Datasheet

0.750
0.755
0.760
0.765
0.770
0.775
0.780
-50 0 50 100 150
T - Junction Temperature - C
J
o
V - Vfb Voltage - V
FBTH
V = 1.05 V
O
V (10 mV/div)
O
SW (5 V/div)
t - Time - 400 ns
V = 1.5 V
O
V = 1.8 V
O
V = 3.3 V
O
V = 2.5 V
O
V = 1.05 V
O
V = 5 V
O
400
450
500
550
600
650
700
750
800
850
900
fsw - Switching Frequency - kHz
0 5 10 15 20
V - Input Voltage - V
I
V = 1.2 V
O
400
450
500
550
600
650
700
750
800
850
900
fsw - Switching Frequency - kHz
0 0.5 1 1.5 2
I - Output Current - A
O
V = 3.3 V
O
V = 1.8 V
O
V = 1.05 V
O
V = 3.3 V
O
V = 1.8 V
O
V = 2.5 V
O
40
50
60
70
80
90
100
Efficiency - %
0 0.5 1 1.5 2
I - Output Current - A
O
t - Time - 1 ms
EN (10 V/div)
VREG5 (5 V/div)
Vout (0.5 V/div)
TPS54227
SLVSAU2B –MAY 2011–REVISED JUNE 2013 www.ti.com
TYPICAL CHARACTERISTICS (continued)
VIN = 12 V, T
A
= 25°C (unless otherwise noted)
spacer
Figure 7. START-UP WAVE FORM Figure 8. EFFICIENCY vs OUTPUT CURRENT
Figure 9. SWITCHING FREQUENCY vs INPUT VOLTAGE Figure 10. SWITCHING FREQUENCY vs
OUTPUT CURRENT
Figure 11. Vfb VOLTAGE vs JUNCTION TEMPERATURE Figure 12. VOLTAGE RIPPLE AT OUTPUT (I
O
= 2 A)
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Product Folder Links: TPS54227