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參數(shù)資料
| 型號： | SPX2810T/TR |
| 元件分類： | 可調(diào)正電壓單路輸出LDO穩(wěn)壓器 |
| 英文描述： | 1.25 V-10 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSSO3 |
| 封裝： | TO-263AA, 3 PIN |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 106K |
| 代理商： | SPX2810T/TR |
6
Date: 9/8/04
SPX2810 / SPX2810A 1A Low Dropout Linear Regulator
Copyright 2004 Sipex Corporation
Figure 11. 12.5V Regulator with Shutdown
Figure 10. Improving Ripple Rejection
Figure 12. Recommended Connections for Best Results
Output Voltage
The output of the adjustable regulator can be set to any voltage between 1.25V and 10V. The value
of V
OUT can be quickly approximated using the formula (Figure 9)
V
OUT=1.25 *(R1 + R2)/R1.
A small correction to this formula is required depending on the values of resistors R1 and R2, since
adjustable pin current (approx 50
A) flows through R2. When I
ADJ is taken into account, the formula
becomes
V
OUT = VREF(1+ (R2/R1)) + IADJ * R2, where VREF=1.25V.
Layout Considerations
Parasitic line resistance can degrade load regulation. In order not to affect the behavior of the regulator,
it is best to connect R
1 to the case as illustrated in Figure 11. For the same reason, R2 should be
connected to the negative side of the load.
SPX2810
V
IN
R 2
R 1
Connect R
2
to Load
R L
Connect R1 to
Case of Regulator
RP Parasitic Line
Resistance
V
OUT
ADJ
SPX2810
V
IN
10F
1k
1%
330
1%
+
4.7F
5V
ADJ
IN
OUT
(Note A)
1k
TTL
Input
2N3904
DROPOUT (MAX)
Note A: V
IN(MIN)
= (Intended V
OUT
) + (V
)
SPX2810
V
IN
R
1
R
2
10F
10F*
1k,
330
1%
+
4.7F
C
1
*C
1
improves ripple rejection.
Z
C
should be ~ R1 at ripple frequency
5V
ADJ
IN
OUT
(Note A)
V
OUT
Note A: V
IN(MIN) = (Intended VOUT
) + (V DROPOUT (MAX))
1%
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| SPX2810U-L | 1.25 V-10 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSFM3 |
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| SQDP-016-03.75-SBL-TBL | INTERCONNECTION DEVICE |
| SQDP-016-03.75-TBL-STL | INTERCONNECTION DEVICE |
| SQDP-032-03.75-SBL-STL | INTERCONNECTION DEVICE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPX2810U | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1A Low Dropout Positive Linear Regulator |
| SPX2810U-1.5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX2810U-2.5 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1A Low Dropout Positive Linear Regulator |
| SPX2810U-3.0 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX2810U-3.3 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
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