L9777 datasheet(22/25 Pages) STMICROELECTRONICS

Part #	L9777

Description	High precision output voltage

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Electrical and thermal characteristics

L9777

22/25

DocID13496 Rev 4

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

-

25

mV

VDD

ILIM2

VDD output limitation

current

VI = 6.6 to 31 V

55

100

240

mA

VI,VDD

VDP2

Dropout voltage

IVDD = 50 mA; VI = 6.6 to 31 V

-

1.5

V

VDD

VLINE2

VDD Line regulation

voltage

VI = 6.6 to 31 V

IVDD = 1 to 50 mA

-

25

mV

VDD

VLOAD2

VDD Load regulation

voltage

IVDD = 1 to 50 mA

VI = 6.6 to 31 V

-

25

mV

VDD

VDDUN

VDD undervoltage

threshold

VI = 6.6 to 31 V

VCC-

400

VCC-

300

VCC-

200

mV

VDD

TFVDD

VDD spike dependent

undervoltage filter time

VDD transition from 5 V to 4 V

1

-

μs

WD

VWDTHH

Input high voltage

-

0.3

VCC

V

WD

VWDTHL

Input low voltage

-

0.7

VCC

--

V

WD

VWDHY

WD input hysteresis

-

250

500

800

mV

WD

RWD

Pull down resistor

-

15

35

80

kΩ

DIWDC

Charge current

VD = 0.1 V; VI = 13.5 V

10

20

40

μA

DIWDD

Discharge current

VD = 2.5 V; VI = 13.5 V

10

20

40

μA

DVDTHL

Low threshold

-

0.52

0.62

0.72

DVDTHH

High threshold

-

1.14

1.24

1.34

V

DTWOP

Watchdog period

CD =10 nF

20

40

80

ms

DTWOL

Watchdog output low

time

CD =10 nF

5

10

20

ms

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

mV

WD_EN

IWD_EN

Pull up current Option A

-

2.5

5

10

μA

WD_EN

IWD_EN

Pull down current

Option B and C

-

5

10

20

μA

Table 4. Electrical and thermal characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

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