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0 1 2 3 4 5 6 7 8
0.94
0.96
0.98
1
1.02
1.04
1.06
1.08
−1.08
−0.72
−0.36
0
0.36
0.72
1.08
1.44
Output Voltage (V)
Power Loss, Normalized
SOA Temperature Adj (ºC)
V
IN
= 12V
V
GS
= 5V
f
SW
= 500kHz
L
OUT
= 1.0µH
I
OUT
= 15A
G001
0 400 800 1200 1600 2000 2400
0.92
0.96
1
1.04
1.08
1.12
1.16
1.2
−1.6
−0.8
0
0.8
1.6
2.39
3.19
3.99
Output Inductance (nH)
Power Loss, Normalized
SOA Temperature Adj (ºC)
V
IN
= 12V
V
GS
= 5V
V
OUT
= 3.3V
f
SW
= 500kHz
I
OUT
= 15A
G001
0 200 400 600 800 1000 1200 1400 1600
0.97
1
1.03
1.06
1.09
1.12
1.15
−0.6
0.0
0.6
1.2
1.8
2.4
3.0
Switching Frequency (kHz)
Power Loss, Normalized
SOA Temperature Adj (ºC)
V
IN
= 12V
V
GS
= 5V
V
OUT
= 3.3V
L
OUT
= 1.0µH
I
OUT
= 15A
G001
0 4 8 12 16 20 24 28
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
−3.0
−2.0
−1.0
0.0
1.0
2.0
3.0
4.0
Input Voltage (V)
Power Loss, Normalized
SOA Temperature Adj (ºC)
V
GS
= 5V
V
OUT
= 3.3V
L
OUT
=1.0µH
f
SW
= 500kHz
I
OUT
= 15A
G001
6
CSD87333Q3D
SLPS350A FEBRUARY 2014REVISED JANUARY 2017
www.ti.com
Product Folder Links: CSD87333Q3D
Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated
Typical Power Block Device Characteristics (continued)
The typical power block system characteristic curves (Figure 1 through Figure 9) are based on measurements made on a
PCB design with dimensions of 4 in (W) × 3.5 in (L) × 0.062 in (H) and 6 copper layers of 1-oz copper thickness. See
Applications for detailed explanation. T
A
= 125°C, unless stated otherwise.
Figure 6. Normalized Power Loss vs Switching Frequency Figure 7. Normalized Power Loss vs Input Voltage
Figure 8. Normalized Power Loss vs Output Voltage Figure 9. Normalized Power Loss vs Output Inductance

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