参数资料
型号: L7981ATR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: SWITCHING REGULATOR, DSO8
封装: 3 X 3 MM, 1.08 MM HEIGHT, ROHS COMPLIANT, HSOP-8
文件页数: 6/44页
文件大小: 1315K
代理商: L7981ATR
Functional description
L7981
14/44
Doc ID 15182 Rev 3
Figure 8.
Over current protection strategy
5.5
Enable function
The enable feature allows to put in stand-by mode the device.With EN pin lower than 0.3 V
the device is disabled and the power consumption is reduced to less than 30 A. 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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