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TK11130MCL Datasheet(PDF) 10 Page - TOKO, Inc

Part # TK11130MCL
Description  VOLTAGE REGULATOR WITH ON/OFF SWITCH
Download  16 Pages
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Manufacturer  TOKO [TOKO, Inc]
Direct Link  http://www.toko.com
Logo TOKO - TOKO, Inc

TK11130MCL Datasheet(HTML) 10 Page - TOKO, Inc

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Page 10
March 1999 TOKO, Inc.
TK111xxM
ON/OFF RESPONSE WITH CONTROL
The turn-on time depends upon the value of the output
capacitor and the noise bypass capacitor. The turn-on time
will increase with the value of either capacitor. The graphs
below show the relationship between turn-on time and
load capacitance. If the value of these capacitors is reduced,
the load and line regulation will suffer and the noise voltage
will increase. If the value of these capacitors is increased,
the turn on time will increase.
external voltage higher than the input voltage is applied to
the output side.
REDUCTION OF OUTPUT NOISE
Although the architecture of the Toko regulators is designed
to minimize semiconductor noise, further reduction can be
achieved by the selection of external components. The
obvious solution is to increase the size of the output
capacitor. A more effective solution would be to add a
capacitor to the noise bypass terminal. The value of this
capacitor should be 0.1
µF or higher (higher values provide
greater noise reduction). Although stable operation is
possible without the noise bypass capacitor, this terminal
has a high impedance and care should be taken to avoid
a large circuit area on the printed circuit board when the
capacitor is not used. Please note that several parameters
are affected by the value of the capacitors and bench
testing is recommended when deviating from standard
values.
CONTROL FUNCTION
The TK111xxM has an active high control pin. The control
pin requires over 1.8 V for operation and under 0.6 V for
standby. For the range of 0.6 V < V
CONT < 1.8 V, operation
is undefined. If the control function is not used, connect the
control pin to V
IN.
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
SW
CN
VIN
OUTPUT VOLTAGE RESPONSE A
(OFF
→ON)
-5
5
25
15
35
CL = 0.47µF
45
CL = 0.68 µF
CL = 1.5 µF
CL = 1.0 µF
TIME (µs)
ILOAD = 30 mA, CN = 3300 pF
OUTPUT VOLTAGE RESPONSE B
(OFF
→ON)
02
6
48
CN = 0.47 µF
CN = 0.33 µF
CN = 0.68µF
CN = 1.0 µF
TIME (ms)
ILOAD = 30 mA, CL = 2.2 µF
CN = 0.1 µF
CONTROL FUNCTION


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