Datasheet

−50 −25 50 100 1250 25 75
4.35
3.90
4.20
3.95
4.30
4.15
4.05
4.00
4.25
4.10
T
J
− Junction Temperature − °C
V
UVLO
− Undervoltage Lockout Threshold − V
V
UVLO(on)
V
UVLO(off)
T
J
− Junction Temperature − °C
D
MAX
− Maximum Duty Cycle − %
−50 −25 50 100 1250 25 75
93
83
90
84
86
92
89
87
85
91
88
f
SW
= 100 kHZ
f
SW
= 500 kHZ
f
SW
= 1 MHZ
−50 −25 50 100 1250 25 75
1.10
0.90
1.04
0.92
0.96
1.08
1.02
0.98
0.94
1.06
1.00
T
J
− Junction Temperature − °C
V
UVLO
− Relative Programmable UVLO Threshold − %
V
UVLO(on)
V
UVLO(off)
T
J
− Junction Temperature − °C
I
SS
− Soft−Start Charging Current − µA
−50 −25 50 100 1250 25 75
14.0
10.0
10.5
11.0
13.5
12.5
11.5
13.0
12.0
TPS40077
SLUS714D – JANUARY 2007 – REVISED APRIL 2009 ..................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
MAXIMUM DUTY CYCLE UNDERVOLTAGE LOCKOUT
vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 9. Figure 10.
PROGRAMMABLE UVLO THRESHOLD SOFT-START CHARGING CURRENT
vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 11. Figure 12.
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