参数资料
| 型号： | SPX3819R2-L-1-8/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V .5A 8DFN |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 2.5 V ~ 16 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（3x2） |
| 包装： | 带卷 (TR) |
S P X 3 8 1 9
5 0 0 m A L o w - N o i s e L D O V o l t a g e R e g u l a t o r
Fig. 15 Output Noise vs Bypass Capacitor Value IL = 10mA,
10Hz - 100kHz
Fig. 17 Load Transient Response for 3.3V Device
APPLICATION INFORMATION
The SPX3819 requires an output capacitor for
device stability. Its value depends upon the
application circuit. In general, linear regulator
stability decreases with higher output
currents. In applications where the SPX3819 is
sourcing less current, a lower output
capacitance may be sufficient. For example, a
regulator outputting only 10mA, requires
approximately half the capacitance as the
same regulator sourcing 150mA.
Bench testing is the best method for
determining the proper type and value of the
capacitor since the high frequency
characteristics of electrolytic capacitors vary
widely, depending on type and manufacturer.
A high quality 2.2μF aluminum electrolytic
capacitor works in most application circuits,
Fig. 16 Line Transient Response for 3.3V Device
but the same stability often can be obtained
w ith a 1μF tantalum electrolytic.
With the SPX3819 adjustable version, the
minimum value of output capacitance is a
function of the output voltage. The value
decreases with higher output voltages, since
closed loop gain is increased.
T YPICAL A PPLICATIONS C IRCUITS
A 10nF capacitor on the BYP pin will
significantly reduce output noise, but it may
be left unconnected if the output noise is not a
major concern. The SPX3819 start-up speed is
inversely proportional to the size of the BYP
capacitor. Applications requiring a slow
rampup of the output voltage should use a
larger CBYP. However, if a rapid turn-on is
necessary, the BYP capacitor can be omitted.
? 2012 Exar Corporation
7/12
Rev. 2.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX3819R2-L-3-3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:500mA, Low-Noise LDO Voltage Regulator |
| SPX3819R2-L-5-0 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:500mA, Low-Noise LDO Voltage Regulator |
| SPX3819S | 制造商:Exar Corporation 功能描述:Voltage Regulator |
| SPX3819S/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:500mA, Low-Noise LDO Voltage Regulator |
| SPX3819S-1.8 | 制造商:Exar Corporation 功能描述:Voltage Regulator |
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