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參數(shù)資料
| 型號(hào)： | SPX1117HM3-L-5-0 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 800mA Low Dropout Voltage Regulator |
| 中文描述： | 800mA的低壓差穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 8/16頁(yè) |
| 文件大?。?/td> | 470K |
| 代理商： | SPX1117HM3-L-5-0 |
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8
Apr 20-07 Rev B SPX1117 800mA Low Dropout Voltage Regulator
2007 Sipex Corporation
Output Voltage
The output of the adjustable regulator can be set
to any voltage between 1.25V and 15V. The
value of V
OUT
can be quickly approximated using
the formula
V
OUT
=1.25 *(R
1
+ R
2
)/R
1
.
A small correction to this formula is required
depending on the values of resistors R
and R
,
since the adjustable pin current (approx 50
μ
A)
flows through R
. When I
ADJ
is taken into ac-
count, the formula becomes
V
OUT
= V
REF
(1+ (R
2
/R
1
)) + I
ADJ
* R
2
,
where
V
REF
=1.25V.
Layout Considerations
Parasitic line resistance can degrade load regu-
lation. In order to avoid this, connect R
directly
to V
as illustrated in Figure 25. For the same
reason, R
should be connected to the negative
side of the load.
Figure 21. Current Source
Figure 22. Typical Adjustable Regulator
LOAD
ADJ
SPX1117
V
IN
C
1
OUT
IN
4.7
μ
F
C
2
I
OUT
R
1
V
REF
R
1
I
OUT
=
+
V
OUT
IN
OUT
I
ADJ
50
μ
A
SPX1117
C
1
R
1
R
2
V
OUT
V
IN
C
2
V
OUT
= V
REF
(1+R
2
/R
1
) +I
ADJ
R
2
V
REF
ADJ
4.7
μ
F +
APPLICATION INFORMATION: Continued
PC BOARD TOPSIDE COPPER BACKSIDE COPPER
THERMAL RESISTANCE
JUNC. TO AMB.
°
C/W
mm
2
2500
2500
2500
2500
2500
1600
2500
2500
1600
900
900
mm
2
2500
1250
950
2500
1800
600
1250
915
600
240
240
mm
2
2500
2500
2500
46
47
49
51
53
55
58
59
67
72
85
0
0
1600
0
0
0
900
0
TABLE 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SPX1117T-2-5 | 800mA Low Dropout Voltage Regulator |
| SPX1117T-2-85 | 800mA Low Dropout Voltage Regulator |
| SPX1117T-3-0 | 800mA Low Dropout Voltage Regulator |
| SPX1117T-3-3 | 800mA Low Dropout Voltage Regulator |
| SPX1117T-L | 800mA Low Dropout Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPX1117HM3-L-5-0/TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SPX1117M3 | 制造商:Exar Corporation 功能描述: 制造商:SIPEX 功能描述: 制造商:Exar Corporation 功能描述:1.25 V-15 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.3 V DROPOUT, 3 Pin Plastic SMT |
| SPX1117M3/TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SPX1117M3-1.5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:800mA Low Dropout Voltage Regulator |
| SPX1117M3-1.5/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:800mA Low Dropout Voltage Regulator |
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