參數(shù)資料
型號： SPX29152U5
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time
中文描述： 1.5A的低壓差線性穩(wěn)壓器可調(diào)節(jié)
文件頁數(shù)： 7/9頁
文件大?。?/td> 78K
代理商： SPX29152U5
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 V
IN
= 10V, V
OUT
= 5V, I
OUT
=
1.5A, T
A
= 50
°
C,
θ
HA
= 1
°
C/W,
θ
CH
= 2
°
C/W,
and
θ
JC
= 3C
°
/W, where:
T
A
= ambient temperature,
θ
HA
= heatsink to ambient thermal
resistance
θ
CH
= case to heatsink thermal
resistance
θ
JC
= junction to case thermal
resistance
The power calculated under these conditions
is:
P
D
= (V
IN
– V
OUT
) * I
OUT
= 7.5W.
SPX29150
V
OUT
V
IN
6.8 F+
+
10 F
1
2
3
SPX29152
V
OUT
V
IN
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
T
J
= T
A
+ P
D
* (
θ
HA
+
θ
CH
+
θ
JC
) or
T
J
= 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
μ
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
μ
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: V
OUT
=V
REF
* [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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參數(shù)描述
SPX29152U5-L 功能描述:低壓差穩(wěn)壓器 - LDO 1.5A LOW DROPOUT RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
SPX29153 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time
SPX29153T5 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time
SPX29153T5/TR 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time
SPX29153U5 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:1.5A Low Dropout Voltage Regulator
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