l4946b STMicroelectronics, l4946b Datasheet - Page 5

• Manufacturer Part Number: l4946b
• Description: Quad Voltage Regulator With Inhibit And Reset
• Manufacturer: STMicroelectronics

ELECTRICAL CHARACTERISTICS (continued)
Note 1:
The L4946 has ”Foldback” on its outputs during current limiting. As the output loading is increasing the current supplied by the L4946 increases
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 current stort to decrease is the maximum output current.
ON/OFF
Symbol
V
I ON/OFF
V
V
V
V
I
O4
O4
O4
q
R
Max Bat.Trans.
Rev. Voltage Trans.
Rev. Voltage .
Ripple rejection
Output Noise (design only)
Input Current
Input Threshold
Reset Output Voltage Set
Reset and LVW Output Rise
Time
LVW Output Threshold
LVW and LVW Output Fall Time
LVW Output Voltage
Reset Output Stability
St-By Quiescent Current ( I
Maximum Quiescent Current
( I
STCAP Output Voltage
S
)
Parameter
S
)
R
Ramp V
Hold V
Ramp V
T
all temps
V
Check V
V
f
I
I
f
I
I
Check output for AC noise
using A weighted filter (20-
20KHz)
Check output for AC noise
using 100kHz LP (20-100KHz)
V
V
V
V
V
R
V
R
Ramp V
switches from”1” to a ”0”
STCAP <7V;R
V
STCAP >8V;R
V
V
4V; I
meas reset variation
V
V
V
V
V
I
I
V
V
O
O1
O3
O
O1
O3
O2
O4
amb
S
S
S
S
S
S
S
S
IL
IH
S
ON/OFF
S
ON/OFF
bat
S
S
S
O
O
O
= 1KHz; 1V
= 10KHz; 1V
so that V
so that V
is set such that 1 < V
= 24V;
= 14V V
= 14V; I
= 14V; I
= -35V; t < 1ms; R
= -15V; R
= 14V; V
= 14V; V
= 14V V
= 200K to V
= 200K to V
= 275mA
= 60V. 1ms
= 100
= 90mA; I
= 75mA; I
= 90mA; I
= 75mA; I
= 100mA; V
= ”0”
= ”1”
= 14V; I
OUT4
= 25 C;
S
S
Test Condition
S
= 0V
= 0V
O4
S
at 60V for 10ms
from60 to 14V in 3-5ms;
from 14 to 60V in 3-5ms
down until LVW
= 2mA; V
, standard T
O 1,2,3
O1
IH
IL
IH
IL
O4
O4
O1,2,3
;
pp
;
;
O
O2
O4
O2
O4
I
I
= 175mA;
pp
= <0.8V;
I
= >2V;
O 4
O 4
= 1000
O
O
AC ; V
< 4.5V;
-0.15V;
O3
O
= 50mA;
= 50mA;
= 125mA
AC ; V
= 125mA
= 200K to V
= 200K to V
04
04
= 0mA
= 5V
= 100mA;
= 2mA;
= 200mA;
; V
; V
= 0mA
ON/OFF
all temps
IL
IH
S
amb
S
=14V
O
= ”0”
= ”1”
=14V
= 100
04
= 25 C;
;
;
= 0
<
O4
O4
;
;
Min.
4.85
4.75
4.85
4.75
2.75
2.75
-0.4
-10
7.0
50
50
15
0
2
0
0
Typ.
5
5
5
5
Max.
5.15
5.25
5.15
5.25
200
400
100
150
500
100
0.8
0.4
8.2
0.4
50
20
17
18
6
6
1
1
5
5
5
L4946
Unit
mV
mA
mA
dB
dB
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A
s
s
5/9