Datasheet

Electrical characteristics L5987
6/41 Doc ID 14972 Rev 3
4 Electrical characteristics
T
J
= 25 °C, V
CC
= 12 V, unless otherwise specified.
Table 4. Electrical characteristics
Symbol Parameter Test condition
Values
Unit
Min Typ Max
V
CC
Operating input voltage
range
(1)
2.9 18
V
V
CCON
Turn on V
CC
threshold
(1)
2.9
V
CCHYS
V
CC
UVLO hysteresis
(1)
0.175 0.3
R
DS(on)
MOSFET on resistance
140 170
mΩ
(1)
140 220
I
LIM
Maximum limiting current 3.5 4.0 4.4 A
Oscillator
F
SW
Switching frequency
225 250 275
kHz
(1)
220 265
V
FSW
FSW pin voltage 1.262 V
D Duty cycle 0 100 %
F
ADJ
Adjustable switching
frequency
R
FSW
= 33 kΩ 1000 kHz
Dynamic characteristics
V
FB
Feedback voltage 2.9 V < V
CC
< 18 V
(1)
0.593 0.6 0.607 V
DC characteristics
I
Q
Quiescent current
Duty Cycle = 0,
V
FB
= 0.8 V
2.4 mA
I
QST-BY
Total stand-by quiescent
current
20 30 μA
Inhibit
INH threshold voltage
Device ON level 0.6
V
Device OFF level 1.9
INH current INH = 0 7.5 10 μA
Soft-start
T
SS
Soft-start duration
FSW pin floating 7.4 8.2 9.1
ms
F
SW
= 1 MHz,
R
FSW
= 33 kΩ
2