參數(shù)資料
型號(hào)： CM3121-02SB
廠(chǎng)商： California Micro Devices Corporation
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： Dual Linear Voltage Regulator for DDR-I and DDR-II Memory
中文描述： 雙線(xiàn)性穩(wěn)壓器，用于DDR I和DDR - II內(nèi)存
文件頁(yè)數(shù)： 6/11頁(yè)
文件大?。?/td> 219K
代理商： CM3121-02SB
2004 California Micro Devices Corp. All rights reserved.
6
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
11/12/04
CM3121
PRELIMINARY
Note 3: All parameters specified at T
A
= -40°C to +85°C unless otherwise noted.
Note 4: Note that the I
DDQ
current specified is the load current output from the V
DDQ
pin. V
DDQ
also supplies current internally to the
V
TT
regulator when it is sourcing current. The maximum source current can be up to 0.5A. So the maximum total current
from the V
DDQ
regulator is the external V
DDQ
current I
DDQ
added to the maximum V
TT
sourcing current I
TT
. All load currents
are specified as such, but the V
DDQ
current limit is specified at a current just above the total maximum current.
Table 1: Truth Table for CM3121
V
DDQ
Regulator Parameters
V
CC MIN
Input Voltage
V
DDQ
= 2.5V, I
DDQ
= 1.5A,
SENSE_V
DDQ
= 0V, Note 4
I
DDQ
= 0.01A,V
CC
= 3.3V,
SENSE_V
DDQ
= 0V, Note 4
V
CC
= 3.3V, SENSE_V
DDQ
tied to
external resistors R1 and R2, Note 4
2.2
V
V
DDQ
Default Output Voltage Range
1.75
1.80
1.85
V
V
DDQ ADJ
Adjustable Output Voltage
Range
1.6
2.8
V
V
DDQ LD
Load Regulation
T
A
= 25°C, V
CC
= 2.5V,
0.01A
≤
I
DDQ
≤
1.0A, Note 4
T
A
= 25°C, I
DDQ
= 0.01A,
2.2V
≤
V
CC
≤
2.8V, Note 4
BW = 10Hz - 100kHz, C
DDQ
= 10
μ
F
Note 4
-
-
2.5
%
V
DDQ LINE
Line Regulation
-1.0
-
1.0
%
e
N DDQ
I
DDQ LIM
I
DDQ SC
V
TT
Regulator Parameters
V
TT
Output Voltage Range
V
TT LD
Load Regulation
Output Noise Voltage
49
μ
Vrms
Current Limit
1.7
2.0
A
Short Circuit Current
V
DDQ
< 0.3V
0.5
A
V
DDQ
= 1.8V, I
TT
= 0.01A,
T
A
= 25°C, V
DDQ
= 1.8V,
0.01A
≤
I
TT
≤
±
0.3A
T
A
= 25°C, I
TT
= 0A,
2.2V
≤
V
CC
≤
2.8V
BW = 10Hz - 100kHz, C
TT
= 10
μ
F
0.86
0.90
0.94
V
-1.0
-
1.0
%
V
TT LINE
Line Regulation
-1.0
-
1.0
%
e
N TT
I
TT LIM
I
TT SC
Output Noise Voltage
51
μ
Vrms
Current Limit
0.4
0.6
A
Short Circuit Current
V
TT
< 0.3V
0.3
A
V
CC
(1)
2.8V to 3.6V
EN_DDR
V
DDQ OUT
V
DDQ
0V
V
TT OUT
V
DDQ
/ 2
0V
Low
X
High
ELECTRICAL OPERATING CHARACTERISTICS (CONT’D)
(SEE NOTE 3)
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CM3121-02SH 制造商:CALMIRCO 制造商全稱(chēng):California Micro Devices Corp 功能描述:Dual Linear Voltage Regulator for DDR-I and DDR-II Memory
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