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L7981ATR Arkusz danych(PDF) 7 Page - STMicroelectronics

Numer części L7981ATR
Szczegółowy opis  3 A step-down switching regulator
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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L7981
Electrical characteristics
Doc ID 15182 Rev 3
7/44
VCH
High level output voltage
VFB<0.6V
3
V
VCL
Low level output voltage
VFB>0.6V
0.1
IO SOURCE Source COMP pin
VFB=0.5V, VCOMP=1V
17
mA
IO SINK
Sink COMP pin
VFB=0.7V, VCOMP=1V
25
mA
GV
Open loop voltage gain
(2)
100
dB
Synchronization function
High input voltage
2
3.3
V
Low input voltage
1
Slave sink current
VSYNCH=2.9V
0.7
0.9
mA
Master output amplitude
ISOURCE=4.5mA
2.0
V
Output pulse width
SYNCH floating
110
ns
Input pulse width
70
Protection
TSHDN
Thermal shutdown
150
°C
Hysteresis
30
1.
Specification referred to TJ from -40 to +125°C. Specification in the -40 to +125°C temperature range are
assured by design, characterization and statistical correlation.
2.
Guaranteed by design.
Table 4.
Electrical characteristics (continued)
Symbol
Parameter
Test condition
Values
Unit
Min
Typ
Max


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