Datasheet

400 µs/div
G007
V (0.5 V/div)
OUT
EN (10 V/div)
VREG5 (5 V/div)
40
50
60
70
80
90
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Output Current (A)
Efficiency (%)
V
OUT
= 1.8 V
V
OUT
= 2.5 V
V
OUT
= 3.3 V
L = CLF7045
G008
400
450
500
550
600
650
700
750
800
850
900
0 5 10 15 20
Input Voltage (V)
Switching Frequency (kHz)
V
OUT
= 1.05 V
V
OUT
= 1.2 V
V
OUT
= 1.5 V
V
OUT
= 1.8 V
V
OUT
= 2.5 V
V
OUT
= 3.3 V
V
OUT
= 5.0 V
I
OUT
= 1 A
G009
400
450
500
550
600
650
700
750
800
850
900
0 0 1 2 2 2 3
Output Current (A)
Switching Frequency (kHz)
V
OUT
= 1.05 V
V
OUT
= 1.8 V
V
OUT
= 3.3 V
V
IN
= 12 V
G010
G012
400 ns/div
V = 1.05 V
OUT
SW (5 V/div)
V (10 mV/div)
OUT
0.750
0.755
0.760
0.765
0.770
0.775
0.780
−40 −20 0 20 40 60 80 100 120
Junction Temperature (°C)
V
FB
Voltage (V)
I
O
= 1 A
G011
TPS54329
SLVSAZ6A –SEPTEMBER 2011–REVISED MARCH 2012 www.ti.com
TYPICAL CHARACTERISTICS
V
IN
= 12 V, T
A
= 25°C (unless otherwise noted).
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
= 3 A)
10 Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS54329