A7985ATR datasheet(16/44 Pages) STMICROELECTRONICS

Part #	A7985ATR

Description	2 A step-down switching regulator for automotive applications

PDF	44 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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16 / 44 page

Functional description

A7985A

16/44

DocID023128 Rev 5

Figure 8. Overcurrent protection

5.5

Enable function

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

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

A.

With the 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 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.

A7985ATR Datasheet(PDF) 16 Page - STMicroelectronics