参数资料
| 型号： | SPX3940AT-L-1-8 |
| 厂商： | Exar Corporation |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V 1A TO263-3 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 3.1 V ~ 16 V |
| 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-263-4，D²Pak（3 引线+接片），TO-263AA |
| 供应商设备封装： | TO-263-3 |
| 包装： | 管件 |
S P X 3 9 4 0
1 A L o w D r o p o u t V o l t a g e R e g u l a t o r
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
Input Voltage V IN ................................................... 20V 1
Storage Temperature .............................. -65°C to 150°C
OPERATING RATINGS
Input Voltage V IN .................................................... 16V
Junction Temperature Range ....................-40°C to 125°C
Packages Thermal Resistance
SOT-223 Junction to Case (at T A ) ..................... 15°C/W
SOT-223 Junction to Ambient ........................62.3°C/W
TO-263 Junction to Case (at T A ) ......................... 3°C/W
TO-263 Junction to Ambient ..........................31.4°C/W
Lead Temperature (Soldering, 5 sec) ..................... 260°C
Note 1: Maximum positive supply voltage of 20V must be
of limited duration (<100ms) and duty cycle (<1%). The
maximum continuous supply voltage is 16V.
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Ambient Temperature of T A = 25°C only; limits applying over the full
Operating Junction Temperature range are denoted by a “?”. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T A = 25°C, and are provided
for reference purposes only. Unless otherwise indicated, V IN = V IN +1V, I OUT = 10mA, C IN = 6.8μF, C OUT = 10μF, T A = 25°C.
Parameter
Min.
Typ.
Max.
Units
Conditions
1.8V version
Output Voltage -
Output Voltage -
SPX3940A (1%)
SPX3940 (2%)
1.782
1.755
1.764
1.737
1.8
1.8
1.8
1.8
1.818
1.845
1.836
1.863
V
V
?
?
I OUT =10mA
10mA≤I OUT ≤1A, 6V≤V IN ≤16V
2.5V version
Output Voltage -
Output Voltage -
SPX3940A (1%)
SPX3940 (2%)
2.475
2.437
2.450
2.412
2.5
2.5
2.5
2.5
2.525
2.563
2.550
2.588
V
V
?
?
I OUT =10mA
10mA≤I OUT ≤1A, 6V≤V IN ≤16V
3.3V version
Output Voltage -
Output Voltage -
SPX3940A (1%)
SPX3940 (2%)
3.267
3.217
3.234
3.184
3.3
3.3
3.3
3.3
3.333
3.383
3.366
3.416
V
V
?
?
I OUT =10mA
10mA≤I OUT ≤1A, 6V≤V IN ≤16V
5.0V version
Output Voltage -
Output Voltage -
SPX3940A (1%)
SPX3940 (2%)
4.950
4.875
4.900
4.825
5.0
5.0
5.0
5.0
5.050
5.125
5.100
5.175
V
V
?
?
I OUT =10mA
10mA≤I OUT ≤1A, 6V≤V IN ≤16V
All Voltage Options
Line Regulation
Load Regulation
- Output Voltage
temperature Coefficient
0.2
0.3
20
1.0
1.5
100
%
%
ppm/°C
?
I OUT =10mA, (V OUT +1V)≤V IN ≤16V
V IN = V OUT +1V,10mA≤I OUT ≤1A
Dropout Voltage 2
(except 1.8V version)
Ground Current 3
I GNDDO Ground Pin Current at
Dropout
Current Limit
Output Noise Voltage
1.5
70
280
12
18
1.2
2.2
400
260
200
550
25
mV
mV
mA
mA
mA
A
μV RMS
μV RMS
?
?
?
I OUT =100mA
I OUT =1A
I OUT =750mA, V IN = V OUT +1V
I OUT =1A
V IN = 0.1V less than specified V OUT I OUT =10mA,
V OUT = 0V 4
10Hz-100KHz, I L =100mA, C L =10μF
10Hz-100KHz, I L =100mA, C L =33μF
? 2012 Exar Corporation
2/11
Rev. 1.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX3940AT-L-1-8/TR | 功能描述:低压差稳压器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 |
| SPX3940AT-L-1-8TR | 制造商:EXAR 制造商全称:EXAR 功能描述:1A Low Dropout Voltage Regulator |
| SPX3940AT-L-2-5 | 功能描述:低压差稳压器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 |
| SPX3940AT-L-2-5/TR | 功能描述:低压差稳压器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 |
| SPX3940AT-L-3-3 | 功能描述:低压差稳压器 - LDO 1.0A LW DROPOUT VLT 1.5A PEAK OUTPT CURR 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 |
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