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参数资料
| 型号： | TK7403232LCLEX |
| 厂商： | TOKO INC |
| 元件分类： | 固定正电压多路输出LDO稳压器 |
| 英文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封装： | SOT-23, 8 PIN |
| 文件页数： | 3/30页 |
| 文件大小： | 913K |
| 代理商： | TK7403232LCLEX |
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TOKO@Inc.
IC Data Sheet
TK740xxL
May 2001
GC3-H010 /D
Page 11
Input /Output Capacitors
Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. The
equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. However, it is
recommended to use as large a value of capacitance as is practical. The output noise and the ripple noise decrease
as the capacitance value increases.
ESR values vary widely between ceramic and tantalum capacitors. However, tantalum capacitors are assumed
to provide more ESR damping resistance, which provides greater circuit stability. This implies that a higher
level of circuit stability can be obtained by using tantalum capacitors when compared to ceramic capacitors with
similar values.
The input capacitor is necessary when the battery is discharged, the power
supply impedance increases, or the line distance to the power supply is long.
This capacitor might be necessary on each individual IC even if two or more
regulator ICs are used. It is not possible to determine this indiscriminately.
Please confirm the stability while mounted.
The IC provides stable operation with an output side capacitor of 0.1
F (Vout1.8V). If it is 0.1F or more
over the full range of temperature, either a ceramic capacitor or tantalum capacitor can be used without
considering ESR. It is not possible to say indiscriminately. Please confirm stability while mounted.
Please increase the output capacitor value when the load current is 5mA or less. The stability of the regulator improves if a big output
side capacitor is used (the stable operation area extends.)
Bias Voltage and Temperature Characteristics of Ceramic Capacitor
Generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. Please consider both characteristics
when selecting the part. The B curves are the recommend characteristics.
For evaluation@@
KYOCERA@CM05B104K10ABACM05B224K10ABACM105B104K16AACM105B224K16AACM21B225K10A
MURATA @@GRM36B104K10AGRM42B104K10@GRM39B104K25AGRM39B224K10AGRM39B105K6.3
The recommended valueFCin=CL=0.1
F(MLCC) Iout0.5mA.
Cin
≥0.1F
Vout
CL
≥0.1F
0.01
0.1
1
10
100
0
50
100 150
Iout [mA]
ESR
[
]
Vout=5.0
StableArea
CL=0.1 uF
Vout=3.0V
0.01
0.1
1
10
100
0
50
100 150
Iout [mA]
ESR
[
]
StableArea
CL=0.1 uF
Vout=2.0V
0.01
0.1
1
10
100
0
50
100 150
Iout [mA]
ESR
[
]
StableArea
CL=0.1 uF
150
Vout=1.5V
-
0.01
0.1
1
10
100
0
50
100
ESR
[
]
Iout [mA]
All S table
CL1.0F
StableArea
CL=0.1uF
150
0.01
0.1
1
10
100
0
50 100
Iout [mA]
ESR
[]
Vout=4.
StableArea
CL=0.1 uF
Stable operation area vs. voltage, current, and ESR
%
Capacitance vs. Voltage
0
Bias voltageiVj
CAP
2
4
6
8
10
50
60
70
80
90
100
B Curve
F Curve
Capacitance vs. Temperature
%
60
50
80
90
100
70
CAP
-50 -25
0
25
50
75 100
Ta()
B Curve
F Curve
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