Datasheet

0
2
4
6
8
10
12
14
16
200 400 600 800 1000 1200 1400 1600
Switching Frequency (kHz)
Minimum Duty Cycle (%)
Sourcing Current
Sinking Current
No Load
G001
40
50
60
70
80
90
100
0 1 2 3 4 5 6
Load Current (A)
Efficiency (%)
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
V
IN
= 12 V
V
OUT
= 1.2 V
G002
40
50
60
70
80
90
100
0 1 2 3 4 5 6
Load Current (A)
Efficiency (%)
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
V
IN
= 5 V
V
OUT
= 1.2 V
G002
40
50
60
70
80
90
100
0 1 2 3 4 5 6
Load Current (A)
Efficiency (%)
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
V
IN
= 14 V
V
OUT
= 1.2 V
G002
0
200
400
600
800
1000
1200
1400
1600
25 50 75 100 125 150 175 200 225 250
Timing Resistance (kΩ)
Switching Frequency (kHz)
G005
78
79
80
81
82
83
84
85
86
87
88
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
PGOOD Lower Threshold (%)
With Respect to VSEN
G006
TPS53313
SLUSAS8 –DECEMBER 2011 www.ti.com
TYPICAL CHARACTERISTICS
Figure 1. Ensured Minimum Duty Ratio Figure 2. Efficiency, V
IN
= 12 V
Figure 3. Efficiency, V
IN
= 5 V Figure 4. Efficiency, V
IN
= 14 V
Figure 5. Switching Frequency vs. Timing Resistance (R
T
) Figure 6. PGOOD Lower Threshold vs. Junction
Temperature
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