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参数资料
| 型号： | SPX2810T-L/TR |
| 元件分类： | 可调正电压单路输出LDO稳压器 |
| 英文描述： | 1.25 V-10 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSSO3 |
| 封装： | LEAD FREE, TO-263AA, 3 PIN |
| 文件页数： | 10/13页 |
| 文件大小： | 106K |
| 代理商： | SPX2810T-L/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%
相关PDF资料 |
PDF描述 |
|---|---|
| SPX2810T-L | 1.25 V-10 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSSO3 |
| SPX2810T/TR | 1.25 V-10 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSSO3 |
| SPX2810U-L | 1.25 V-10 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSFM3 |
| SPX2930N-L-3.5 | 3.5 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PBCY3 |
| SQDP-016-03.75-SBL-TBL | INTERCONNECTION DEVICE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX2810U | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A Low Dropout Positive Linear Regulator |
| SPX2810U-1.5 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX2810U-2.5 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A Low Dropout Positive Linear Regulator |
| SPX2810U-3.0 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| SPX2810U-3.3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
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