参数资料
| 型号： | SPX2941T5-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1A 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： | 3 V ~ 16 V |
| 电压 - 压降（标准）： | 0.28V @ 1A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1A |
| 电流 - 限制（最小）： | 1.5A |
| 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： | 带卷 (TR) |
| 其它名称： | SPX2941T5-L/TR-ND |
APPLICATION INFORMATION
The SPX294 incorporates protec-
tion against over-current faults, re-
versed load insertion, over temper-
ature operation, and positive and
negative transient voltage.
Thermal Considerations
Although the SPX294 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 re -
sistance path, the junction-to-case
path. The tab of the device is elec-
trically connected to GND. In order
to insure the best thermal flow of
the component, proper mounting is
required. Consult heatsink manu-
facturer for thermal resistance and
design of heatsink.
Power dissipation is calculated as fol-
lows:
PD = (V IN -V OUT )?( I OUT )
Maximum Junction Temperature range:
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 0.1μF ce -
ramic capacitor between input &
ground is recommended.
Minimum Load Current
To ensure a proper behavior of the
regulator under light load, a mini-
mum load of mA for SPX294 is
required.
Typical Application Circuit
Figure 19 shows a typical applica -
tions circuit for an adjustable output
regulator. The values of R and R2
set the output voltage value as fol-
lows:
V OUT = V REF ? [ + (R /R2)].
A minimum value of 10kΩ is rec -
ommended for R2 with a range be-
tween 10kΩ to 47kΩ.
10μF
TJ = T A ( MAX ) + PD? θ JA (thermal resis-
tance, junction-to-ambient)
Maximum junction temperature must
not exceed 2 °C.
V IN
6.8μF
+
EN
4 SPX2941
2
3 1
GND
5
ADJ
R1
+
V OUT
Capacitor Requirements
The output capacitor is needed to
insure stability and minimize the
output noise. The value of the ca-
pacitor varies with the load. How-
ever, a minimum value of 10μF
R2
Figure 19. Adjustable Output
Linear Regulator
Date: Sept 28-06 Rev E
SPX294 A Low Dropout Linear Regulator
? 2006 Sipex Corporation
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相关代理商/技术参数 |
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| SPX2941U5 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:1A Low Dropout Voltage Regulator, Adjustable Output, Fast Response |
| SPX2941U5-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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