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參數(shù)資料
| 型號： | TC-1188 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | MAX8863/64 Pin Compatible, Low Dropout, 120 mA Linear Regulators |
| 中文描述： | MAX8863/64引腳兼容，低壓差，120毫安線性穩(wěn)壓器 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大小： | 226K |
| 代理商： | TC-1188 |
TC1188/TC1189
DS21364B-page 8
2002 Microchip Technology Inc.
EXAMPLE 3-1:
The previously defined power dissipation equations
can be used to ensure that the regulator thermal
operation is within limits.
Given:
V
IN(MAX)
= 3.0V +10%
V
OUT(MAX)
= 2.7V - 2.5%
I
LOAD(MAX)
= 40
M
A
T
J(MAX)
= 125°C
T
A(MAX)
= 55°C
Find:
1.
2.
Actual power dissipation.
Maximum allowable dissipation.
Actual power dissipation:
Maximum allowable power dissipation:
In this example, the TC1188/TC1189 dissipates a max-
imum of 26.7 mW below the allowable limit of 318 mW.
In a similar manner, the power dissipation equation, as
a function of V
IN
, V
OUT
and I
LOAD,
along with the power
dissipation equation, as a function of maximum junction
temperature, maximum ambient temperature and junc-
tion to air thermal resistance, can be used to calculate
maximum current and/or maximum input voltage limits.
4.0
APPLICATIONS INFORMATION
4.1
Input Capacitor
A 1 μF (or larger) capacitor is recommended to bypass
the LDO input and lower input impedance for circuit
stability when operating from batteries or high imped-
ance sources. The input capacitor can be ceramic, tan-
talum or aluminum electrolytic. For applications that
require low noise and input power supply rejection, low
effective series resistance (ESR) ceramic capacitors
are recommended over higher ESR electrolytic capac-
itors. Larger value input capacitors can be used to
improve circuit performance.
4.2
Output Capacitor
A 1 μF (minimum) capacitor is required from V
OUT
to
ground to ensure circuit stability. The output capacitor
should have an ESR greater than 0.1 ohms and less
than 2 ohm. Tantalum or aluminum electrolytic capaci-
tors are recommended. Since many aluminum electro-
lytic capacitors freeze at approximately -30°C, solid
tantalums are recommended for applications operating
below 25°C.
P
D
= V
IN(MAX)
- V
OUT(MIN)
x I
LOAD(MAX)
P
D
= ((3.0 * 1.1) - (2.7 * 0.975)) * 40 mA
D
= 26.7 mWatts
P
D
= (T
J(MAX)
- T
A(MAX)
)/
θ
JA
P
D(MAX)
= (125 - 55) / 220
P
D(MAX)
= 318 mWatts.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC1188_13 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:MAX8863/64 Pin Compatible, Low Dropout, 120 mA Linear Regulators |
| TC1188QECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.80V 100mA MAX8863/ 64 Pin Comp LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1188RECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.80V 100mA MAX8863/ 64 Pin Comp LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1188SECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.84V 100mA MAX8863/ 64 Pin Comp LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TC1188TECTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 3.15V 100mA MAX8863/ 64 Pin COMP LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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