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參數(shù)資料
| 型號(hào)： | CM3014 |
| 廠商： | California Micro Devices Corporation |
| 英文描述： | MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| 中文描述： | 微功耗，150mA的低壓差型CMOS穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 250K |
| 代理商： | CM3014 |
2002 California Micro Devices Corp. All rights reserved.
8
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L
Tel: 408.263.3214
L
Fax: 408.263.7846
L
www.calmicro.com
12/13/02
%'%)1*
&&
The overall junction to ambient thermal resistance
(
θ
JA
) for device power dissipation (P
D
) consists prima-
rily of two paths in series. The first path is the junction
to the case (
θ
JC
) which is defined by the package style,
and the second path is case to ambient (
θ
CA
) thermal
resistance which is dependent on board layout. The
final operating junction temperature for any set of con-
ditions can be estimated by the following thermal equa-
tion:
T
JUNC
= T
AMB
+ P
D
(
θ
JC
) + P
D
(
θ
CA
)
= T
AMB
+ P
D
(
θ
JA
)
The CM3014 uses a SOT23-5 package. When this
package is mounted on a double-sided printed circuit
board with two square inches of copper allocated for
"heat spreading", the resulting
θ
JA
is 175
°
C/W.
Based on a maximum power dissipation of 320mW
(Load x Vin-Vout = 150mA x 2.2V) with an ambient of
70
°
C the resulting junction temperature will be:
T
JUNC
= T
AMB
+ P
D
(
θ
JA
)
= 70
°
C + 315mW
(175
°
C/W)
= 70
°
C + 57.75
°
C = 127.75
°
C
() ) '
' ) " ) 9
)F<9$)&
Measurements showing performance up to a junction
temperature of 125
°
C were performed under light load
conditions (1mA). This allows the ambient temperature
to be representative of the internal junction tempera-
ture.
Note:
The use of multi-layer board construction with
separate ground and power planes will further enhance
the overall thermal performance. In the event of no
copper area being dedicated for heat spreading, a
multi-layer board construction using only the minimum
size pad layout will typically provide the CM3014 with
an overall
θ
JA
of 175
°
C/W, which allows up to 450mW
to be dissipated safely.
7 /8( ) 29
))9)/8-)
9
Output Voltage Change vs. Temperature (1mA Load)
-50
-40
-30
-20
-10
0
10
20
30
40
50
-50
-25
0
25
50
75
100
125
TEMPERATURE [
o
C]
O
Ground Current vs. Temperature
0
20
40
60
80
100
0
25
50
75
100
125
JUNCTION TEMPERATURE [
o
C]
G
相關(guān)PDF資料 |
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| CM3014-15ST | MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| CM3014-18ST | MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| CM3014-25ST | MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CM3014-15ST | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| CM3014-18ST | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| CM3014-25ST | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| CM3014-28ST | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
| CM3014-29ST | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:MICROPOWER, 150MA LOW DROPOUT CMOS REGULATOR |
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