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參數(shù)資料
| 型號(hào)： | TPS76918DBV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS |
| 中文描述： | 超低功耗100毫安低壓降線性穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大小： | 235K |
| 代理商： | TPS76918DBV |
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TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS
SLVS203D – JUNE 1999 – REVISED APRIL 2000
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
power dissipation and junction temperature
Specified regulator operation is assured to a junction temperature of 125
°
C; the maximum junction temperature
should be restricted to 125
°
C under normal operating conditions. This restriction limits the power dissipation
the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits,
calculate the maximum allowable dissipation, P
D(max)
, and the actual dissipation, P
D
, which must be less than
or equal to P
D(max)
.
The maximum-power-dissipation limit is determined using the following equation:
PD(max)
TJmax
TA
RJA
Where:
T
J
max
is the maximum allowable junction temperature
R
θ
JA
is the thermal resistance junction-to-ambient for the package, i.e., 285
°
C/W for the 5-terminal
SOT23.
T
A
is the ambient temperature.
The regulator dissipation is calculated using:
PD
VI
VO
IO
Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the
thermal protection circuit.
regulator protection
The TPS769xx PMOS-pass transistor has a built-in back diode that conducts reverse current when the input
voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the
input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might
be appropriate.
The TPS769xx features internal current limiting and thermal protection. During normal operation, the TPS769xx
limits output current to approximately 350 mA. When current limiting engages, the output voltage scales back
linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure,
care should be taken not to exceed the power dissipation ratings of the package. If the temperature of the device
exceeds approximately 165
°
C, thermal-protection circuitry shuts it down. Once the device has cooled down to
below approximately 140
°
C, regulator operation resumes.
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| TPS76925DBV | ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS |
| TPS76928DBV | ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS |
| TPS76933DBV | ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS |
| TPS76950DBV | ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS |
| TPS77028DBV | ULTRA LOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS76918DBVR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.8V 100mA 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(dòng)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 |
| TPS76918DBVR | 制造商:Texas Instruments 功能描述:LEADED PROCESS COMPATIBLE ((NW)) 制造商:Texas Instruments 功能描述:IC, LDO VOLT REG, 1.8V, 0.1A, 5-SOT-23 |
| TPS76918DBVRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Ultra Low-Power 100-mA 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(dòng)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 |
| TPS76918DBVT | 功能描述:低壓差穩(wěn)壓器 - LDO 1.8V 100mA 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(dòng)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 |
| TPS76918DBVTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Ultra Low-Power 100-mA 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(dòng)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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