参数资料
| 型号： | SPX29152T5-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.5A TO263-5 |
| 标准包装： | 500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调至 1.25V |
| 输入电压： | 2.5 V ~ 16 V |
| 电压 - 压降（标准）： | 0.39V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A |
| 电流 - 限制（最小）： | 1.7A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 供应商设备封装： | TO-263-5 |
| 包装： | 带卷 (TR) |
APPLICATION INFORMATION
The SPX29150/51/52/53 incorporates pro-
tection against over-current faults, reversed
load insertion, over temperature operation,
and positive and negative transient volt-
ages.
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 ther-
mal 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 H = 1°C/W, θ CH = 2°C/W,
and θ JC = 3C°/W, where:
T A = ambient temperature,
θ HA = heatsink to ambient thermal resis-
tance
θ CH = case to heatsink thermal resistance
θ JC = junction to case thermal resistance
The power calculated under these condi-
tions is:
P D = (V IN – V OUT ) * I OUT = 7.5W.
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 10μF alumi-
num capacitor will guarantee stability over all
load conditions. A tantalum capacitor is rec-
ommended if a faster load transient response
is needed. If the power source has a high
AC impedance, a 0.1μF ceramic capacitor
between input & ground is recommended.
The output capacitors maximum ESR value
for stable operation is 0.33ohms.
Minimum Load Current
To ensure proper behavior of the regulator
under light loads, a minimum load of 5mA
for SPX29150/51/52/53 is required.
Typical Application Circuits
Figure 19 represents a 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)]. A minimum value of
10kΩ is recommended for R2 with a range
between 10kΩ and 47kΩ.
6.8 μ F
V IN
+
6.8μF
SPX29150
+
10μF
V OUT
V IN
+
1 SPX29152
2
3
GND
5
4
ADJ
+
R1
V OUT
10 μ F
R2
Figure 19. Fixed Output Linear Regulator
Figure 20. Adjustable Output Linear Regulator
REV B 06 / 0 5/0 8
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
7
? Copyright 2008 Exar Corporation
相关PDF资料 |
PDF描述 |
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| SPX29151T5-L-5-0/TR | IC REG LDO 5V 1.5A TO263-5 |
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| LT3060ETS8-2.5#TRPBF | IC REG LDO 2.5V .1A TSOT23-8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX29152U5 | 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 |
| SPX29152U5-L | 功能描述:低压差稳压器 - LDO 1.5A LOW DROPOUT RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SPX29153 | 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 |
| SPX29153T5 | 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 |
| SPX29153T5/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 |
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