L4989MD datasheet(6/19 Pages) STMICROELECTRONICS

Part #	L4989MD

Description	Low power voltage regulator

Download	19 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

6 / 19 page

Obsolete

Product(s)

- Obsolete

Product(s)

Block diagram and pin configuration

L4989

6/19

Figure 2.

Pins configuration

Table 2.

Pins description

name

SO-8(D)

S0-20(MD)

Function

WEn

1

Watchdog Enable input

If high watchdog functionality is active

Gnd

2

4

Ground reference

Gnd

5, 6, 15, 16

Ground.

Connected these pins to a heat spreader ground

Res

3

7

Reset output.

It is pulled down when output voltage goes below Vo_th

or frequency at Wi is too low.

Vcr

4

10

Reset timing adjust.

A capacitor between Vcr pin and gnd, sets the reset

delay time (trd)

Vcw

5

11

Watchdog timer adjust

A capacitor between Vcw pin and gnd, sets the time

response of the watchdog monitor.

Wi

6

14

Watchdog input.

If the frequency at this input pin is too low, the Reset

output is activated.

Vo

7

17

Voltage regulator output

Block to ground with a capacitor >100nF (needed for

regulator stability)

Vs

8

20

Supply voltage

Block to ground directly at IC pin with a capacitor

N.C.

2, 3, 8, 9, 12,

13, 18, 19

Not connected

WEn

GND

Res

Vcr

1

2

3

4

5

6

7

8

Vs

Vo

Wi

Vcw

WEn

N.C.

GND

Res

N.C.

Vcr

10

9

8

7

6

5

4

3

2

1

20

N.C.

Vo

GND

Wi

N.C.

Vcw

11

12

13

14

15

16

17

18

19

Vs

SO-8

SO-20

Similar Part No. - L4989MD

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	L4989MD	1Mb / 22P	for car body applications

More results

Similar Description - L4989MD

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	L4989	584Kb / 10P	LOW POWER VOLTAGE REGULATOR
STMicroelectronics	L9777B	481Kb / 25P	Low power voltage regulator
ON Semiconductor	LP2950	193Kb / 22P	Low Power Low Dropout Voltage Regulator January, 2018 ??Rev. 30
Sharp Corporation	PQ15RW21	20Kb / 2P	Low Power-Loss Voltage Regulator
	PQ1R30	18Kb / 2P	Low Power-Loss Voltage Regulator
	PQ1S30	23Kb / 3P	Low Power-Loss Voltage Regulator
	PQ033ES1MXP	39Kb / 3P	Low Power-Loss Voltage Regulator
	PQ5RS1A	18Kb / 1P	Low Power-Loss Voltage Regulator
	PQ035ES1MXP	37Kb / 3P	Low Power-Loss Voltage Regulator
	PQ07VR5MAZ	50Kb / 3P	Low Power-loss Voltage Regulator

More results

L4989MD Datasheet(PDF) 6 Page - STMicroelectronics

L4989MD Datasheet(HTML) 6 Page - STMicroelectronics

Similar Part No. - L4989MD

Similar Description - L4989MD

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Datasheet Download

Link URL