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| 型号： | SPX29302T5-L |
| 厂商： | Exar Corporation |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 3A TO263-5 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 可调至 1.25V |
| 输入电压： | 2.8 V ~ 16 V |
| 电压 - 压降（标准）： | 0.6V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3A |
| 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 |
| 其它名称： | 1016-1243-5 |
S P X 2 9 3 0 0 / 0 1 / 0 2
3 A L o w D r o p o u t V o l t a g e R e g u l a t o r
1.240
THEORY OF OPERATION
The SPX29300/01/02 incorporates protection
against over-current faults, reversed load
insertion, over temperature operation, and
positive and negative transient voltage.
T HERMAL C ONSIDERATIONS
Although the SPX29300/01/02 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 D ESIGN E XAMPLE :
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:
7.5
And the junction temperature is calculated as
or
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 high AC impedance, a 0.1 μ F
ceramic capacitor between input & ground is
recommended.
M INIMUM L OAD C URRENT
To ensure a proper behavior of the regulator
under light load, a minimum load of 5mA for
SPX29300/01/02 is required.
A DJUSTABLE R EGULATOR D ESIGN
The SPX29300/01/02 is an adjustable
regulator that can be programmed to any
value between 1.25V and 16V using 2 external
resistors, R1 and R2. The relationship between
the resistors and the output voltage is:
1
E RROR F LAG
The SPX29301 features an error flag that
indicates either an over current or under
current voltage condition. The flag output goes
low, sinking 10mA when either conditions
occurs.
E NABLE I NPUT
The SPX29301/02 has an Enable function that
switches the regulator on and off. Their
thresholds are TTL compatible. When the
regulator is active, approximately 20μA flows
through the Enable pin.
T YPICAL A PPLICATION C IRCUITS
50
7.5
1
2
3
95°
Figure 1 represents the typical implementation
for an adjustable output regulator. The values
Reliable operation
Requirements
is
insured.Capacitor
of R1 and R2 set the output voltage value as
follows:
1
C APACITOR R EQUIREMENTS
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 aluminum
A minimum value of 10kohms is recommended
for R2 with a range between 10k ? and 47k ? .
? 2010 Exar Corporation
6/10
Rev. 2.1.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX29302T5-L/TR | 功能描述:低压差稳压器 - LDO 3A LOW DROPOUT WITH ENABLE 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 |
| SPX29302U5-L | 功能描述:低压差稳压器 - LDO 3A LOW DROPOUT WITH ENABLE 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 |
| SPX29303 | 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 |
| SPX2930M1-3.0 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:150 mA Low Dropout Voltage Regulator |
| SPX2930M1-3.3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:150mA Low Dropout Voltage Regulator |
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