- 您现在的位置：买卖IC网 > PDF目录299979 > TK7403232LCLEX (TOKO INC) DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 PDF资料下载
参数资料
| 型号： | TK7403232LCLEX |
| 厂商： | TOKO INC |
| 元件分类： | 固定正电压多路输出LDO稳压器 |
| 英文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封装： | SOT-23, 8 PIN |
| 文件页数： | 19/30页 |
| 文件大小： | 913K |
| 代理商： | TK7403232LCLEX |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页当前第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
TOKO@Inc.
IC Data Sheet
TK740xxL
May 2001
GC3-H010 /D
Page 26
Layout @@@
MaterialFGrass epoxy 20~20mm@t=0.8mm
Pd=U00 mW when mounted as recommended. Derate at 4.8mW/
°C for operation above 25°C. The thermal
resistance isja=208/W. The package loss is limited at the temperature that the internal temperature sensor
works (about 150). Therefore, the package loss is assumed to be an internal limitation. There is no heat
radiation characteristic of the package unit assumed because of the small size. Heat is carried away by the device
being installed on the PCB. This value changes by the material and the copper pattern etc. of the PCB. Enduring
losses of about 500mW becomes possible in a lot of applications operating at 25.
Determining the thermal resistance when mounted on
a PCB.
The operating chip junction temperature is shown by
Tj=ja~Pd+Ta.
Tj of IC is set to about 140.
Pd is a value when the over temperature sensor is made to work.
Pd is easily obtained.
Mount the IC on the PCB. Pd becomes Vin~Iin when the output side of the IC is short-circuited.
The input current decreases gradually by the temperature rise of the chip.
Please use the value when the current is steady (thermal equilibrium is reached).
In many cases, heat radiation is good, and Pd becomes 600mW or moreB
Pd is obtained by the normal temperature degrees. The current that can be used at the highest operating
temperature is obtained from the graph of the figure below.
Procedure (Do when PCB mounted).
1. Pd is obtained (Vin~Iin when the output side is short-circuited).
2. Pd is plotted on the horizontal line to 25.
3. Pd is connected with the point of 150by the straight line
(bold face line).
4. A line is extended vertically above the point of the use temperature in
the design. For instance, 75is assumed (broken line).
5. Extend the intersection of the derating curve (fat solid line) and (broken
line) to the left and read the Pd value.
6.DPd(Vinmax\Vout)=Iout (at 75)
The maximum current that can be used at the highest operating temperature is:
Iout àDPd (Vinmax \Vout).
When (Vinmax\Vout) is small, a lot of Iout is calculated. However, use that exceeds IoutMax cannot be done.
Vin
On / off
A
GND
On / off B
Vout B
1
4
5
8
Vout A
GND
Tais a=25j
150
ja~pd{25
ja~od125
jai125^pdj(^
mv )
o d(mv )
25 50
100
150
O
(75)
c Pd
Pd
2
3
4
5
25
50
100
150
O
o d(mv )
(85)
600
-
4.0mW/
Free Air
O
Mounted
The heat loss is in total of A and B.
相关PDF资料 |
PDF描述 |
|---|---|
| TK7403535LCLEX | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| TK740SIL-2626 | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| TK740SIL-2727 | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| TL12W03-L(T30) | SINGLE COLOR LED, WARM WHITE |
| TL6700AF160QJ | KEYPAD SWITCH, SPST, MOMENTARY, 0.05A, 12VDC, 2.06 N, SURFACE MOUNT-STRAIGHT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TK7408 | 制造商:Tekmos 功能描述:IC, PLCC-44 |
| TK75 | 制造商:ALTECH 制造商全称:Altech corporation 功能描述:POLYCARBONATE ENCLOSURE TK 75 |
| TK7500 | 功能描述:冲压机与冲模 FRM W/4 DIES & CASE RoHS:否 制造商:Souriau 大小: 产品:Dies 类型:Crimping 描述/功能: |
| TK75001 | 制造商:TOKO 制造商全称:TOKO, Inc 功能描述:PWM CONTROLLER |
| TK75001D | 制造商:TOKO 制造商全称:TOKO, Inc 功能描述:PWM CONTROLLER |
发布紧急采购，3分钟左右您将得到回复。