Datasheet

Electrical characteristics B5973D
6/44 DocID14117 Rev 4
3 Electrical characteristics
Table 4. Electrical characteristics
(T
J
= -40 °C to 125 °C, V
CC
= 12 V, unless otherwise specified)
Symbol Parameter Test condition Min. Typ. Max. Unit
V
CC
Operating input
voltage range
V
0
= 1.235 V; I
0
= 2 A 4 36 V
R
DS(on)
MOSFET on
resistance
0.250 0.5 
I
L
Maximum limiting
current
(1)
V
CC
= 5 V 2.25 3 3.5
A
V
CC
= 5 V, T
J
= 25 °C 2.5 3 3.5
f
SW
Switching frequency 212 250 280 kHz
Duty cycle 0 100 %
Dynamic characteristics
V
5
Voltage feedback
4.4 V < V
CC
< 36 V,
20 mA < I
0
< 2 A
1.198 1.235 1.272 V
h Efficiency V
0
= 5 V, V
CC
= 12 V 90 %
DC characteristics
I
qop
Total operating
quiescent current
35mA
I
q
Quiescent current Duty cycle = 0; V
FB
= 1.5 V 2.5 mA
I
qst-by
Total standby
quiescent current
V
inh
> 2.2 V 50 100 A
V
CC
= 36 V;
V
inh
> 2.2 V
80 150 A
Inhibit
INH threshold voltage
Device ON 0.8 V
Device OFF 2.2 V
Error amplifier
V
OH
High level output
voltage
V
FB
= 1 V 3.5 V
V
OL
Low level output
voltage
V
FB
= 1.5 V 0.4 V
Io source
Source output
current
V
COMP
= 1.9 V; V
FB
= 1 V
190 300 A
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 A
DC open loop gain R
L =  50 65 dB