Datasheet

t - Time - 1 ms
EN = 10 V/div
VREG5 = 5 V/div
V = 0.5 V/div
O
40
50
60
70
80
90
100
Efficiency - %
0 0.5 1 1.5 2
I - Output Current - A
O
V = 3.3 V
O
V = 2.5 V
O
V = 1.8 V
O
400
450
500
550
600
650
700
750
800
850
900
f - Switching Frequency - kHz
sw
0 5 10 15 20
V - Input Voltage - V
I
V = 3.3 V
O
V = 1.8 V
O
V = 5 V
O
V = 1.05 V
O
V = 1.2 V
O
V = 1.5 V
O
V = 2.5 V
O
400
450
500
550
600
650
700
750
800
850
900
f - Switching Frequency - kHz
sw
0 0.5 1 1.5 2
I - Output Current - A
O
V = 3.3 V
O
V = 1.05 V
O
V = 1.8 V
O
V = 1.05 V
O
V = 50 mV/div
O
SW = 5 V/div
t - Time - 400 ns
V = 1.05 V
O
V = 10 mV/div
O
SW = 5 V/div
t - Time - 400 ns
TPS54229
SLVSAZ8A –SEPTEMBER 2011–REVISED MARCH 2012 www.ti.com
TYPICAL CHARACTERISTICS
VIN = 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. VOLTAGE RIPPLE AT OUTPUT (I
O
= 2 A) Figure 12. VOLTAGE RIPPLE AT INPUT (I
O
= 2 A)
10 Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS54229