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SP7661 Datasheet(PDF) 1 Page - Sipex Corporation

No. de pieza SP7661
Descripción Electrónicos  Wide Input Voltage Range 3A, 600kHz, Buck Regulator
PDF  20 Pages
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Fabricante Electrónico  SIPEX [Sipex Corporation]
Página de inicio  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP7661 Datasheet(HTML) 1 Page - Sipex Corporation

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Nov3-06 Rev I
SP766 Wide Input Voltage Range 3A, 600kHz Buck Regulator
© 2006 Sipex Corporation
SP7661
FEATURES
■ 4.75Vto22VInputVoltageRangeusingSingleSupply
■ 3Vto22VInputVoltageRangeusingDualSupply
■ ±1%0.8VReference
■ 3AOutputCapability
■ CurrentLimitingusingInductorDCR
■ BuiltinLowRDS(ON) PowerSwitches
■ 600kHzFixedFrequencyOperation
■ OverTemperatureProtection
■ ShortCircuitProtectionwithAuto-Restart
■ WideBWAmpAllowsTypeIIorIIICompensation
■ ProgrammableSoftStart
■ FastTransientResponse
■ HighEfficiency:Greaterthan
93%Possible
■ NonsynchronousStart-UpintoaPre-ChargedOutput
■ AvailableinRoHSCompliant,LeadFreePackaging:
Small7mmx4mmDFN
■ U.S.Patent#6,922,041
Wide Input Voltage Range
3A, 600kHz, Buck Regulator
TheSP7661isasynchronousstep-downswitchingregulatoroptimizedforhighefficiency.Thepartisdesigned
forusewithasingle4.75Vto22Vsinglesupplyor3Vto22VinputifanexternalVccisprovided.TheSP7661
providesafullyintegratedbuckregulatorsolutionusingafixed600kHzfrequency,PWMvoltagemodearchitecture.
ProtectionfeaturesincludeUVLO,thermalshutdown,outputcurrentlimitandshortcircuitprotection.TheSP7661
isavailableinthespacesavingDFNpackage
.
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
PowerBloxTM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
BOTTOM VIEW
Heatsink Pad 1
Connect to Lx
Heatsink Pad 2
Connect to GND
Heatsink Pad 3
Connect to VIN
PGND
PGND
GND
VFB
COMP
UVIN
SWN
VIN
LX
LX
LX
LX
VCC
BST
LX
LX
LX
DFN PACKAGE
7mm x 4mm (Option 2)
SP7661
PGND
VINP
SS
ISN
ISP
PGND
GND
GND
GND
Pin 27
Pin 28
Pin 29
5
5
4
4
3
3
2
2


D
D
C
C
B
B
A
A
ISP
ISN
ISN
LX
LX
ISP
NC
VFB
VFB
12V (9.6V-22V)
SD101AWS
3.30V, 0-3A
GND
2

C5
100uF
VOUT
3

U1
SP7661
PGND

PGND
2
PGND
3
PGND
4
GND
5
VFB
6
COMP
7
SS
8
GND
9
ISN
0
ISP

SWN
2
VIN
3
LX
14
LX
15
LX
6
BST
7
VIN
18
GND
19
GND
20
UVIN
2
VCC
22
LX
23
LX
24
LX
25
LX
26
CZ2
6800pF
Rs2
1Ohm
C9 6.8nF
CP 56pF
C
22uF
R
0k
CBST
22nF
R
0Ohm
Cs2
2.2nF
C2
22uF
CVCC
4.7uF
GND
4

RZ3
400
R3
5.11K
DBST
R9
61.9k
RZ2
4.02k
R2
360
L1,Wurth-744311220
2.2uH,14mOhm,7x7mm,9A
VIN


CSS 47nF
R4
5.11K
CZ3
1500pF
C4 47nF
CF1
100pF


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