参数资料
| 型号： | SPX29501T5-L-3-3 |
| 厂商： | Exar Corporation |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V 5A TO263-5 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 16V |
| 电压 - 压降（标准）： | 0.42V @ 5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 5A |
| 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： | 管件 |
APPLICATION INFORMATION
The SPX29501/02 incorporates protec tion
against over-current faults, reversed load
insertion, over temperature operation, and
posi tive and negative transient voltage.
Thermal Considerations
Although the SPX29501/02 offers limit ing
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.
TO-220 Design Example:
Assume that V IN = 8V, V OUT = 5V, I OUT = 5A, T A
= 50 ° C, θ HA = 1 ° C/W, θ CH = 2 ° C/W, and θ JC =
2 ° C/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 = 15W.
And the junction temperature is calculated as
T J = T A + P D * ( θ HA + θ CH + θ JC ) or
T J = 50 + 15 * (1+2+2) = 125 ° 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 22 μ F aluminum 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 ce-
ramic capacitor between input & ground is rec-
ommended.
Minimum Load Current
To ensure a proper behavior of the regulator
under light load, a minimum load of 10mA for
SPX29501/02 is required.
Adjustable Regulator Design
The SPX29502 is an adjustable regulator that
can be programmed to any value between 1.24V
and 16V using 2 resistors, R1 and R2. The
relationship between the resistors is:
R1 = R2(V OUT /1.24-1).
Error Flag
The SPX29501 features an error flag that
indicates either an over current or under voltage
condition. The flag output goes low, sinking
10mA when either condition occurs.
Enable Input
The SPX29501/02 have an Enable function that
switches the regulator on and off. Their thresh-
olds are TTL compatible. Enabling the regulator
requires approximately 20 μ A of current.
Typical Application Circuits
Figure 1 represents at typical fixed output regu-
lator. Figure 2 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
guarantee a minimum regulator load current of
10mA.
Rev: B Nov 2008
SPX29500/01/02/03 5A Low Dropout Voltage Regulator
5
? Copyright 200 8 Exar Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX29501T5-L-3-3/TR | 功能描述:低压差稳压器 - LDO 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 |
| SPX29501T5-L-5-0 | 功能描述:低压差稳压器 - LDO 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 |
| SPX29501T5-L-5-0/TR | 功能描述:低压差稳压器 - LDO 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 |
| SPX29501U5-1.8 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time |
| SPX29501U5-2.5 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time |
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