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參數(shù)資料
| 型號： | REG104FA-2.7/500 |
| 元件分類： | 固定正電壓單路輸出LDO穩(wěn)壓器 |
| 英文描述： | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.46 V DROPOUT, PSSO5 |
| 封裝： | D2PAK-5 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 246K |
| 代理商： | REG104FA-2.7/500 |
SBVS025A
REG104
10
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
Vrms
V
N
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
Vrms 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:
V
Vrms
RR
R
Vrms
V
N
OUT
REF
=
+
=
45
2
45
12
The REG104 adjustable version does not have the noise-
reduction pin available, however, the adjust pin is the sum-
ming junction of the error amplifier. A capacitor, CFB,
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PDF描述 |
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| REG104GA-2.7G4 | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.4 V DROPOUT, PDSO6 |
| REG1117FA | ADJUSTABLE POSITIVE LDO REGULATOR, 1.55 V DROPOUT, PSSO3 |
| REG1117TR | ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PDSO4 |
| REG1118-2.85/2K5G4 | 2.85 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PDSO4 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REG104FA-3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REG104FA-3.3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REG104FA-3.3/500 | 功能描述:低壓差穩(wěn)壓器 - LDO DMOS 1A LDO Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| REG104FA-3.3/500G3 | 功能描述:低壓差穩(wěn)壓器 - LDO DMOS 1A LDO Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| REG104FA-3.3/KTTT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DMOS 1A Low-Dropout Regulator |
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