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
vdcdc3step-downconverter
V
I
inputvoltagerange,vindcdc32.56v
I
O
Maximumoutputcurrent800mA
I
(sd)
shutdownsupplycurrentinvindcdc3dcdc3_en=gnd0.11
µ
一个
r
ds(在)
p-channelmosfeton-resistancevindcdc3=v
(gs)
=3.6v310698m
Ω
I
lkg
p-channelleakagecurrentvindcdc3=6v0.12
µ
一个
r
ds(在)
n-channelmosfeton-resistancevindcdc3=v
(gs)
=3.6v220503m
Ω
I
lkg
n-channelleakagecurrentv
(ds)
=6V710
µ
一个
forwardcurrentlimit(p-andn-频道)2.5v<vindcdc3<6v1.051.21.35a
f
S
oscillatorfrequency1.31.51.7mhz
fixedoutputvoltagevindcdc3=2.5vto6v;
–2%2%
FPWMDCDC3=00mA
≤
I
O
≤
600mA
AllVDCDC3
fixedoutputvoltagevindcdc3=2.5vto6v;
–1%1%
FPWMDCDC3=10mA
≤
I
O
≤
600mA
adjustableoutputvoltagewithresistordiv-vindcdc3=vdcdc3+0.4v(min2.5v)至
–2%2%
ideratdefdcdc3fpwmdcdc3=06v;0ma
≤
I
O
≤
600mA
adjustableoutputvoltagewithresistordiv-vindcdc3=vdcdc3+0.4v(min2.5v)至
–1%1%
ideratdefdcdc3;fpwmdcdc3=16v;0ma
≤
I
O
≤
600mA
vindcdc3=vdcdc3+0.3v(最小值.2.5v)
lineregulation0.0%/v
to6v;i
O
=10mA
LoadRegulationI
O
=10mato400ma0.25%/一个
VDCDC3rampingfrom5%to95%oftarget
Softstartramptime750
µ
s
值
InternalresistancefromL3toGND1M
Ω
VDCDC3dischargeresistance300
Ω
8
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