- 您现在的位置：买卖IC网 > PDF目录193599 > SPX29300U-5.0 3A High Current, Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time PDF资料下载
参数资料
| 型号： | SPX29300U-5.0 |
| 元件分类： | 线性稳压 |
| 英文描述： | 3A High Current, Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time |
| 中文描述： | 第3A大电流，低压差线性稳压器可调节 |
| 文件页数： | 7/11页 |
| 文件大小： | 177K |
| 代理商： | SPX29300U-5.0 |
5
Date: 5/25/04
SPX29300/01/02/03 3A Low Dropout Voltage Regulator
Copyright 2004 Sipex Corporation
The SPX29300/01/02/03 incorporates protec-
tion against over-current faults, reversed load
insertion, over temperature operation, and
positive and negative transient voltage.
Thermal Considerations
Although the SPX29300/01/02/03 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.
TO-220 Design Example:
Assume that V
IN = 10V, VOUT = 5V, IOUT =
1.5A, T
A = 50°C, θHA= 1°C/W, θCH= 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 = (VIN – VOUT) * IOUT = 7.5W.
And the junction temperature is calculated as
T
J = TA + PD * (θHA + θCH
+
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
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
SPX29300/01/02/03 is required.
Adjustable Regulator Design
The SPX29302/03 are adjustable regulators
that can be programmed to any value between
1.25V and 16V using 2 resistors, R1 and R2.
The relationship between the resistors is:
R1 = R2(Vout/1.240-1).
Error Flag
The SPX29301/03 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 SPX29301/02 have an Enable function
that switches the regulator on and off. Their
thresholds are TTL compatible. When the
regulator is active, approximately 20 uA flows
through the Enable pin.
Typical Application Circuits
Figure 1 represents at typical fixed output
regulator. Figure 2 represents an adjustable
output regulator. The values of R1 and R2 set
the output voltage value as follows:
V
OUT =VREF * [1 + (R1/R2)].
For best results, the total series resistance
should be small enough to pass a minimum
regulator load current of 5 mA. A minimum
value of 10kohms is recommended for R2
with a range between 10kohms and 47 kohms.
APPLICATION INFORMATION
相关PDF资料 |
PDF描述 |
|---|---|
| SPX2930N-3.0 | 150 mA Low Dropout Voltage Regulator |
| SPX2930N-3.3 | 150 mA Low Dropout Voltage Regulator |
| SPX2930N-3.5 | 150 mA Low Dropout Voltage Regulator |
| SPX2930N-4.0 | 150 mA Low Dropout Voltage Regulator |
| SPX2930N-4.5 | 150 mA Low Dropout Voltage Regulator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX29300U-L-3-3 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SPX29301 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:3A High Current, Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time |
| SPX29301T5-L-3-3 | 功能描述:低压差稳压器 - LDO 3A 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 |
| SPX29301T5-L-3-3/TR | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| SPX29301T5-L-5-0 | 功能描述:低压差稳压器 - LDO 3A 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 |
发布紧急采购，3分钟左右您将得到回复。