L9301 datasheet(11/51 Pages) STMICROELECTRONICS

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L9301

Supply pins

4.1

VDD

An external +5.0 ±0.25 VDC supply provided from an external source is the primary power

source to the L9301. This supply is used as the power source for all of its internal logic

circuitry and other miscellaneous functions.

The VDD is monitored for under and over voltage and a dedicated SPI flag of each event is

set to report those conditions. The device behavior in case of VDD fault detection can be

defined using the proper configuration bit that allows to choose if the OUT must be disabled

or not.

4.2

This input is the supply for the on board charge pump and it shall be connected to protected

battery line. In case of high-side configuration, to get the specified Ron value this pin must

be connected to the same VB where the loads are connected. If it is present an additional

voltage drop between the two VB, the Rdson of that given output will be higher than the

specified maximum.

The VB is monitored for under and over voltage and a dedicated SPI flag of each event is

set to report those conditions. The device behavior in case of VB fault detection can be

defined using the proper configuration bit that allows to choose if the OUT must be disabled

or not.

Table 8. VDD

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VDD

VDD_UV

VDD undervoltage

detection threshold

VDD decreasing

4.5

4.7

VDD_uv_filt

VDD undervoltage filter

time for output disable

Tested by scan

145

μs

VDD_OV

VDD overvoltage

detection threshold

VDD increasing

5.25

5.5

VDD_ov_filt

VDD overvoltage filter

time for output disable

Tested by scan

145

μs

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