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參數(shù)資料
| 型號： | REG1117FA-5 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| 中文描述： | 三端固定電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 382K |
| 代理商： | REG1117FA-5 |
REG1117, REG1117A
SBVS001B
6
www.ti.com
LINE TRANSIENT RESPONSE
60
40
20
0
–
20
–
40
5.25
4.25
3.25
I
O
D
0
20
40
60
80
100
120
140
160
180
200
Time (μs)
C
IN
= 1μF
C
OUT
= 10μF Tantalum
I
OUT
= 0.1A
At T
J
= +25
°
C, all models, unless otherwise specified.
TYPICAL CHARACTERISTICS
(Cont.)
FIGURE 2. Adjustable-Voltage Model—Basic Connections.
0.1
O
D
0
60
40
Time (
μ
s)
20
LOAD TRANSIENT RESPONSE
100
80
0
–
0.1
0.5
0
–
0.5
L
C
IN
= 10
μ
F
C
= 10
μ
F
Tantalum
V
= 4.25V
Preload = 0.1A
APPLICATIONS INFORMATION
Figure 1 shows the basic hookup diagram for fixed-voltage
models. All models require an output capacitor for proper
operation and to improve high frequency load regulation. A
10
μ
F tantalum capacitor is recommended. Aluminum elec-
trolytic types of 50
μ
F or greater can also be used. A high
quality capacitor should be used to assure that the ESR
(Effective Series Resistance) is less than 0.5
.
Figure 2 shows a hookup diagram for the adjustable voltage
model. Resistor values are shown for some commonly used
output voltages. Values for other voltages can be calculated
from the equation shown in Figure 2. For best load regula-
tion, connect R
1
close to the output pin and R
2
close to the
ground side of the load as shown.
FIGURE 1. Fixed-Voltage Model—Basic Connections.
V
OUT
(V)
1.25
1.5
2.1
2.85
3
3.3
5
10
R
1
(
)
(2)
Open
750
158
169
137
115
113
113
R
2
(
)
(2)
Short
147
107
215
191
187
340
787
REG1117
V
O
V
IN
10μF
Tantalum
10μF
Tantalum
+
+
REG1117
(Adj)
V
IN
V
O
C
10μF
C
1
10μF
C
3(1)
10μF
+
+
+
R
1
R
2
Load
3
2
1
NOTE: (1) C
3
optional. Improves high-frequency line rejection. (2) Resistors are standard 1% values.
V
O
= R
(1.25V) + (50μA) (R
2
)
1
1
+ R
2
This term is negligible with
proper choice of values
—
see
table at right.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REG1117FA5.0 | 制造商:BB 制造商全稱:BB 功能描述:800mA and 1A Low Dropout Positive Regulator 1.8V, 2.5V, 2.85, 3.3V, 5V, and Adjustable |
| REG1117FA-5.0 | 制造商:Texas Instruments 功能描述: |
| REG1117FA-5.0/2K5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:VOLT REGULATOR|FIXED|+5V|BIPOLAR|SIP|3PIN|PLASTIC |
| REG1117FA-5.0/500 | 功能描述:低壓差穩(wěn)壓器 - LDO 800mA & 1A LDO 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(fù)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 |
| REG1117FA5.0/500G3 | 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output LDO 1.0A Fixed Int Crnt Lim 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(fù)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 |
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