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SP7661ERL/TR Datasheet(PDF) 1 Page - Sipex Corporation |
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SP7661ERL/TR Datasheet(HTML) 1 Page - Sipex Corporation |
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1 / 20 page  Mar -07 Rev N SP766 Wide Input Voltage Range 3A, 600kHz Buck Regulator © 2007 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 VINP 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 ISP ISN ISN LX LX ISP NC VFB VFB LX 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 Cs2 2.2nF C2 22uF CVCC 4.7uF GND 4 RZ3 400 R3 5.11k DBST R9 61.9k RZ2 4.02k R2 3.16k L1,Wurth-744311220 2.2uH,14mOhm,7x7mm,9A VIN CSS 47nF R4 5.11k CZ3 1500pF C4 47nF CF1 100pF |
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