R7986A datasheet(14/37 Pages) STMICROELECTRONICS

Teilenummer	R7986A

Bauteilbeschribung	3 A step-down switching regulator for aerospace applications

PDF	37 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Functional description

R7986A

14/37

DocID026997 Rev 1

Figure 7. Overcurrent protection

5.5

Enable function

The enable feature allows the device to be put into standby mode. With the EN pin is lower

than 0.3 V the device is disabled and the power consumption is reduced to less than 30

A.

With the EN pin is 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 120 °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.

R7986A Datenblatt(PDF) 14 Page - STMicroelectronics