TK11250C Toko America, TK11250C Datasheet - Page 7

• Manufacturer Part Number: TK11250C
• Description: (TK112xxC) LDO Regulator
• Manufacturer: Toko America

100
0.01
100
0.1
90
80
70
60
50
10
TOKO Inc.
Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. If a 0.1 F
The equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. However, it is
The above graphs show stable operation with a ceramic capacitor of 0.1uF (excluding the low current region). If the
capacitance is not increased in the low voltage, low current area, stable operation may not be achieved. Please select
the best output capacitor according to the voltage and current used. The stability of the regulator improves if a big
output side capacitor is used (the stable operation area extends.) Please use as large a capacitance as is practical.
Although operation above 150 mA has not been described, stability is equal to or better than operation at 150 mA.
capacitor is connected to the output side, the IC provides stable operation at any voltage in the practical current
region. However, increase the CL capacitance when using the IC in the low current region and low voltage.
Otherwise, the IC oscillates.
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.
1
The input capacitor is necessary when the battery is discharged, the power
This capacitor might be necessary on each individual IC even if two or more regulator ICs are used. It is not
supply impedance increases, or the line distance to the power supply is long.
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 (Vout
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.
4.0
CL 2.2 F All Stable
The recommended value : Cin=CL=0.22 F(MLCC) Iout
For evaluation
%
0
Vout=1.5V
Iout [mA]
CL=0.1 F
Stable Area
50
Capacitance vs. Voltage
2
F Curve
Bias voltage(V)
100
4
150
6
0.01
100
0.1
B Curve
8
10
Kyocera
Murata
1
2.0
CL 1.0 F All Stable
Output voltage, Output current vs. Stable Operation Area
Vout=1.8V , 2.2V
CL=0.068 F
10
Iout [mA]
Stable Area
50
:CM05B104K10AB , CM05B224K10AB , CM105B104K16A , CM105B224K16A , CM21B225K10A
:GRM36B104K10 , GRM42B104K10 , GRM39B104K25 , GRM39B224K10 , GRM39B105K6.3
100
100
90
80
60
70
50
150
-50 -25
%
Input /Output Capacitors
IC Data Sheet
Capacitance vs. Temperature
0.01
100
0.1
10
GC3-H026 A
1
0.5
CL 0.68 F All Stable
F Curve
Vout=2.5V, 3.0V
CL=0.068 F
Iout [mA]
Stable Area
0
50
Ta( C)
25
100
2.5V). If it is 0.1 F or more over the full range of
50
150
B Curve
0.5mA.
75
0.01
100
0.1
10
1
CL 0.33 F All Stable
0.5
100
CL=0.068 F
Iout [mA]
Vout=4.0V
Stable Area
50
Cin=0.22 F
Generally, a ceramic capacitor has
both a temperature characteristic and
a
consider both characteristics when
selecting the part. The B curves are
the recommend characteristics.
100
0.1 F
voltage
150
TK112xxC
100
0.01
0.1
characteristic.
10
1
CL 0.33 F All Stable
0.5
Page 7
CL=0.068 F
Iout [mA]
Stable Area
Vout=5.0V
50
Vout
CL=0.22 F
100
0.1 F
Please
150