L9777C datasheet(22/25 Pages) STMICROELECTRONICS

22 / 25 page

Electrical and thermal characteristics

L9777

22/25

Doc ID 13496 Rev 2

VDD (option C)

VDD,VCC

DIFFVR

Output voltage difference

between VDD and VCC

IVDD = 1 to 50 mA

VI = 6.6 to 31 V

-25

VDD

ILIM2

VDD output limitation

current

VI = 6.6 to 31 V

100

240

VI,VDD

VDP2

Dropout voltage

IVDD = 50 mA; VI = 6.6 to 31 V

1.5

VDD

VLINE2

VDD Line regulation

voltage

VI = 6.6 to 31 V

IVDD = 1 to 50 mA

VDD

VLOAD2

VDD Load regulation

voltage

IVDD = 1 to 50 mA

VI = 6.6 to 31 V

VDD

VDDUN

VDD undervoltage

threshold

VI = 6.6 to 31 V

VCC-

400

VCC-

300

VCC-

200

VDD

TFVDD

VDD spike dependent

undervoltage filter time

VDD transition from 5 V to 4 V

µs

VWDTHH

Input high voltage

0.3

VCC

VWDTHL

Input low voltage

0.7

VCC

VWDHY

WD input hysteresis

250

500

800

RWD

Pull down resistor

DIWDC

Charge current

VD = 0.1 V; VI = 13.5 V

102040

μA

DIWDD

Discharge current

VD = 2.5 V; VI = 13.5 V

102040

μA

DVDTHL

Low threshold

0.52

0.62

0.72

DVDTHH

High threshold

1.14

1.24

1.34

DTWOP

Watchdog period

CD =10 nF

DTWOL

Watchdog output low

time

CD =10 nF

WD_EN

VWENTL

WD_EN input low

voltage

0.30

VCC

WD_EN

VWENTH

WD_EN input high

voltage

0.70

VCC

---

WD_EN

VWENHY

WD_EN input hysteresis

200

500

800

WD_EN

IWD_EN

Pull up current Option A

2.5

μA

WD_EN

IWD_EN

Pull down current

Option B and C

μA

Table 4.

Electrical and thermal characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

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