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参数资料
| 型号： | REG104GA-2.7G4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.4 V DROPOUT, PDSO6 |
| 封装： | GREEN, PLASTIC, SOT-223, 6 PIN |
| 文件页数： | 22/22页 |
| 文件大小： | 794K |
| 代理商： | REG104GA-2.7G4 |
REG104
9
SBVS025G
0
2
4
6
8
10
12
14
16
100
10
1
0.1
0.01
0.001
Enable
Current
(
A)
Enable Voltage
FIGURE 4. Enable Pin Current versus Applied Voltage.
The Enable Pin Current versus Applied Voltage relationship
is shown in Figure 4. When the Enable pin is connected to
VIN greater than 10V, a series resistor may be used to limit
the current.
FIGURE 5. Block Diagram.
FIGURE 6. Output Noise versus Noise Reduction Capacitor.
Since the value of VREF is 1.295V, this relationship reduces to:
V
N
RMS
OUT
=
35
Connecting a capacitor, CNR, from the Noise-Reduction (NR)
pin to ground can reduce the output noise voltage. Adding
CNR, as shown in Figure 5, forms a low-pass filter for the
voltage reference. For CNR = 10nF, the total noise in the
10Hz to 100kHz bandwidth is reduced by approximately
a factor of 3.5. This noise reduction effect is shown in
Figure 6.
Over Current
Over Temp
Protection
V
REF
(1.295V)
Low Noise
Charge Pump
DMOS
Output
R
1
NOTE: R
1 and R2 are internal
on fixed output versions.
V
OUT
Adj
(Adjustable
Versions)
R
2
NR
(fixed output
versions only)
Enable
REG104
V
IN
C
NR
(optional)
0.001
0.01
0.1
1
45
35
25
Output
Noise
Voltage
(
V
RMS
10Hz
-
100kHz)
C
NR (F)
C
OUT = 0
C
OUT = 10F
REG104-3.3
OUTPUT NOISE
A precision band-gap reference is used for the internal
reference voltage, VREF, for the REG104. This reference is
the dominant noise source within the REG104. It generates
approximately 45
V
RMS in the 10Hz to 100kHz bandwidth at
the reference output. The regulator control loop gains up the
reference noise, so that the noise voltage of the regulator is
approximately given by:
VV
RR
R
V
N
RMS
OUT
REF
=
+
=
45
2
45
12
The REG104 adjustable version does not have the noise-
reduction pin available, however, the adjust pin is the
summing junction of the error amplifier. A capacitor, CFB,
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PDF描述 |
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| REG1118-2.85/2K5G4 | 2.85 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PDSO4 |
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| REG1118-2.85/2K5 | 2.85 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PDSO4 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| REG104GA-3 | 功能描述:低压差稳压器 - LDO DMOS 1A LDO Reg 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 |
| REG104GA-3.3 | 功能描述:低压差稳压器 - LDO DMOS 1A LDO Reg 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 |
| REG104GA-3.3 | 制造商:Texas Instruments 功能描述:LINEAR VOLTAGE REGULATOR IC |
| REG104GA-3.3/2K5 | 功能描述:低压差稳压器 - LDO DMOS 1A LDO Reg 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 |
| REG104GA-3.3/2K5G4 | 功能描述:低压差稳压器 - LDO DMOS 1A LDO Reg 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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