Input Voltage (V)
VIN Operating Current Switching (mA)
0 20 40 60 80 100
2.5
2.75
3
3.25
3.5
3.75
4
40°C
25°C 125°C
Input Voltage (V)
VIN Operating Quiescent Current (mA)
0 20 40 60 80 100
0
0.1
0.2
0.3
0.4
0.5
0.6
VCC = 8V
Input Voltage (V)
VIN Standby Quiescent Current (mA)
0 20 40 60 80 100
1.4
1.6
1.8
2
2.2
40°C
25°C 125°C
Input Voltage (V)
VIN Operating Quiescent Current (mA)
0 20 40 60 80 100
1.4
1.6
1.8
2
2.2
40°C
25°C 125°C
Junction Temperature (°C)
Min On-Time, Min Off-Time (ns)
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
20
40
60
80
100
120
140
160
T
OFF(min)
T
ON(min)
Input Voltage (V)
VIN Shutdown Quiescent Current (PA)
0 20 40 60 80 100
0
10
20
30
40
40°C
25°C 125°C
12
LM5145
ZHCSGB0 –JUNE 2017
www.ti.com.cn
Copyright © 2017, Texas Instruments Incorporated
Typical Characteristics (continued)
V
VIN
= 48 V, R
RT
= 25 kΩ, SYNCIN tied to VCC, EN/UVLO tied to VIN (unless otherwise noted).
Figure 7. T
ON(min)
and T
OFF(min)
vs Junction Temperature
V
SW
= 0 V V
EN/UVLO
= 0 V
Figure 8. I
Q-SHD
vs Input Voltage
V
SW
= 0 V V
EN/UVLO
= 1 V
Figure 9. I
Q-STANDBY
vs Input Voltage
V
SW
= 0 V V
EN/UVLO
= V
VIN
V
SS/TRK
= 0 V
Figure 10. I
Q-OPERATING
(Nonswitching) vs Input Voltage
V
SW
= 0 V HO, LO Open
Figure 11. I
Q-OPERATING
(Switching) vs Input Voltage
V
SW
= 0 V V
VCC
= V
BST
= V
ILIM
V
FB
= 0 V
Figure 12. VIN Quiescent Current With External VCC Applied
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