L5973AD データシートの表示（PDF） - STMicroelectronics
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L5973AD Datasheet PDF : 21 Pages
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L5973AD
3
Electrical characteristics
Electrical characteristics
Table 4. Electrical characteristics
( TJ = 25 °C, VCC = 12 V, unless otherwise specified)
Symbol
Parameter
Test condition
Min Typ Max Unit
VCC
Operating input voltage
range
Vo = 1.235 V; Io = 2 A
4
36
V
RDS(on)
Mosfet on Resistance
0.250 0.5
Ω
Il
Maximum limiting
current
VCC = 4.4 V to 36 V
2
2.3
A
fs
Switching frequency
500
kHz
Duty cycle
0
100 %
Dynamic characteristics (see test circuit ).
V5
Voltage feedback
4.4 V < VCC < 36 V,
20 mA < IO < 2 A
1.220 1.235 1.25
V
η
Efficiency
VO = 5 V, VCC = 12 V
90
%
DC characteristics
Iqop
Iq
Iqst-by
Total operating
quiescent current
Quiescent current
Total stand-by
quiescent current
Duty cycle = 0;
VFB = 1.5 V
Vinh > 2.2 V
5
7
mA
2.7 mA
50 100 µA
Inhibit
Device ON
INH threshold voltage
Device OFF
0.8
V
2.2
V
Error amplfier
VOH
VOL
Io source
Io sink
Ib
High level output
voltage
VFB = 1 V
Low level output
voltage
VFB = 1.5 V
Source output current
VCOMP = 1.9 V;
VFB = 1 V
Sink output current
VCOMP = 1.9 V;
VFB = 1.5 V
Source bias current
DC open loop gain
RL = ∞
3.5
V
0.4
V
200 300
µA
1
1.5
mA
2.5
4
µA
50
57
dB
5/21
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