L5973D
ELECTRICAL CHARACTERISTICS
(T
j
= 25°C, V
CC
= 12V, unless otherwise specified.)
(*) Specification Referred to Tj from -40 to 125°C
(1)
.
Symbol
V
CC
R
DSON
I
l
f
s
Parameter
Operating input voltage range
Mosfet on Resistance
Maximum limiting current
Switching frequency
V
CC
= 4.4V to 36V
*
Test Condition
V
o
= 1.235V; I
o
= 2A
*
*
2.5
212
225
0
1.220
1.198
Min.
4.4
Typ.
0.150
3
250
250
Max.
36
0.5
3.5
280
275
100
1.25
1.272
Unit
V
Ω
A
KHz
KHz
%
V
V
%
5
2.5
*
*
50
80
100
150
0.8
2.2
3.5
0.4
200
1
50
300
1.5
2.5
R
L
=
∞
I
comp
= -0.1mA to 0.1mA
V
COMP
= 1.9V
V
CC
= 4.4V to 36V
V
CC
= 4.4V to 36V
V
sync
= 0.74V
V
sync
= 2.33V
I
source
= 3mA
no load, V
sync
= 1.65V
0.11
0.21
2.75
0.20
3.234
3.2
3
0.35
3.3
3.3
5
8
10
8
3.366
3.399
10
15
30
2.5
57
2.3
4
mA
mA
µA
µA
V
V
V
V
µA
mA
µA
dB
mS
Duty cycle
DYNAMIC CHARACTERISTICS
(see test circuit ).
V
5
Voltage feedback
4.4V < V
CC
< 36V,
20mA < I
O
< 2A
η
Efficiency
V
O
= 5V, V
CC
= 12V
DC CHARACTERISTICS
Total Operating Quiescent
I
qop
Current
Quiescent current
I
q
I
qst-by
INHIBIT
INH Threshold Voltage
ERROR AMPLIFIER
V
OH
V
OL
I
o source
I
o sink
I
b
gm
High level output voltage
Low level output voltage
Source output current
Sink output current
Source bias current
DC open loop gain
Transconductance
VFB = 1V
VFB = 1.5V
V
COMP
= 1.9V; V
FB
= 1V
V
COMP
= 1.9V; V
FB
= 1.5V
Device ON
Device OFF
Total stand-by quiescent current
*
1.235
1.235
90
*
Duty Cycle = 0; V
FB
= 1.5V
V
inh
> 2.2V
V
CC
= 36V; V
inh
> 2.2V
3
SYNC FUNCTION
High Input Voltage
Low Input Voltage
Slave Sink Current
Master Output Amplitude
Output Pulse Width
REFERENCE SECTION
Reference Voltage
V
REF
0.74
0.25
0.45
V
V
mA
mA
V
µs
V
V
mV
mV
mA
I
REF
= 0 to 5mA
V
CC
= 4.4V to 36V
Line Regulation
Load Regulation
Short Circuit Current
I
REF
= 0mA
V
CC
= 4.4V to 36V
I
REF
= 0 to 5mA
*
Notes: 1. Specification over the -40 to +125 Tj Temperature range are assured by design, characterization and statistical correlation.
2. Guaranteed by design.
3/10
STMICROELECTRONICS [ STMICROELECTRONICS ]
