L7983 datasheet(22/43 Pages) STMICROELECTRONICS

Part #	L7983

Description	60 V, 300 mA synchronous step-down switching regulator with 10 μA quiescent current

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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5.6.2

Overvoltage protection (OVP)

In case the VOUT(FB) pin is detected above the VOVP threshold, the output overvoltage protection is triggered.

When this occurs, the RST pin is forced low and the L7983 actively discharges the output voltage by sinking

current (refer to Section 5.6.1 Overcurrent protection (OCP)).

Figure 21. Overvoltage protection

VOVP

VOVP-HYST

VOUT

RST

ILX

INEG

As soon as the OVP cause is removed, the proper switching activity is restored and RST output is released, with

the delay and threshold described in Section 5.4 .

5.6.3

Overtemperature protection (OTP)

If the device junction temperature increases above TSHDWN (165 °C typ.) the switching activity is inhibited until a

temperature drop of THYS (30 °C typ.) is detected.

When the switching activity is resumed, a soft-start is implemented. The OTP protection is always active.

L7983

Fault management

DS13354 - Rev 1

page 22/43

L7983 Datasheet(PDF) 22 Page - STMicroelectronics