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A7985ATR Datasheet(PDF) 34 Page - STMicroelectronics

Part # A7985ATR
Description  2 A step-down switching regulator for automotive applications
PDF  44 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A7985ATR Datasheet(HTML) 34 Page - STMicroelectronics

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Application information
A7985A
34/44
DocID023128 Rev 5
Figure 22. Junction temperature vs. output
current at VIN = 24 V
Figure 23. Junction temperature vs. output
current at VIN = 12 V
VOUT=1.8V
VOUT=3.3V
VOUT=5V
HSOP
VQFN
VIN=24V
FSW=250KHz
TAMB=25 C
VOUT=1.8V
VOUT=3.3V
VOUT=5V
HSOP
VQFN
VIN=12V
FSW=250KHz
TAMB=25 C
Figure 24. Junction temperature vs. output
current at VIN = 5 V
Figure 25. Efficiency vs. output current
at VO = 1.8 V
VOUT=1.2V
VOUT=1.8V
VOUT=3.3V
HSOP
VQFN
VIN=5V
FSW=250KHz
TAMB=25 C
40
45
50
55
60
65
70
75
80
85
0.100
0.600
1.100
1.600
2.100
Io [A]
Vin=5V
Vin=12V
Vin=24V
Vo=1.8V
FSW=250kHz
Figure 26. Efficiency vs. output current
at VO =5V
Figure 27. Efficiency vs. output current
at VO = 3.3 V
60
65
70
75
80
85
90
95
0.100
0.600
1.100
1.600
2.100
Io [A]
Vin=12V
Vin=18V
Vin=24V
Vo=5.0V
FSW=250kHz
50
55
60
65
70
75
80
85
90
95
0.100
0.600
1.100
1.600
2.100
Io [A]
Vin=5V
Vin=12V
Vin=24V
Vo=3.3V
FSW=250kHz



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