STG detection is present on VOUT pin with a filter time STG.flt. When short is detected, the FLT pin is asserted

low, while MOSFET driving signals HGATE/DGATE depend on the presence of other fault events at the same

time.

During device power-up, with VOUT externally shorted, blanking time STG_blank is active, STG comparator is

masked and has no impact on FLT pin. However, external MOSFET are protected by overcurrent protection

features.

Table 11. Over current and short to GND parameters

Symbol

Parameter

Test condition

Min Typ Max Unit

Note

OC_HV_th

Overcurrent threshold (VSENSE -

VOUT), VOUT > STG threshold

-

50

55 62.5 mV SENSE, OUT

OC_LV_th

Overcurrent threshold (VSENSE -

VOUT), VOUT < STG threshold

-

19

25

32

mV SENSE, OUT

OC_HV_fast_th

Overcurrent threshold (VSENSE -

VOUT), VOUT > STG threshold

-

90 100 110

mV SENSE, OUT

OC_LV_fast_th

Overcurrent threshold (VSENSE-

VOUT), VOUT< STG threshold

-

38

50

62

mV SENSE, OUT

OC_HV_flt

Overcurrent filter time

STG = 0, guaranteed by

scan

80

-

100

μs

-

OC_LV_flt

Overcurrent filter time

STG = 1, guaranteed by

scan

80

-

100

μs

-

OC_HV_fast_flt Overcurrent filter time

STG = 0, guaranteed by

scan and design

1

-

2.2

μs

-

OC_LV_fast_flt Overcurrent filter time

STG = 1, guaranteed by

scan and design

1

-

2.2

μs

-

STG_th

OUT short to ground threshold

-

2.5 3.2

3.9

V

OUT

STG_flt

Short to ground filter time

Guaranteed by scan

-

-

10

μs

-

STG_blank

Blanking time from driver turning on

command

Guaranteed by scan

80

-

100

ms

-

4.1.5

ENOUT

ENOUT is an open-drain output, going in high impedance when the voltage at the OUT pin is above (VB -

VFULL_ON), indicating that the external MOSFETs are fully on. ENOUT pin cannot be asserted if WAKE pin

voltage is below turn off threshold.

Table 12. ENOUT parameters

Symbol

Parameter

Test condition

Min Typ Max Unit

Note

ENOUT_OD_LL

ENOUT_OD low level

Pull-up current = 1 mA

-

-

0.4

V

ENOUT

ENOUT_Leakage ENOUT_OD leakage

Apply 5 V to FLT, output buffer off

-

-

10

μA

ENOUT

VFULL_ON

VB-VOUT difference for releasing

ENOUT

-

0.5 0.8

1.1

V

-

FULL_ON_flt

Filter time to activate ENOUT

Guaranteed by scan

-

-

100

μs

-

STPM801

Functional behavior in detail

DS13990 - Rev 2

page 15/38