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L7980A bảng dữ liệu(PDF) 14 Page - STMicroelectronics

tên linh kiện L7980A
Giải thích chi tiết về linh kiện  2 A step-down switching regulator
PDF  44 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7980A bảng dữ liệu(HTML) 14 Page - STMicroelectronics

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Functional description
L7980
14/44
Doc ID 15181 Rev 4
Figure 8.
Overcurrent protection strategy
5.5
Enable function
The enable feature allows to put in stand-by mode the device.With EN pin lower than 0.3V
the device is disabled and the power consumption is reduced to less than 30 µA. With EN
pin lower than 1.2 V, the device is enabled. If the EN pin is left floating, an internal pull down
ensures that the voltage at the pin reaches the inhibit threshold and the device is disabled.
The pin is also VCC compatible.
5.6
Hysteretic thermal shutdown
The thermal shutdown block generates a signal that turns off the power stage if the junction
temperature goes above 150°C. Once the junction temperature goes back to about 130°C,
the device restarts in normal operation. The sensing element is very close to the PDMOS
area, so ensuring an accurate and fast temperature detection.



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