参数资料
| 型号： | SC431CSK-.5TRT |
| 厂商： | Semtech |
| 文件页数： | 1/9页 |
| 文件大小： | 0K |
| 描述： | IC VREF SHUNT ADJ SOT-23-3 |
| 标准包装： | 1 |
| 基准类型： | 分流器，可调式 |
| 输出电压： | 2.495 V ~ 30 V |
| 容差： | ±0.5% |
| 输入电压： | 2.495 V ~ 30 V |
| 通道数： | 1 |
| 电流 - 阴极： | 130µA |
| 电流 - 输出： | 150mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 标准包装 |
| 产品目录页面： | 1359 (CN2011-ZH PDF) |
| 其它名称： | SC431CSK-.5DKR |
SC431
Adjustable Shunt Regulator
POWER MANAGEMENT
Description
The SC431 is a three terminal adjustable shunt
regulator with thermal stability guaranteed over
temperature. The output voltage can be adjusted to any
value from 2.5V (V REF ) to 30V with two external
resistors. The SC431 has a typical dynamic output
impedance of 0.25 ? . Active output circuitry provides a
very sharp turn on characteristic, making the SC431 an
excellent replacement for zener diodes.
The SC431 shunt regulator is available with four
voltage tolerances (0.5%, 1.0% and 2.0% over T A = -40 ° C
to +85 ° C and 0.5% over T A = -40 ° C to +125 ° C) and two
package options (SOT-23-3 and SO-8). This
allows the designer the opportunity to select the
optimum combination of cost and performance for their
application.
Features
Wide operating current range 130μA to 150mA
Low dynamic output impedance 0.25 ? typ.
Trimmed bandgap design + 0.5%
Alternate for TL1431, TL431, LM431 & AS431
Industrial temperature range
Available in SOT-23-3 and SO-8 packages.
Also available in Lead-free, fully WEEE and RoHS
compliant.
Applications
Linear Regulators
Adjustable Supplies
Switching Power Supplies
Battery Operated Computers
Instrumentation
Computer Disk Drives
Typical Application Circuit (1)(2)
Notes:
1) Set V OUT according to the following equation:
V OUT = V REF ? 1 +
? + I REF R 1
?
?
R1 ?
R 2 ?
2) Choose the value for R as follows:
? The maximum limit for R should be such that the
cathode current, I Z , is greater than the minimum
operating current (130μA) at V IN(MIN) .
? The minimum limit for R should be such that I Z does
not exceed 150mA under all load conditions, and the
instantaneous turn-on value for I Z does not exceed
200mA. Both of the following conditions must be met:
R min ≥
V IN (max)
200 mA
(to limit instantaneous turn-on I Z )
R min ≥
V IN (max) ? V OUT
I OUT (min) + 150 mA (to limit I Z under normal
operating conditions)
Revision: April 23, 2008
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC431CSKDA1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| SC431CSKDA2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| SC431CSKDA3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| SC431CSKDB1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| SC431CSKDB2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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