L9777 datasheet(20/25 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

20/25

DocID13496 Rev 4

NMI

VCCUN

VCC under voltage

threshold

RADJ = 0 V

4.5V

0.94

VCC

0.96

VCC

-

RADJ

VRADJTH

Threshold for VCC under

voltage detection

-

1.15

1.20

1.25

V

RADJ

VRJMUXTH

Threshold for RADJ

multiplexer comparator

-

0.52

0.62

0.72

V

D

VDU

NMI timing high

threshold

-

1.14

1.24

1.34

V

D

VDRL

NMI timing low threshold -

0.52

0.62

0.72

V

DIRC

Charge current

VI = 13.5 V

VD = 0.1 V

10

20

40

μA

DIRD

Discharge current

VI = 13.5 V

VD = 2.5 V

10

20

40

μA

NMI

TRR1

NMI spike dependent

filter time in case of

internal reset threshold

VCC > 2 V

RADJ = 0 V

1-

-

μA

NMI

TRRADJ

NMI fixed filter time in

case of external reset

threshold

External resistor

divider on RADJ

(see Figure 11). VCC > 2 V

1

2.5

5

μs

NMI

TRD

NMI power up delay

VI =13.5 V, CD=10 nF

45

80

115

ms

NMI

INMIL

NMI limitation current

-

5

-

25

mA

RESET (option A & B)

RESET

VRESL

Reset output low voltage Rext = 5 kΩ to VCC, VCC > 1 V

-

0.4

V

RESET

IRESETLK

RESET output leakage

current

--

-

1

μA

RESET

IRESL

RESET limitation current -

5

25

mA

RESET

TRESDF

RESET delay from NMI

falling edge

CTIMING = 2.2 nF

350

550

750

μs

RESET

TRESDR

RESET delay from NMI

rising edge

--

-

1

μs

RESET

RRESET

Pull up internal

resistance

-12

25

50

kΩ

VDD_LOW (option C)

VDD_LOW VVDD_LOWL Reset output low voltage Rext = 5 kΩ to VCC, VCC > 1 V

-

0.4

V

VDD_LOW IVDD_LOWLK

RESET output leakage

current

--

-

1

μA

VDD_LOW IVDD_LOWL RESET limitation current -

5

-

25

mA

VDD_LOW RVDD_LOW

Pull up internal

resistance

-12

25

50

kΩ

Table 4. Electrical and thermal characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

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