參數(shù)資料
型號： L4946
廠商： 意法半導(dǎo)體
英文描述： Quad Voltage Regulator with Inhibit and Reset(帶禁止和復(fù)位的四電壓穩(wěn)壓器)
中文描述： 四電壓調(diào)節(jié)器的抑制和復(fù)位（帶禁止和復(fù)位的四電壓穩(wěn)壓器）
文件頁數(shù)： 5/9頁
文件大?。?/td> 104K
代理商： L4946
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
V
O4
Parameter
Test Condition
R
O
= 100
0
Ramp V
S
from14to 60V in 3-5ms
Hold V
S
at 60V for 10ms
Ramp V
S
from60to14V in 3-5ms;
T
amb
= 25
°
C;
all temps
V
S
= -35V; t < 1ms; R
O
= 100
0
Check V
O4
, standardT
amb
=25
°
C;
Min.
Typ.
Max.
Unit
Max Bat.Trans.
6
6
V
V
4.85
4.75
5
5
5.15
5.25
V
V
V
O4
Rev. Voltage Trans.
all temps
4.85
4.75
-0.4
50
5
5
5.15
5.25
1
V
V
V
dB
V
O4
Rev. Voltage .
Ripple rejection
V
S
= -15V; R
O
= 1000
f
O
= 1KHz;1V
pp
AC ;V
S
=14V
I
O1
= 90mA; I
O2
= 125mA
;
I
O3
= 75mA;I
O4
= 50mA;
f
O
= 10KHz;1V
pp
AC;V
S
=14V
I
O1
= 90mA; I
O2
= 125mA
;
I
O3
= 75mA;I
O4
= 50mA;
Check output for AC noise
using A weighted filter (20-
20KHz)
Check output for AC noise
using 100kHz LP (20-100KHz)
V
S
= 14V; V
IH
= >2V;
V
S
= 14V; V
IL
= <0.8V;
V
S
= 14V V
IL
V
S
= 14V V
IH
V
S
so that V
O4
< 4.5V;
R
O
= 200K
to V
04
; V
IL
= ”0”
V
S
so that V
O4
-0.15V;
R
O
= 200K
to V
04
; V
IH
= ”1”
50
dB
Output Noise (design only)
200
μ
V
400
μ
V
ON/OFF
Input Current
-10
0
2
0
1
μ
A
μ
A
V
V
V
V
I ON/OFF
Input Threshold
0.8
5
0.4
V
R
Reset Output Voltage Set
2.75
5
V
Reset and LVW Output Rise
Time
LVW Output Threshold
100
μ
s
Ramp V
S
down until LVW
switches from”1” to a ”0”
7.0
8.2
V
LVW and LVW Output Fall Time
LVW Output Voltage
150
0.4
μ
s
V
STCAP <7V;R
O
= 200K
to V
O4
;
V
IL
= ”0”
STCAP >8V;R
O
= 200K
to V
O4
;
V
IH
= ”1”
V
S
isset suchthat 1< V
04
<
4V; I
OUT4
= 2mA; V
ON/OFF
= 0
meas reset variation
V
ON/OFF
= 0V
;
I
O 4
= 100mA;
V
S
= 14V; I
O1,2,3
= 0mA
V
ON/OFF
= 0V
;
I
O 4
= 2mA;
V
bat
= 14V; I
O1,2,3
= 0mA
V
S
= 14V; I
O1
= 175mA;
I
O2
= 275mA
;
I
O3
= 200mA;
I
O4
= 100mA; V
O
= 5V
V
S
= 24V;
V
S
= 60V. 1ms
0
2.75
5
V
Reset Output Stability
50
mV
I
q
St-By Quiescent Current (
I
S
)
20
mA
500
μ
A
Maximum Quiescent Current
(
I
S
)
100
mA
STCAP Output Voltage
15
17
18
V
V
Note 1:
The L4946 has”Foldback” on its outputs during current limiting.As the output loadingis increasing the currentsupplied by the L4946increases
until a threshold is reached. When the current limiting threshold is reached, the L4946 output current will start to accrease as the loading is
continuoing to increase. The point where the output currentstort to decrease is the maximum output current.
L4946
5/9
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