參數(shù)資料
型號(hào)： L78M12AB
廠商： 意法半導(dǎo)體
英文描述： Precision 500mA regulators(精密500mA穩(wěn)壓器)
中文描述： 精密500mA的穩(wěn)壓器（精密500mA的穩(wěn)壓器）
文件頁(yè)數(shù)： 18/26頁(yè)
文件大小： 416K
代理商： L78M12AB
Applications information
L78M00AB/AC series
18/26
6
Applications information
6.1
Design considerations
The L78M00AB Series of fixed voltage regulators are designed with Thermal Overload
Protection that shuts down the circuit when subjected to an excessive power overload
condition, Internal Short-Circuit Protection that limits the maximum current the circuit will
pass, and Output Transistor Safe-Area Compensation that reduces the output short-circuit
as the voltage across the pass transistor is increased. In many low current applications,
compensation capacitors are not required. However, it is recommended that the regulator
input be bypassed with a capacitor if the regulator is connected to the power supply filter
with long wire lengths, or if the output load capacitance is large. An input bypass capacitor
should be selected to provide good high-frequency characteristics to insure stable operation
under all load conditions. A 0.33μF or larger tantalum, mylar, or other capacitor having low
internal impedance at high frequencies should be chosen. The bypass capacitor should be
mounted with the shortest possible leads directly across the regulators input terminals.
Normally good construction techniques should be used to minimize ground loops and lead
resistance drops since the regulator has no external sense lead.
Figure 16.
Current regulator
I
O
= V
XX
/R
1
+I
d
Figure 17.
Adjustable output regulator
V
O
= 7.0V to 20V
V
I
- V
O
≥
2.0V
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L78M12ABDT 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 12V 0.5A Positive RoHS:否 制造商:STMicroelectronics 輸出類(lèi)型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
L78M12ABDT-1 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 12V 0.5A Positive RoHS:否 制造商:STMicroelectronics 輸出類(lèi)型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
L78M12ABDT-TR 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 12V 0.5A Positive RoHS:否 制造商:STMicroelectronics 輸出類(lèi)型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
L78M12ABDT-TR-CUT TAPE 制造商:ST 功能描述:L78M12 Series 12 V 500 mA Three Terminal Positive Voltage Regulator - TO-252
L78M12ABV 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 12V 0.5A Positive RoHS:否 制造商:STMicroelectronics 輸出類(lèi)型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
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