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PINASSIGNMENTS
1
2
3
4
5
10
9
8
7
6
EN
VIN
VIN
地
FB
PGND
PGND
SW
SW
模式
dgq pACKAGE
(t运算 视图)
便条
:
这 powerpad 必须 是 连接 至 地.
1
2
3
4
5
10
9
8
7
6
EN
VIN
VIN
地
FB
PGND
PGND
SW
SW
模式
drc pACKAGE
(t运算 视图)
TPS62020
TPS62021
TPS62026
SLVS076C–JUNE2003–REVISEDDECEMBER2004
TerminalFunctions
终端
i/odescription
nameno.
en1ienable.pullingentogroundforcesthedeviceintoshutdownmode.pullingentov
I
enablesthedevice.en
shouldnotbeleftfloatingandmustbeterminated.
vin2,3isupplyvoltageinput
GND4Analogground
fb5ifeedback.connectanexternalresistordividertothispin.
ifafixed-输出-voltagedeviceisued,connectfbdirectlytotheoutput.
mode6ithedifferencebetweentps6202xandtps62021isthelogiclevelofthemodepin.thetps62021hasan
modeactive-lowmodepin.thetps6202xisforcedintofixed-frequencypwmmodebypullingthemodepinhigh.
pullingthemodepinlowenablesthepowersavemode,operatinginpfmmode(pulsefrequencymodulation)
atlightloadcurrent,andinfixedfrequencypwmatmedimumtoheavyloadcurrents.incontrast,thetps62021
isforcedintopwmmodebypullingthemodepinlow.
sw7,8i/othisistheswitchpinoftheconverterandconnectedtothedrainoftheinternalpowermosfets
pgnd9,10powerground
4
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