Datasheet

PERFORMANCE GRAPHS
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0 0.5 1 1.5
2
2.5 3
I -OutputCurrent- A
O
OutputRegulation-%
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0 0.5 1 1.5
2
2.5 3
V -InputVoltage-V
I
OutputRegulation-%
I = 0 A
O
I =1 A
O
I =2 A
O
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3
I -OutputCurrent- A
O
Efficiency-%
V =15V
I
V =12V
I
V =18V
I
V =19.8V
I
V =10.8V
I
t-Time=200 μs/Div
I A/Div
OUT
=500m
V
OUT
=50mV/Div(ACCoupled)
PH=5V/Div
V =100mV/Div(ACCoupled)
IN
t -Time-1 s/Divm
PH=5V/Div
V =20mV/Div(ACCoupled)
OUT
t -Time-1 s/Divm
t-Time=5ms/Div
V =2V/Div
OUT
V =10V/Div
IN
t-Time=5ms/Div
V =2V/Div
OUT
ENA =2V/Div
TPS5420-Q1
SLVS752B – NOVEMBER 2007 – REVISED JUNE 2008 ................................................................................................................................................... www.ti.com
The performance graphs (Figure 14 through Figure 20 ) are applicable to the circuit in Figure 11 , T
A
= 25 ° C
(unless otherwise specified)
Figure 14. Efficiency Figure 15. Output Regulation Figure 16. Input Regulation
vs Output Current vs Output Current vs Input Voltage
Figure 17. Input Voltage Ripple Figure 18. Output Voltage Ripple Figure 19. Transient Response,
and PH Node, I
O
= 3 A and PH Node, I
O
= 3 A I
O
Step 0.5 to 1.5 A
Figure 20. Startup Waveform, Figure 21. Startup Waveform,
V
IN
and V
OUT
ENA and V
OUT
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