Symbol

Parameter

Test condition

Min. Typ. Max. Unit

Pin

Isdtot_hot

Supply current in VB, UV,

OV, WAKE pin during device

shutdown at 14 V, T = 150 °C

Guaranteed by design

-

-

55

μA

VB, UV,

OV,

WAKE

Isdtot

Supply current in VB, UV,

OV, WAKE pin during device

shutdown at 12 V, T = 25 °C

Guaranteed by design

-

-

30

μA

VB, UV,

OV,

WAKE

VB_Slope_fast

maximum rise slew rate of VB

line

Device OFF

-

-

1

V/μs

VB

VB_Slope_fast_ON

Device ON, driver OFF,

VB > 8 V

-

-

5

V/μs

VB

Device ON, driver ON.

-

-

0.2

V/μs

VB

VB_Slope_slow (rising

and falling)

Minimum slew rate on VB line

0.5

-

-

V/s

VB

1. Cranking scenario. PWR_UP occurs at VB ≥ VB_min.

4.1.2

WAKE

A key pin (WAKE) acts as control input. Pulling WAKE pin below Turn_OFF threshold triggers the power down

sequence. At first, both hot swap and oring pre-driver outputs are turned OFF, by triggering the internal active

pull-down, for typically 1 ms power down_dly timing. After that, the device is turned off, with consequent reduction

of current absorption from VB pin. Pulling this pin above Turn_ON threshold allows the internal startup circuits

to turn the device again. A 1 ms filter time is applied on WAKE pin, on both rising and falling edges, in order to

prevent device from turning on and off in a wrong way, due to disturbances present on WAKE pin.

When the device is off (without VB or WAKE LOW), HGATE AND DGATE are kept in high impedance (turn OFF

guaranteed by the external passive components).

If VB rises up, starting from 0 V, and OUT is higher than STG threshold, VDS comparators could be set,

depending on the timing of starting profile.

Table 9. WAKE input parameters

Symbol

Parameter

Test condition

Min. Typ.

Max. Unit

Pin

WAKE_high_th

WAKE turn ON threshold

-

2.1

-

2.7

V

WAKE

WAKE_low_th

WAKE turn OFF threshold

-

1.4

-

2

V

WAKE

WAKE_hys

WAKE hysteresis

-

0.5

-

1

V

WAKE

WAKE_pd

WAKE leakage

WAKE < WAKE_high_th -200 mV

0.4

-

10

μA

WAKE

WAKE,ft

WAKE filter time

Guaranteed by scan

0.9

1

1.1

ms

-

Powerdown_dly

Power down delay time

Guaranteed by scan

0.9

1

1.1

ms

-

4.1.3

UV and OV detection

An external voltage divider is present on VB pin. UV and OV pins of the device are connected to this voltage

divider. UV and OV voltages are compared with a fraction of internal bandgap reference.

When the UV pin falls below its 1 V threshold, HGATE and DGATE pins are pulled down. When the UV pin rises

above 1.2 V HGATE and DGATE pins are pulled up.

When OV is above its 1.2 V threshold, both HGATE and DGATE are turned OFF. When OV falls below 1 V, both

HGATE and DGATE pins are allowed to turn on again if there are no other faults. At power-up, an OV voltage

higher than threshold blocks turn-on of the external drivers controlled by HGATE and DGATE pins.

See also Table 18 for details.

STPM801

Functional behavior in detail

DS13990 - Rev 2

page 11/38