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參數(shù)資料
| 型號： | NCV8501DADJR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Micropower 150 mA LDO Linear Regulators with ENABLE, DELAY, RESET, and Monitor FLAG |
| 中文描述： | 1.242 V-1.318 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8 |
| 封裝： | LEAD FREE,SOP-8 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 119K |
| 代理商： | NCV8501DADJR2G |
NCV8501 Series
http://onsemi.com
12
CALCULATING POWER DISSIPATION IN A
SINGLE OUTPUT LINEAR REGULATOR
The maximum power dissipation for a single output
regulator (Figure 20) is:
PD(max)
[VIN(max)
VIN(max)IQ
VOUT(min)]IOUT(max)
(eq. 1)
where:
V
IN(max)
is the maximum input voltage,
V
OUT(min)
is the minimum output voltage,
I
OUT(max)
is the maximum output current for the
application, and
I
Q
is the quiescent current the regulator consumes at
I
OUT(max)
.
Once the value of P
D(max)
is known, the maximum
permissible value of R
JA
can be calculated:
150
°
C
R JA
TA
PD
(eq. 2)
The value of R
JA
can then be compared with those in the
package section of the data sheet. Those packages with
R
JA
’s less than the calculated value in Equation 2 will keep
the die temperature below 150
°
C.
In some cases, none of the packages will be sufficient to
dissipate the heat generated by the IC, and an external
heatsink will be required.
SMART
REGULATOR
I
Q
Control
Features
I
OUT
I
IN
Figure 20. Single Output Regulator with Key
Performance Parameters Labeled
V
IN
V
OUT
}
Figure 21. 16 Lead SOW (Exposed Pad), JA as a
Function of the Pad Copper Area (2 oz. Cu
Thickness), Board Material = 0.0625 G10/R4
40
70
90
100
T
J
J
,
°
C
0
Copper Area (mm
2
)
200
400
800
80
60
50
600
HEATSINKS
A heatsink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R
JA
:
RJA
RJC
where:
R
JC
= the junctiontocase thermal resistance,
R
CS
= the casetoheatsink thermal resistance, and
R
SA
= the heatsinktoambient thermal resistance.
R
JC
appears in the package section of the data sheet. Like
R
JA
, it too is a function of package type. R
CS
and R
SA
are
functions of the package type, heatsink and the interface
between them. These values appear in heatsink data sheets
of heatsink manufacturers.
RCS
RSA
(eq. 3)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8501PDW100 | 功能描述:低壓差穩(wěn)壓器 - LDO 10V 150mA w/ENABLE RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8501PDW100G | 功能描述:低壓差穩(wěn)壓器 - LDO 10V 150mA w/ENABLE RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8501PDW100R2 | 功能描述:低壓差穩(wěn)壓器 - LDO 10V 150mA w/ENABLE RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8501PDW100R2G | 功能描述:低壓差穩(wěn)壓器 - LDO 10V 150mA w/ENABLE RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8501PDW25 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 150mA w/ENABLE RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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