www.德州仪器.com
TYPICALCHARACTERISTICS
40
45
50
55
60
65
70
75
80
85
90
95
100
0.01 0.1 1 10 100 1000
V
O
= 3.3 v,
l = 4.7
µ
h,
C
O
= 10
µ
F
V
I
= 3.7 v
V
I
= 5 v
efficency - %
I
L
- 加载 电流 - 毫安
40
45
50
55
60
65
70
75
80
85
90
95
100
0.01 0.1 1 10 100 1000
V
O
= 1.8 v,
l = 4.7
µ
h,
C
O
= 22
µ
F
V
I
= 2.7 v
V
I
= 5 v
efficency - %
I
L
- 加载 电流 - 毫安
V
I
= 3.7 v
tps62220,tps62221,tps62222
tps62223,tps62224
tps62228,tps62229
SLVS491C–SEPTEMBER2003–REVISEDSEPTEMBER2004
TableofGraphs
图示
figure1,
vsloadcurrentfigure2,
η
效率
Figure3
vsInputvoltageFigure4
I
Q
NoloadquiescentcurrentvsInputvoltageFigure5
f
s
SwitchingfrequencyvsTemperatureFigure6
V
o
OutputvoltagevsOutputcurrentFigure7
r
ds(在)
-p-channelswitch,vsinputvoltagefigure8
r
ds(在)
r
ds(在)
-n-channelrectifierswitchvsinputvoltagefigure9
LoadtransientresponseFigure10
PWMmodeoperationFigure11
电源-savemodeoperationfigure12
开始-upfigure13
EFFICIENCYEFFICIENCY
vsvs
LOADCURRENTLOADCURRENT
figure1.figure2.
6