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L4979D-E датащи(PDF) 5 Page - STMicroelectronics

номер детали L4979D-E
подробное описание детали  Automotive low dropout voltage regulator
PDF  22 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4979D-E датащи(HTML) 5 Page - STMicroelectronics

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DS3717 Rev 12
5/22
L4979D-E, L4979MD
Block diagram and pin descriptions
21
1
Block diagram and pin descriptions
Figure 1. Block diagram
Table 2. Pin function
SO8
pin number
SO20
pin number
Pin name
Function
1
1
En
Enable input If high, regulator, watchdog and reset are
operating. If low, regulator, watchdog and reset are shut
down.
2
4
gnd
Ground reference
5,6,15,16
gnd
Ground. These pins are to be connected to a heat
spreader electrically grounded
3
7
Res
Reset output. It is pulled down when output voltage
drops below Vo_th or frequency at Wi is too low.
4
10
Vcr
Reset timing adjust a capacitor between Vcr pin and
gnd sets the reset delay time (trd)
5
11
Vcw
Watchdog timer adjust a capacitor between Vcw pin and
gnd sets the time response of the watchdog monitor.
6
14
Wi
Watchdog input. If the frequency at this input pin is too
low, the Reset output is activated.
7
17
Vo
Voltage regulator output output capacitor >100 nF is
needed for regulator stability
Voltage reference
reset
watchdog
Vs
Vi
Wi
Vcw
Vcr
Ctr
Ctw
Res
En
gnd
Vo
Co
5V, 150 mA
Voltage reference
reset
watchdog
Vs
Vi
Wi
Vcw
Vcr
Ctr
Ctw
Res
En
gnd
Vo
Co
5V, 150 mA
GAPGCFT00200



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