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L5973AD Datenblatt(PDF) 5 Page - STMicroelectronics

Teilenummer L5973AD
Bauteilbeschribung  2A switch step down switching regulator
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5973AD Datenblatt(HTML) 5 Page - STMicroelectronics

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Electrical characteristics
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Electrical characteristics
Table 4. Electrical characteristics
( TJ = 25°C, VCC = 12V, unless otherwise specified)
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
VCC
Operating input voltage
range
Vo = 1.235V; Io = 2A
436
V
RDS(on)
Mosfet on Resistance
0.250
0.5
Il
Maximum limiting
current
VCC = 4.4V to 36V
22.3
A
fs
Switching frequency
500
KHz
Duty cycle
0
100
%
Dynamic characteristics (see test circuit ).
V5
Voltage feedback
4.4V < VCC < 36V,
20mA < IO < 2A
1.220
1.235
1.25
V
η
Efficiency
VO = 5V, VCC = 12V
90
%
DC characteristics
Iqop
Total operating
quiescent current
57
mA
Iq
Quiescent current
Duty cycle = 0;
VFB = 1.5V
2.7
mA
Iqst-by
Total stand-by
quiescent current
Vinh > 2.2V
50
100
µA
Inhibit
INH threshold voltage
Device ON
0.8
V
Device OFF
2.2
V
Error amplfier
VOH
High level output
voltage
VFB = 1V
3.5
V
VOL
Low level output
voltage
VFB = 1.5V
0.4
V
Io source
Source output current
VCOMP = 1.9V;
VFB = 1V
200
300
µA
Io sink
Sink output current
VCOMP = 1.9V;
VFB = 1.5V
11.5
mA
Ib
Source bias current
2.5
4
µA
DC open loop gain
RL = ∞
50
57
dB


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