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参数资料
| 型号： | SPX29150T-2.5 |
| 元件分类： | 线性稳压 |
| 英文描述： | 1.5A High Current Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response |
| 中文描述： | 1.5A的高电流低压差稳压器可调节 |
| 文件页数： | 7/9页 |
| 文件大小： | 78K |
| 代理商： | SPX29150T-2.5 |
7
Date:5/25/04
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
Copyright 2004 Sipex Corporation
The SPX29150/51/52/53 incorporates protec-
tion against over-current faults, reversed load
insertion, over temperature operation, and
positive and negative transient voltage.
Thermal Considerations
Although the SPX29150/51/52/53 offers
limiting circuitry for overload conditions, it is
still necessary to insure that the maximum
junction temperature is not exceeded in the
application. Heat will flow through the lowest
resistance path, the junction-to-case path. In
order to insure the best thermal flow of the
component, proper mounting is required.
Consult the heatsink manufacturer for thermal
resistance and heat sink design.
TO-220 Design Example:
Assume that VIN = 10V, VOUT = 5V, IOUT =
1.5A, TA = 50°C, θHA= 1°C/W, θCH= 2°C/W,
and
θJC= 3C°/W, where:
TA = ambient temperature,
θHA= heatsink to ambient thermal
resistance
θCH= case to heatsink thermal
resistance
θJC = junction to case thermal
resistance
The power calculated under these conditions
is:
PD = (VIN – VOUT) * IOUT = 7.5W.
SPX29150
VOUT
V
IN
6.8 F
+
+ 10 F
1
2
3
SPX29152
VOUT
VIN
GND
ADJ
1
2
3
4
5
R1
R2
6.8 F
++ 10 F
Figure 19. Fixed Output Linear Regulator
Figure 20. Adjustable Output Linear Regulator
And the junction temperature is calculated as
TJ = TA + PD * (θHA + θCH + θJC) or
TJ = 50 + 7.5 * (1+2+3) = 95°C
Reliable operation is insured.
Capacitor Requirements
The output capacitor is needed to insure
stability and minimize the output noise. The
value of the capacitor varies with the load.
However, a minimum value of 10
F alumi-
num capacitor will guarantee stability over all
load conditions. A tantalum capacitor is
recommended if a faster load transient
response is needed. If the power source has a
high AC impedance, a 0.1
F ceramic capaci-
tor between input & ground is recommended.
Minimum Load Current
To ensure a proper behavior of the regulator
under light load, a minimum load of 5mA for
SPX29150/51/52/53 is required.
Typical Application Circuits
Figure 19 represents at typical fixed output
regulator. Figure 20 represents an adjustable
output regulator. The values of R1 and R2 set
the output voltage value as follows: VOUT
=VREF * [1 + (R1/R2)]. For best results, the
total series resistance should be small enough
to pass a minimum regulator load current of
5mA. A minimum value of 10k
is recom-
mended for R2 with a range between 10k
and 47k
.
APPLICATION INFORMATION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX29150T-2-5/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator |
| SPX29150T-3.3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time |
| SPX29150T-3.3/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time |
| SPX29150T-3-3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator |
| SPX29150T-3-3/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator |
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