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参数资料
| 型号： | LP2980AIM5X-4.7 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Micropower 50 mA Ultra Low-Dropout Regulator |
| 中文描述： | 4.7 V FIXED POSITIVE LDO REGULATOR, 0.225 V DROPOUT, PDSO5 |
| 封装： | SOT-23, 5 PIN |
| 文件页数： | 15/18页 |
| 文件大小： | 423K |
| 代理商： | LP2980AIM5X-4.7 |
Typical Applications
(Continued)
brought low, the converter will be in shutdown, and will draw
less than 1 μA from the source.
Notes:
A. Drive this input with a logic signal (see Application Hints).
If the shutdown function is not to be used, tie the ON/OFF
pin directly to the V
IN
pin.
B. Capacitor is required for regulator stability. Minimum size
is shown, and may be increased without limit.
C. Increasing the output capacitance improves transient re-
sponse and increases phase margin.
D. A heatsink may be required for this transistor. The maxi-
mum allowable value for thermal resistance of the heatsink
is dependent on ambient temperature and load current (see
curves in ). Once the value is obtained from the graph, a
heatsink must be selected which has a thermal resistance
equal to or lower than this value. If the value is above
60C/W, no heatsink is required (the TO-220 package alone
will safely dissipate this).
For these curves, a maximum junction temperature of 150C
is assumed for the pass transistor. The case-to-heatsink at-
tachment thermal resistance is assumed to be 1.5C/W. All
calculations are for 5.5V input voltage (which is worst-case
for power dissipation).
DS012078-54
FIGURE 8. Heatsink Thermal Resistance Requirements
for
Figure 7
L
www.national.com
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP2980AIM5X-5.0 | 功能描述:低压差稳压器 - LDO 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 |
| LP2980AIM5X-5.0/NOPB | 功能描述:低压差稳压器 - LDO 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 |
| LP2980AITP-157 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| LP2980AITP-3.3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LP2980AITP-3.3/NOPB | 功能描述:IC REG LDO 3.3V 50MA 5USMD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.1V 输入电压:最高 5.5V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA 电流 - 限制（最小）:420mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
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