參數(shù)資料
型號(hào): TK11232MBX
廠商: TOKO INC
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: VOLTAGE REGULATOR WITH ON/OFF SWITCH
中文描述: 3.25 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO6
封裝: SOT-23L, 6 PIN
文件頁(yè)數(shù): 19/21頁(yè)
文件大?。?/td> 250K
代理商: TK11232MBX
TK112xx
January, 1996 TOKO, Inc.
Page 19
1-3-96
1.) Disabling the control pin
Connect control terminal to V
IN
through a resistor (R).
Higher resistance values are good for reducing quiescent
current but this can cause the regulator to shut down at
lower input voltages. See Figure A.
+
1 μF
R
+
10 μF
V
O
V
IN
C
P
= 10 nF
1
2
3
6
5
4
Figure A
2.) Using the control function
Turn on the regulator by setting the control pin voltage to
2.4 V or higher. Turn off the regulator by pulling the control
pin below 0.6 V. The regulator can also be controlled
directly from a TTL or CMOS device. See Figure B.
+
1
μF
+
10 μF
V
O
V
IN
C
P
= 10 nF
1
3
6
2
5
4
R
Figure B
3.) Microprocessor/Logic Control
112XX
Cont
+
VO
GND
+
VIN
Microprocessor
The Input and Control current in the off mode are less than
200 pA.
APPLICATION INFORMATION
0
R
300 k
4.) Parallel connection for ON/OFF control
11250
V
IN
Cont
V
O
GND
11230
V
IN
Cont
V
O
GND
11220
V
IN
Cont
V
O
GND
+
+
+
5 V
3 V
2 V
+
+
RS
On/Off
0.1 μF
0.1 μF
V
IN
To reduce IC power dissipation, connect a resistor, R
S
, in
series with V
IN
for the lower output voltage devices. This
will prevent thermal shutdown due to excessive power
dissipation.
5.) Constant current load
112XX
Cont
+
VO
GND
+
VIN
+
R
ON/OFF
When there is a large ouput current, the quiescent current
also increases, and the difference becomes larger. When
using the ON/OFF control, the terminal voltage should be
set 2.4 V higher than the GND terminal of the IC. When the
ON/OFF control is not being used, connect it to V
IN
.
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