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L99PM72PXP bảng dữ liệu(PDF) 14 Page - STMicroelectronics

tên linh kiện L99PM72PXP
Giải thích chi tiết về linh kiện  Advanced power management system IC with embedded LIN and high speed CAN transceiver supporting CAN Partial Networking
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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L99PM72PXP bảng dữ liệu(HTML) 14 Page - STMicroelectronics

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L99PM72PXP
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Doc ID 023553 Rev 3
2.1.3
Increased output current capability for voltage regulator V2
For applications, which require high output currents, the output current capability of the
regulator can be increased my means of the integrated operational amplifiers and an
external pass transistor.
Figure 3.
Voltage source with external PNP
Figure 4.
Voltage source with external PNP and current limitation
Figure 3 shows a possible configuration with a PNP pass element using Voltage Regulator 2
to provide the voltage reference for the regulated output voltage V3.
The VS operating range for this circuit is 5.5 V to 18 V. It is important respect the input
common mode range specified for the operational amplifiers.
The output voltage V3 can be calculated using the following formula (for R3 = R4):
V
3
V
2
2
-------
R
1
R
2
+
R
2
--------------------- V

=



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