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参数资料
| 型号： | TC1015 |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | 50mA, 100mA and 150mA CMOS LDOs with Shutdown and Reference Bypass |
| 中文描述： | 为50mA，100mA的电流为150mA的CMOS低压降稳压器具有关断和参考旁路 |
| 文件页数： | 7/20页 |
| 文件大小： | 558K |
| 代理商： | TC1015 |
2002 Microchip Technology Inc.
DS21335B-page 7
TC1014/TC1015/TC1185
4.0
THERMAL CONSIDERATIONS
4.1
Thermal Shutdown
Integrated
regulator off when die temperature exceeds 160°C.
The regulator remains off until the die temperature
drops to approximately 150°C.
thermal
protection
circuitry
shuts
the
4.2
Power Dissipation
The amount of power the regulator dissipates is
primarily a function of input and output voltage, and
output current. The following equation is used to
calculate worst case actual power dissipation:
EQUATION 4-1:
The maximum allowable power dissipation (Equation
4-2) is a function of the maximum ambient temperature
(T
A
MAX
), the maximum allowable die temperature
(T
J
MAX
) and the thermal resistance from junction-to-air
(
θ
JA
θ
JA
of
approximately 220°C/Watt.
EQUATION 4-2:
Equation 4-1 can be used in conjunction with Equation
4-2 to ensure regulator thermal operation is within
limits. For example:
Given:
V
IN
MAX
V
OUT
MIN
I
LOAD
MAX
= 40mA
T
J
MAX
T
A
MAX
Find: 1. Actual power dissipation
2. Maximum allowable dissipation
= 3.0V +10%
= 2.7V – 2.5%
= 125°C
= 55°C
Actual power dissipation:
P
D
≈
(V
IN
MAX
– V
OUT
MIN
)I
LOAD
MAX
= [(3.0 x 1.1) – (2.7 x .975)]40 x 10
–3
= 26.7mW
Maximum allowable power dissipation:
P
D
MAX
= (T
J
MAX
– T
A
MAX
)
θ
JA
= (125 – 55)
220
= 318mW
In this example, the TC1014 dissipates a maximum of
26.7mW; below the allowable limit of 318mW. In a
similar manner, Equation 4-1 and Equation 4-2 can be
used to calculate maximum current and/or input
voltage limits.
4.3
Layout Considerations
The primary path of heat conduction out of the package
is via the package leads. Therefore, layouts having a
ground plane, wide traces at the pads, and wide power
supply bus lines combine to lower
θ
JA
and therefore
increase the maximum allowable power dissipation
limit.
Where:
P
D
≈
(V
IN
MAX
– V
OUT
MIN
)I
LOAD
MAX
P
D
V
IN
MAX
V
OUT
MIN
I
LOAD
MAX
= Worst case actual power dissipation
= Maximum voltage on V
IN
= Minimum regulator output voltage
= Maximum output (load) current
P
D
MAX
= (T
J
MAX
– T
A
MAX
)
θ
JA
Where all terms are previously defined.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC-1015005 | 制造商:PREMO 制造商全称:PREMO CORPORATION S.L 功能描述:50/60 Hz industrial Current Transformer up to 600A |
| TC10151 | 功能描述:铝质电解电容器 - 带引线 150uF 100V RoHS:否 制造商:Kemet 引线类型: 电容:220 uF 容差:20 % 电压额定值:25 V 工作温度范围: 端接类型:Radial 外壳直径:8 mm 外壳长度:11 mm 引线间隔:5 mm 产品:General Purpose Electrolytic Capacitors 封装:Bulk |
| TC1015-1.8VCT713 | 功能描述:低压差稳压器 - LDO .1mA w/Shtdn & Ref B 1.8V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TC1015-1.8VCT713 | 制造商:Microchip Technology Inc 功能描述:V REG LDO +1.8V 1015 SOT-23A-5 |
| TC1015-1.8VCT713G | 制造商:Microchip Technology 功能描述:LDO Regulator Pos 1.8V 0.1A 5-Pin SOT-23 T/R |
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