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參數(shù)資料
| 型號： | CM3106-12SH |
| 廠商： | California Micro Devices Corporation |
| 英文描述： | 2 Amp Source/ Sink Bus Termination Regulator |
| 中文描述： | 2安培源/匯總線終端穩(wěn)壓器 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 987K |
| 代理商： | CM3106-12SH |
2004 California Micro Devices Corp. All rights reserved.
02/02/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L
Tel: 408.263.3214
L
Fax: 408.263.7846
L
www.calmicro.com
7
CM3106
Performance Information (cont’d)
Typical Thermal Characteristics (nominal conditions unless otherwise specified)
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
)
When a CM3106-12SN is mounted on a double sided
printed circuit board with two square inches of copper
allocated for "heat spreading", the resulting
θ
JA
is
151°C/W. Based on the over temperature limit of 150°C
with an ambient of 70°C, the available power of this
package will be:
P
D
= (150°C - 85°C) / 151°C/W = 0.43W
Since the
θ
JA
of the CM3106-12SB (PSOP) is 40°C/W,
the available power for this package will be:
P
D
= (150°C - 85°C) / 40°C/W = 1.625W
DDR Memory Application
Since the output voltage is 1.25V, and the device can
either source current from V
DD
or sink current to
Ground, the power dissipated in the device at any time
is 1.25V times the current load. This means the the
maximum average RMS current (in either direction) is
0.344A for the CM3106-12SN and 1.3A for the
CM3106-12SB. The maximum instantaneous current is
specified at 2A, so this condition should not be
exceeded for more than 17% of the time for the
CM3106-12SN and 65% of the time for the CM3106-
12SB. It is highly unlikely in most usage of DDR mem-
ory that this might occur, because it means the DDR
memory outputs are either all high or all low for 17%
(SOIC) and 65% (PSOP) of the time.
If the ambient temperature is 40°C instead of 85°C,
which is typically the maximum in most DDR memory
applications, the power dissipated (P
D
) can be 0.73W,
for the CM3106-12SN and 2.75W for the CM3106-
12SB. So the maximum average RMS current
increases from 0.42A to 0.58A for the CM3106-12SN
and a maximum instantaneous current of 2A should
not be exceeded for more than 29% of the time. For
CM3106-12SB, the maximum RMS current increases
from 1.3A to 2.2A. Thus, the maximum continuous cur-
rent can be 2A all the time.
Figure 10. Duty Cycle vs. Ambient
Temperature (I
LOAD
=2.0A)
Figure 11. Duty Cycle vs. Output
Current (Temp=70
°
C)
相關PDF資料 |
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|---|---|
| CM3106-12SM | 2 Amp Source/ Sink Bus Termination Regulator |
| CM3106-12SN | 2 Amp Source/ Sink Bus Termination Regulator |
| CM3107 | 2 Amp Source/ Sink Bus Termination Regulator for DDR Memory and Front Side Bus Applications |
| CM3107-00SB | 2 Amp Source/ Sink Bus Termination Regulator for DDR Memory and Front Side Bus Applications |
| CM3107-00SH | 2 Amp Source/ Sink Bus Termination Regulator for DDR Memory and Front Side Bus Applications |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CM3106-12SM | 功能描述:線性穩(wěn)壓器 - 標準 2A Sink/S DDR 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 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| CM3106-12SN | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:2 Amp Source/ Sink Bus Termination Regulator |
| CM3106F10SL-3 | 制造商:EPIC 功能描述:CLAMP STRAIGHT 10SL-3 制造商:EPIC 功能描述:CLAMP, STRAIGHT, 10SL-3 |
| CM3106F10SL-4 | 制造商:Lapp Group 功能描述:CLAMP STRAIGHT 10SL-4 |
| CM3106F14S-6 | 制造商:Lapp Group 功能描述:CLAMP STRAIGHT 14S-6 制造商:Lapp Group 功能描述:CLAMP, STRAIGHT, 14S-6 制造商:CONTACT CONNECTORS 功能描述:CLAMP, STRAIGHT, 14S-6, Series:EPIC, For Use With:CM1 Multipole Circular Connect |
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