Datasheet

Electrical characteristics L7986TA
6/43 Doc ID 022098 Rev 3
4 Electrical characteristics
T
J
=-40 °C to 125 °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
4.5 38
V
V
CCON
Tur n - on V
CC
threshold 4.5
V
CCHYS
V
CC
UVLO hysteresis 0.1 0.4
R
DSON
MOSFET on resistance 200 400 mΩ
I
LIM
Maximum limiting current
T
J
=25 °C 3.7 4.2 4.7
A
3.5 4.7
Oscillator
F
SW
Switching frequency 210 250 275 KHz
V
FSW
FSW pin voltage 1.254 V
DDuty Cycle 0 100%
F
ADJ
Adjustable switching
frequency
R
FSW
=33 kΩ 1000 KHz
Dynamic characteristics
V
FB
Feedback voltage 4.5 V<V
CC
<38 V 0.582 0.6 0.618 V
DC characteristics
I
Q
Quiescent current
Duty Cycle=0, V
FB
=0.8
V
2.4 mA
I
QST-BY
Total standby quiescent
current
20 30 μA
Enable
V
EN
EN threshold voltage
Device OFF level 0.3
V
Device ON level 1.2
I
EN
EN current EN=V
CC
7.5 10 μA
Soft-start
T
SS
Soft-start duration
FSW pin floating 7.4 8.2 9.7
ms
F
SW
=1 MHz,
R
FSW
=33 kΩ
2