(帶禁止的低壓差電壓穩(wěn)壓器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM237_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-TERMINAL ADJUSTABLE REGULATORS |
| LM237H | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE |
| LM237HVK | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| LM237K | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 1.2-37V Adj Negative 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 |
| LM237KC | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 3-Terminal Adj 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 |
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