Datasheet

Functional description L5973AD
12/22 Doc ID 9552 Rev 9
Figure 7. Driving circuitry
4.7 Inhibit function
The inhibit feature allows to put in stand-by mode the device. With INH pin higher than 2.2 V
the device is disabled and the power consumption is reduced to less than 100 μA. With INH
pin lower than 0.8 V, the device is enabled. If the INH pin is left floating, an internal pull up
ensures that the voltage at the pin reaches the inhibit threshold and the device is disabled.
The pin is also Vcc compatible.
4.8 Thermal shutdown
The shutdown block generates a signal that turns off the power stage if the temperature of
the chip goes higher than a fixed internal threshold (150 °C). The sensing element of the
chip is very close to the PDMOS area, so ensuring an accurate and fast temperature
detection. An hysteresis of approximately 20 °C avoids that the devices turns on and off
continuously
Vgs
max
GATE
STOP
DRIVE
DRAIN
OFF
ON
PDMOS
VOUT
DRAIN
VCC
I
LOAD
C
ESR
D00IN1133
I
OFF
I
ON
ON/OFF
CONTROL
CLAMP
L