Datasheet

L5973D Electrical characteristics
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3 Electrical characteristics
Table 4. Electrical characteristics
( T
J
= 25 °C, V
CC
= 12 V, unless otherwise specified)
Symbol Parameter Test condition Min Typ Max Unit
V
CC
Operating input
voltage range
V
o
= 1.235 V; I
o
= 2 A
(1)
436V
R
DS(on)
Mosfet on
Resistance
(1)
0.250 0.5 Ω
I
l
Maximum limiting
current
V
CC
= 4.4 V to 36 V 2.5 3 3.5 A
f
s
Switching frequency
(1)
212 250 280 kHz
225 250 275 kHz
Duty cycle 0 100 %
Dynamic characteristics (see test circuit ).
V
5
Voltage feedback
4.4 V < V
CC
< 36 V,
20 mA < I
O
< 2 A
1.220 1.235 1.25 V
(1)
1.198 1.235 1.272 V
h Efficiency V
O
= 5 V, V
CC
= 12 V 90 %
DC characteristics
I
qop
Total operating
quiescent current
(1)
35mA
I
q
Quiescent current
Duty Cycle = 0;
V
FB
= 1.5 V
2.5 mA
I
qst-by
Total stand-by
quiescent current
V
inh
> 2.2 V
(1)
50 100 µA
V
CC
= 36 V;
V
inh
> 2.2 V
(1)
80 150 µA
Inhibit
INH threshold
voltage
Device ON 0.8 V
Device OFF 2.2 V
Error amplfier
V
OH
High level output
voltage
VFB = 1 V 3.5 V
V
OL
Low level output
voltage
VFB = 1.5 V 0.4 V
I
o source
Source output
current
V
COMP
= 1.9 V;
V
FB
= 1 V
200 300 µA
I
o sink
Sink output current
V
COMP
= 1.9 V;
V
FB
= 1.5 V
11.5 mA