TK11330BMCL TOKO, TK11330BMCL Datasheet - Page 24

• Manufacturer Part Number: TK11330BMCL
• Description: VOLTAGE REGULATOR WITH ON/OFF SWITCH
• Manufacturer: TOKO

13-1. Stability
Linear regulators require input and output capacitors in
order to maintain the regulator's loop stability. If a 0.1 F
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.
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.
A recommended value of the application is as follows.
However, above recommended value does not satisfy
some conditions.
See “Output Voltage, Output Current vs. Stable
Operation Area“ on the next page.
Select the CL capacitance according to the condition of
use.
If the fast load transient response is necessary, increase
the CL capacitance as much as possible.
13. APPLICATIONS INFORMATION
Cin 0.22 F
Cin=CL 0.22 F at Iout 0.5mA
Vin
GND
TK113xxCM
Cnp
0.01 F
Vout
CL 0.22 F
GC3-I013B
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
TK113xxCM
Page 24