TPS53355_17 Datasheet, PDF (8/39 Pages) Texas Instruments – High-Efficiency 30-A Synchronous Buck SWIFT Converter With Eco-mode

TPS53355
SLUSAE5D – AUGUST 2011 – REVISED NOVEMBER 2016
6.6 Typical Characteristics
For V_OUT = 5 V, a 744355182 inductor is used. For 1 ≤ V_OUT ≤ 3.3 V, a PA0513.441 inductor is used.
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700
600
500
400
300
200
100
0
−40 −25 −10
V_EN = 5V
V_VDD = 12 V
V_VFB = 0.63 V
No Load
5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
Figure 1. VDD Supply Current vs. Junction Temperature
16
14
12
10
8
6
4
2
0
−40 −25 −10
V_VDD = 12 V
5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
Figure 3. TRIP Pin Current vs. Junction Temperature
1000
7
6
5
4
3
2
1
0
−40 −25 −10
V_EN = 0 V
V_VDD = 12 V
No Load
5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
Figure 2. VDD Shutdown Current vs. Junction Temperature
140
120
100
80
60
40
20
0
−40 −25 −10
5 20 35 50 65 80
Junction Temperature (°C)
OVP
UVP
95 110 125
Figure 4. OVP/UVP Trip Threshold vs. Junction Temperature
1000
100
FCCM
Skip Mode
10
1
0.01
V_IN = 12 V
V_OUT = 1.1 V
f_SW = 300 kHz
0.1
1
10
100
Output Current (A)
Figure 5. Switching Frequency vs. Output Current
100
FCCM
Skip Mode
10
1
0.01
V_IN = 12 V
V_OUT = 1.1 V
f_SW = 500 kHz
0.1
1
10
100
Output Current (A)
Figure 6. Switching Frequency vs. Output Current
8
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