Datasheet

50 µs/div
500 mA/div
50 mV/div
V
I
= 5 V
V
O
= 3.3 V
Output Voltage
Load Step = 60 mA to 540 mA
Voltage at SW Pin
Inductor Current
V
I
= 5 V
I
O
= 100 mA
5 V/div
100 mA/div
5 µs/div
V
I
= 5 V
R
L
= 2.7 Ω
EN
V
O
I
I
5 V/div
100 mA/div
200 µs/div
1 V/div
10 µs/div
2 V/div 10 mV/div
V
I
= 7.2 V, V
O
= 3.3 VOutput Voltage
Voltage at SW Pin
I
O
= 20 mA
1 µs/div
2 V/div
V
I
= 7.2 V
V
O
= 3.3 V
I
O
= 800 mA
Output Voltage
Voltage at SW Pin
10 mV/div
V
I
= 4.5 V to 5.5 V to 4.5 V
1 µs/div
10 mV/div 500 mv/div
V
O
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100 1 k
I
L
− Load Current − mA
Efficiency − %
V
I
= 2.7 V
SYNC = H
V
O
= 1.8 V
T
A
= 25°C
V
I
= 5 V
V
I
= 3.3 V
V
I
= 10 V
V
I
= 7.2 V
800
810
820
830
840
850
860
870
880
890
900
−40 −20 0 20 40 60 80 100
Switching Frequency − kHz
T
A
− Free-Air Temperature − °C
2.7 V
3.6 V
7.2 V
5 V
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100 1 k
I
L
− Load Current − mA
Efficiency − %
V
I
= 3.5 V
SYNC = H
V
O
= 3.3 V
T
A
= 25°C
V
I
= 5 V
V
I
= 10 V
V
I
= 7.2 V
TPS62052, TPS62054
TPS62056, TPS62050, TPS62051
www.ti.com SLVS432E –SEPTEMBER 2002–REVISED JUNE 2011
TPS62054 TPS62056
EFFICIENCY EFFICIENCY SWITCHING FREQUENCY
vs vs vs
LOAD CURRENT LOAD CURRENT FREE-AIR TEMPERATURE
Figure 8. Figure 9. Figure 10.
OUTPUT VOLTAGE RIPPLE OUTPUT VOLTAGE RIPPLE LINE TRANSIENT RESPONSE
IN SKIP MODE IN PWM MODE IN PWM MODE
Figure 11. Figure 12. Figure 13.
V
(SWITCH)
AND I
L
(INDUCTOR CURRENT)
LOAD TRANSIENT IN SKIP MODE START-UP TIMING
Figure 14. Figure 15. Figure 16.
Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Links: TPS62052 TPS62054 TPS62056 TPS62050 TPS62051