Datasheet

L5973AD Electrical characteristics
Doc ID 9552 Rev 9 5/22
3 Electrical characteristics
T
J
= 25 °C, V
CC
= 12 V, unless otherwise specified
Table 4. Electrical characteristics
Symbol Parameter Test condition Min Typ Max Unit
V
CC
Operating input voltage
range
V
o
= 1.235 V; I
o
= 2 A
436V
R
DS(on)
MOSFET on
resistance
0.250 0.5 Ω
I
l
Maximum limiting
current
V
CC
= 4.4 V to 36 V
22.33.5A
f
s
Switching frequency 500 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
η
Efficiency
V
O
= 5 V, V
CC
= 12 V
90 %
DC characteristics
I
qop
Total operating
quiescent current
57mA
I
q
Quiescent current
Duty cycle = 0;
V
FB
= 1.5 V
2.7 mA
I
qst-by
Total stand-by
quiescent current
V
inh
> 2.2 V
50 100 μA
Inhibit
INH threshold voltage
Device ON 0.8 V
Device OFF 2.2 V
Error amplifier
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
I
b
Source bias current 2.5 4 μA
DC open loop gain
R
L
= ∞ 50 57 dB