- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385241 > CMPWR100S Analog IC PDF資料下載
參數(shù)資料
| 型號： | CMPWR100S |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 9/10頁 |
| 文件大小： | 119K |
| 代理商： | CMPWR100S |
2000 California Micro Devices Corp. All rights reserved.
10/20/2000
9
CMPWR100
CALIFORNIA MICRO DEVICES
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
Typical Thermal Characteristics
continued
Thermal dissipation of junction heat consists primarily of
two paths in series. The first path is the junction to the
case (
θ
) thermal resistance, which is defined by the
package style, and the second path is the case to
ambient (
θ
) thermal resistance, which is dependent on
board layout and construction.
For a given package style and board layout, the operat-
ing junction temperature is a function of junction power
dissipation P
, and the ambient temperature, resulting
in the following thermal equation:
T
JUNC
= T
AMB
+ P
JUNC
(
θ
JC
) + P
JUNC
(
θ
CA
)
The 8 lead narrow SOIC style package has
θ
of 60
°
C/
W. When mounted on a printed circuit board with a heat-
spreading ability equivalent to 2 square inches of
copper, the resulting
θ
CA
is approximately 40
°
C/W.
Based on maximum power dissipation of 0.4W
(2Vx200mA) with an ambient of 70
°
C the resulting
junction temperature will be:
T
JUNC
= T
AMB
+ P
JUNC
(
θ
JC
) + P
JUNC
(
θ
CA
)
= 70
°
C + 0.4W (60
°
C/W) + 0.4W (40
°
C/W)
= 70
°
C + 24
°
C + 16
°
C
= 110
°
C
The CMPWR100 can therefore be operated at full rated
load conditions when provided with a case to ambient
thermal resistance of 40
°
C/W. Most multi-layer boards
using power plane construction will readily provide this
acceptable thermal environment.
Measurements showing performance up to maximum
junction temperature of 125
°
C were performed under
light load conditions (5mA). This allows the ambient
temperature to be representative of the internal junction
temperature.
Output Voltage vs. Temperature.
This shows the
regulator V
performance over the temperature range
for lightly loaded conditions (5mA).
An overall peak to peak variation of less than 15mV
occurs over the 100
°
C change in junction temperature
which equates to a voltage temperature coefficient of
50ppm/
°
C.
3.34
3.32
3.30
3.28
3.260
25
5mA Load
50
Junction Temperature (C)
V
75
100
Auxiliary Switch Resistance
is shown over the normal
operating temperature range.
The auxiliary switch resistance has a variation of
approximately 0.05
over the 100
°
C change in junction
temperature.
Regulator Output Voltage
Auxiliary Switch Resistance
0.30
0.25
0.20
0.15
0.100
25
50
Ambient Temperature (
C)
R
)
75
100
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CMS409-7 | x18 Fast Page Mode DRAM Module |
| CMS409-8 | x18 Fast Page Mode DRAM Module |
| CMX208 | ISDN Dual Telephony Protocol Engine?? |
| CMX218 | ISDN Data and Telephony-Protocol Engine??? |
| CMX228 | ISDN Protocol Engine? D-Channel Data?? |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CMPWR100S/R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| CMPWR100S/T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| CMPWR101 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:250mA SmartORTM Regulator with VAUX Switch |
| CMPWR101R | 功能描述:低壓差穩(wěn)壓器 - LDO 250mA Regulator with Vaux Switch 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 |
| CMPWR101S | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:250mA SMARTOR Regulator with V switch |
發(fā)布緊急采購，3分鐘左右您將得到回復。