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參數(shù)資料
| 型號(hào)： | L4989 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | LOW POWER VOLTAGE REGULATOR |
| 中文描述： | 低電源電壓調(diào)節(jié)器 |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 584K |
| 代理商： | L4989 |
L4989
2/10
PIN DESCRIPTION
PIN CONNECTIONS
N. (SO8)
N. (SO20)
NAME
FUNCTION
1
1
WEn
Watchdog enable input.
If high it activates the watchdog operation.
2
4
gnd
Ground reference
5,6,15,16
gnd
Ground
Connected these pins to a heat spreader ground
3
7
Res
Reset output.
It is pulled down when output voltage goes 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
Block to ground with a capacitor >100nF (needed for regulator
stability)
8
20
Vs
Supply voltage
Block to ground directly at IC pin with a ceramic capacitor
2,3,8,9,12,
13,18,19
N. C.
not connected
V
EN
GND
RES
V
CR
V
CW
W
I
V
O
V
S
1
3
2
4
6
5
7
8
D04AT515
V
EN
N.C.
N.C.
GND
GND
RES
GND
N.C.
N.C.
N.C.
N.C.
W
I
GND
GND
V
O
N.C.
N.C.
V
S
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
V
CR
W
CW
D04AT516
SO8
SO20
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PDF描述 |
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| L4989D | LOW POWER VOLTAGE REGULATOR |
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