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SP7661_07 PDF预览

SP7661_07

更新时间: 2022-04-23 23:00:11
品牌 Logo 应用领域
西伯斯 - SIPEX 稳压器
页数 文件大小 规格书
20页 1039K
描述
Wide Input Voltage Range 3A, 600kHz, Buck Regulator

SP7661_07 数据手册

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SP7661  
Wide Input Voltage Range  
3A, 600kHz, Buck Regulator  
TM  
Power  
Blox  
SP7661  
DFN PACKAGE  
7mm x 4mm (Option 2)  
FEATURES  
■ꢀ 4.75Vꢀtoꢀ22VꢀInputꢀVoltageꢀRangeꢀusingꢀSingleꢀSupply  
■ꢀ 3Vꢀtoꢀ22VꢀInputꢀVoltageꢀRangeꢀusingꢀDualꢀSupply  
■ꢀ ±1%ꢀ0.8VꢀReference  
26  
25  
24  
23  
22  
21  
P
P
P
1
2
3
LX  
LX  
LX  
GND  
BOTTOM VIEW  
GND  
GND  
■ꢀ 3AꢀOutputꢀCapability  
Heatsink Pad 1  
Connect to Lx  
■ꢀ CurrentꢀLimitingꢀusingꢀInductorꢀDCR  
■ꢀ BuiltꢀinꢀLowꢀRDS(ON) ꢀPowerꢀSwitches  
■ꢀ 600kHzꢀFixedꢀFrequencyꢀOperation  
■ꢀ OverꢀTemperatureꢀProtection  
P
4
5
LX  
CC  
GND  
Pin 27  
GND  
V
6
7
UV  
V
FB  
IN  
COMP  
SS  
20  
19  
18  
17  
GND  
GND  
■ꢀ ShortꢀCircuitꢀProtectionꢀwithꢀAuto-Restart  
■ꢀ WideꢀBWꢀAmpꢀAllowsꢀTypeꢀIIꢀorꢀIIIꢀCompensation  
■ꢀ ProgrammableꢀSoftꢀStart  
Heatsink Pad 2  
Connect to GND  
8
9
GND  
ISN  
V
IN  
Pin 28  
10  
■ꢀ FastꢀTransientꢀResponse  
BST  
LX  
■ꢀ HighꢀEfficiency:ꢀGreaterꢀthanꢀ93%ꢀPossible  
■ꢀ NonsynchronousꢀStart-UpꢀintoꢀaꢀPre-ChargedꢀOutput  
■ꢀ AvailableꢀinꢀRoHSꢀCompliant,ꢀLeadꢀFreeꢀPackaging:  
Heatsink Pad 3  
Connect to VINP  
11  
12  
13  
16  
ISP  
SWN  
LX 15  
14  
Pin 29  
LX  
VINP  
Smallꢀ7mmꢀxꢀ4mmꢀDFNꢀ  
■ꢀ U.S.ꢀPatentꢀ#6,922,041  
DESCRIPTION  
TheꢀSP7661ꢀisꢀaꢀsynchronousꢀstep-downꢀswitchingꢀregulatorꢀꢀoptimizedꢀforꢀhighꢀefficiency.ꢀꢀTheꢀpartꢀisꢀdesignedꢀ  
forꢀuseꢀwithꢀaꢀsingleꢀ4.75Vꢀtoꢀ22Vꢀsingleꢀsupplyꢀorꢀ3Vꢀtoꢀ22VꢀinputꢀifꢀanꢀexternalꢀVccꢀisꢀprovided.ꢀTheꢀSP7661ꢀ  
providesꢀaꢀfullyꢀintegratedꢀbuckꢀregulatorꢀsolutionꢀusingꢀaꢀfixedꢀ600kHzꢀfrequency,ꢀPWMꢀvoltageꢀmodeꢀarchitecture.ꢀ  
ProtectionꢀfeaturesꢀincludeꢀUVLO,ꢀthermalꢀshutdown,ꢀoutputꢀcurrentꢀlimitꢀandꢀshortꢀcircuitꢀprotection.ꢀTheꢀSP7661ꢀ  
isꢀavailableꢀinꢀtheꢀspaceꢀsavingꢀDFNꢀpackage.  
TYPICAL APPLICATION CIRCUIT  
VIN 12V (9.6V-22V)  
VOUT  
3.30V, 0-3A  
C2  
Cꢀ  
L1,ꢀWurthꢀ-744311220  
2.2uH,ꢀ14ꢀmOhm,ꢀ7x7mm,ꢀ9A  
22uF 22uF  
LX  
3
R3  
5.11k  
R4  
5.11k  
2
GND  
C5  
C4 47nF  
2
26  
25  
24  
23  
22  
2ꢀ  
20  
19  
18  
ꢀ7  
ꢀ6  
15  
14  
PGND  
PGND  
PGND  
PGND  
GND  
VFB  
LX  
100uF  
R9  
ISP  
61.9k  
VFB  
LX  
LX  
ISN  
RZ3  
RZ2  
4.02k  
56pF  
3
CZ2  
U1  
400  
4
Rꢀ  
4
CVCC  
ꢀ0k  
SP7661  
LX  
6800pF  
4.7uF  
GND  
5
VCC  
UVIN  
GND  
GND  
VIN  
BST  
LX  
CZ3  
1500pF  
CPꢀ  
6
NC  
7
COMP  
SS  
VFB  
CSS 47nF  
R2  
CF1  
100pF  
8
3.16k  
9
GND  
ISN  
ꢀ0  
ꢀꢀ  
ꢀ2  
ꢀ3  
ISP  
SD101AWS  
DBST  
C9 6.8nF  
SWN  
VIN  
LX  
22nF  
LX  
CBST  
ISN  
ISP  
LX  
LX  
Rs2  
Cs2  
1ꢀOhm 2.2nF  
Mar ꢀ-07 Rev N  
SP766ꢀ Wide Input Voltage Range 3A, 600kHz Buck Regulator  
© 2007 Sipex Corporation  

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