www.德州仪器.com
ELECTRICALCHARACTERISTICS
TPS65020
SLVS607–SEPTEMBER2005
vindcdc1=vindcdc2=vindcdc3=vcc=vinldo=3.6v,vbackup=3v,t
一个
=–40
°
Cto85
°
c,typicalvaluesare
atT
一个
=25
°
c(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
vdcdc2step-downconverter
V
I
inputvoltagerange,vindcdc22.56v
I
O
Maximumoutputcurrent1000mA
I
(sd)
shutdownsupplycurrentinvindcdc2dcdc2_en=gnd0.11
µ
一个
r
ds(在)
p-channelmosfeton-resistancevindcdc2=v
(gs)
=3.6v140300m
Ω
I
lkg
p-channelleakagecurrentvindcdc2=6v2
µ
一个
r
ds(在)
n-channelmosfeton-resistancevindcdc2=v
(gs)
=3.6v150297m
Ω
I
lkg
n-channelleakagecurrentv
(ds)
=6V710
µ
一个
I
LIMF
forwardcurrentlimit(p-andn-频道)2.5v<vindcdc2<6v1.401.551.70a
f
S
oscillatorfrequency1.31.51.7mhz
vindcdc2=2.5vto6v;
1.8v–2%2%
0mA
≤
I
O
≤
1.0a
Fixedoutputvoltage
FPWMDCDC2=0
vindcdc2=2.8vto6v;
2.5v–2%2%
0mA
≤
I
O
≤
1A
vindcdc2=2.5vto6v;
1.8v–2%2%
0mA
≤
I
O
≤
1A
Fixedoutputvoltage
FPWMDCDC2=1
vindcdc2=2.8vto6v;
2.5v–1%1%
0mA
≤
I
O
≤
1A
adjustableoutputvoltagewithresistordiv-vindcdc2=vdcdc2+0.3v(min2.5v)
–2%2%
ideratdefdcdc2fpwmdcdc2=0to6v;0ma
≤
I
O
≤
1.0a
adjustableoutputvoltagewithresistordiv-vindcdc2=vdcdc2+0.3v(min2.5v)
–1%1%
ideratdefdcdc2;fpwmdcdc2=1to6v;0ma
≤
I
O
≤
1.0a
vindcdc2=vdcdc2+0.3v(最小值.2.5v)
lineregulation0%/v
to6v;i
O
=10mA
LoadRegulationI
O
=10mato1ma0.25%/一个
VDCDC2rampingfrom5%to95%oftarget
Softstartramptime750
µ
s
值
InternalresistancefromL2toGND1M
Ω
VDCDC2dischargeresistance300
Ω
7
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