l5973 STMicroelectronics, l5973 Datasheet - Page 5

• Manufacturer Part Number: l5973
• Description: Up To 2.5a Step Down Switching Regulator
• Manufacturer: STMicroelectronics

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