参数资料
| 型号： | SPX1521M3-L-3-3 |
| 厂商： | Exar Corporation |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .3A SOT223-3 |
| 标准包装： | 78 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 6.5V |
| 电压 - 压降（标准）： | 0.3V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA |
| 电流 - 限制（最小）： | 330mA |
| 工作温度： | -45°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223 |
| 包装： | 管件 |
APPLICATION INFORMATION
External Capacitors
The stability of the SPX 52 requires a
2.2μF or greater capacitor between output
and ground. Oscillation could occur without
this capacitor. Most types of tantalum or
aluminum electrolytic works fine here. For
operations of below -25°C solid tantalum is
recommended since the many aluminum
types have electrolytes that freeze at about
-30°C. The ESR of about 5? or less and
resonant frequency above 500kHz are the
most important parameters in the value of
the capacitor. The capacitor value can be
increased without limit.
The SPX 52 , unlike other low dropout
regulators will remain stable and in regula-
tion with no load in addition to the internal
voltage divider. This feature is especially
important in applications like CMOS RAM
keep-alive.
Note: Tab is connected to GND
If there is more than 0 inches of wire be-
tween the input and the AC filter capacitor,
or if a battery is used as the input, then a
0. μF tantalum or aluminum electrolytic
capacitor should be placed from the input
to the ground.
Reducing Output Noise
It may be an advantage to reduce the AC
noise present at the output. One way is to re-
duce the regulator bandwidth by increasing
the size of the output capacitor. Increasing
the capacitor from μF to 220μF only de-
creases the noise from 430μV to 60μVrms
for a 00kHz bandwidth at 5V output.
PINOUTS
SOT-223 (M3)
TO-263-3 (T)
TO-220-3 (U)
TO-252 (R)
SPX1521
1 2 3
V IN GND V OUT
Top View
SPX1521
1 2 3
V OUT GND V IN
SPX1521
1 2 3
3
2
1
Front View
V IN
GND
V OUT
Top View
Thermal Resistance (Theta JA)
SOT-223 ------62.3oC/W
TO-262 ------3 .4oC/W
TO-220 ------29.4oC/W
TO-252 ------50.0oC/W
V OUT GND V IN
Front View
May 5-07
SPX 52 300mA Low Dropout Voltage Regulator
3
? 2007 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX1521M3-L-3-3/TR | 功能描述:低压差稳压器 - LDO 300mA 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 |
| SPX1521M3-L-5-0 | 功能描述:低压差稳压器 - LDO 300mA 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 |
| SPX1521M3-L-5-0/TR | 功能描述:低压差稳压器 - LDO 300mA 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 |
| SPX1521R | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:300mA Low Dropout Voltage Regulator |
| SPX1521R-2.5 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:300mA Low Dropout Voltage Regulator |
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