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參數(shù)資料
| 型號(hào)： | NCV8503 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Micropower 400mA LDO Linear Regulators with ENABLE, DELAY, Adjustable RESET, and General Use Comparator(微功耗400mA，帶使能、延時(shí)、可調(diào)復(fù)位端與通用比較器的低壓差線性穩(wěn)壓器) |
| 中文描述： | 微功耗400mA的LDO線性穩(wěn)壓器用ENABLE，延遲，可調(diào)復(fù)位，和一般使用比較（微功耗為400mA，帶使能，延時(shí)，可調(diào)復(fù)位端與通用比較器的低壓差線性穩(wěn)壓器） |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 122K |
| 代理商： | NCV8503 |
NCV8503 Series
http://onsemi.com
11
Figure 22. 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
CALCULATING POWER DISSIPATION IN A
SINGLE OUTPUT LINEAR REGULATOR
The maximum power dissipation for a single output
regulator (Figure 23) is:
PD(max)
[VIN(max)
VIN(max)IQ
VOUT(min)]IOUT(max)
(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
RJA
TA
PD
(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 23. Single Output Regulator with Key
Performance Parameters Labeled
V
IN
V
OUT
}
HEAT SINKS
A heat sink 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
RCS
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 heat sink data sheets
of heat sink manufacturers.
RSA
(3)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCV8504 | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504_07 | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504PW25G | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504PW25R2G | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
| NCV8504PW33G | Micropower 400 mA LDO Linear Regulators with DELAY, Adjustable RESET, and General Use Comparator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCV8503_07 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Micropower 400 mA LDO Linear Regulators with ENABLE, DELAY, Adjustable RESET, and General Use Comparator |
| NCV8503PW25 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8503PW25G | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8503PW25R2 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCV8503PW25R2G | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 400mA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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