Datasheet

L5970D Electrical characteristics
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3 Electrical characteristics
Table 4. Electrical characteristics
( T
J
= 25°C, V
CC
= 12V, unless otherwise specified)
Symbol Parameter Test condition Min Typ Max Unit
V
CC
Operating input
voltage range
V
o
= 1.235V; I
o
= 2A
(1)
4.4 36 V
R
DS(on)
Mosfet on
Resistance
(1)
0.250 0.5 Ω
I
l
Maximum limiting
current
V
CC
= 4.4V to 36V
1.5 1.87 2.25 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
4.4V < V
CC
< 36V,
20mA < I
O
< 2A
1.220 1.235 1.25 V
(1)
1.198 1.235 1.272 V
h Efficiency
V
O
= 5V, V
CC
= 12V
90 %
DC characteristics
I
qop
Total operating
quiescent current
(1)
35mA
I
q
Quiescent current
Duty cycle = 0;
V
FB
= 1.5V
2.5 mA
I
qst-by
Total stand-by
quiescent current
V
inh
> 2.2V
(1)
50 100 µA
V
CC
= 36V;
V
inh
> 2.2V
(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
V
FB
= 1V
3.5 V
V
OL
Low level output
voltage
V
FB
= 1.5V
0.4 V
I
o source
Source output
current
V
COMP
= 1.9V;
V
FB
= 1V
200 300 µA