參數(shù)資料
型號: TK63022BCB-G
廠商: TOKO INC
元件分類: 固定正電壓單路輸出LDO穩(wěn)壓器
英文描述: 2.2 V FIXED POSITIVE LDO REGULATOR, 0.262 V DROPOUT, PBGA4
封裝: FC-4
文件頁數(shù): 19/29頁
文件大?。?/td> 525K
代理商: TK63022BCB-G
TK630xxB
GC3-J013
Page 26
12-3. On/Off Control
It is recommended to turn the regulator Off when the
circuit following the regulator is not operating. A design
with little electric power loss can be implemented. We
recommend the use of the On/Off control of the regulator
without using a high side switch to provide an output
from the regulator. A highly accurate output voltage with
low voltage drop is obtained.
Because the control current is small, it is possible to
control it directly by CMOS logic.
Fig12-7: The use of On/Off control
REG
Vsat
On/Off Cont.
Control Terminal Voltage ((V
Cont)
On/Off State
V
Cont > 1.3V
On
V
Cont < 0.25V
Off
Parallel Connected On/Off Control
Fig12-8: The example of parallel connected IC
TK63042B
TK63033B
TK63015B
4.2V
3.3V
1.5V
On/Off
Cont.
V
In
V
Out
The above figure is multiple regulators being controlled
by a single On/Off control signal. There is concern of
overheating, because the power loss of the low voltage
side IC (TK63015B) is large. The series resistor (R) is put
in the input line of the low output voltage regulator in
order to prevent over-dissipation. The voltage dropped
across the resistor reduces the large input-to-output
voltage
across
the
regulator,
reducing
the
power
dissipation in the device. When the thermal sensor works,
a decrease of the output voltage, oscillation, etc. may be
observed.
12-4. Influence by Light
When this IC is exposed to strong light, the electrical
characteristics change. Please confirm the influence by
light in your design.
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