- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299978 > TK63135SCL (TOKO INC) 3.5 V FIXED POSITIVE LDO REGULATOR, 0.42 V DROPOUT, PDSO5 PDF資料下載
參數(shù)資料
| 型號： | TK63135SCL |
| 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： | 3.5 V FIXED POSITIVE LDO REGULATOR, 0.42 V DROPOUT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 24/35頁 |
| 文件大小： | 626K |
| 代理商： | TK63135SCL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
TK631xxB/H/S
GC3-J025D
Page 30
Pd is easily calculated.
A simple way to determine Pd is to calculate V
In×IIn
when the output side is shorted. Input current gradually
falls as output voltage rises after working thermal
shutdown. You should use the value when thermal
equilibrium is reached.
Fig12-10: How to determine DPd
25
50
100
150
Pd (mW)
Pd
Ta (°C)
75
125
DPd
2
3
4
5
Procedure (When mounted on PCB.)
1. Find Pd (V
In×IIn
when the output side is short-
circuited).
2. Plot Pd against 25
°C.
3. Connect Pd to the point corresponding to the 150
°C
with a straight line.
4. In design, take a vertical line from the maximum
operating temperature (e.g., 75
°C) to the derating
curve.
5. Read off the value of Pd against the point at which the
vertical line intersects the derating curve. This is taken
as the maximum power dissipation DPd.
6. DPd
÷ (V
In,MAXVOut)=IOut (at 75°C)
The maximum output current at the highest operating
temperature will be I
Out DPd ÷ (VIn,MAXVOut).
Please use the device at low temperature with better
radiation. The lower temperature provides better quality.
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.
Fig12-11: 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
Fig12-12: The example of parallel connected IC
TK63142
TK63133
TK63115
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 (TK63115B/H/S) 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(TK631xxB)
When TK631xxB (FC-4) is exposed to strong light, the
electrical characteristics change. Please confirm the
influence by light in your design.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TK70403MTR | 1.03 V FIXED POSITIVE REGULATOR, PDSO6 |
| TK71133NTR | 3.25 V FIXED POSITIVE REGULATOR, PBCY3 |
| TK71118N | 1.75 V FIXED POSITIVE REGULATOR, PBCY3 |
| TK71118NTR | 1.75 V FIXED POSITIVE REGULATOR, PBCY3 |
| TK71118NTL | 1.75 V FIXED POSITIVE REGULATOR, PBCY3 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TK633 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low TC Precision Radial-Lead Film Resistors |
| TK633STL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:CMOS LDO REGULATOR WITH HIGH ACTIVE CONTROL ADVANCED |
| TK633V | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low TC Precision Radial-Lead Film Resistors |
| TK634 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low TC Precision Radial-Lead Film Resistors |
| TK635STL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:CMOS LDO REGULATOR WITH HIGH ACTIVE CONTROL ADVANCED |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。