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HT7465 Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT7465 Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 11 page  Rev. 1.00 1 September 02, 2011 Rev. 1.00 PB September 02, 2011 HT7465 2A Step-Down DC to DC Converter Feature • Inputvoltagerange:4.75Vto24V • Variableoutputvoltagerange:0.92Vto20V • 2Aoutputcurrent • Efficiencyupto92% • Fixed380kHzoperatingfrequency • 20mAshutdowncurrent • InternalpowerMOSFETswitch • StableoperationusinglowESRceramiccapacitors • Overtemperatureprotection • Cycle-by-cycleovercurrentprotection • Soft-startfunction • Undervoltagelockoutprotection • 8-pinSOPand10-pinMSOPpackage Applications • Batterychargers • Distributedpowersystems • LEDpowersupplies • DSLmodems • Linearregulatorprepowerprocessing • Set-Top-Boxes,DVDplayers,LCDdisplays General Description TheHT7465isa2Ahighefficiencystep-downDC- DCconverterwhichincludesafullyintegratedMOS powertransistor.Thedeviceusesacurrent-mode controloperatingmethodologyandcanoperateovera wideinputvoltagerangeof4.75Vto24Vforwhichit canprovideastableadjustableoutputvoltage. Thedeviceincludesovertemperatureprotection, overcurrentprotectionandundervoltagelockout protection,featureswhichcombinetopreventdevice damageduetooverloadconditions.Initsshutdown modetheregulatordrawsamere20uAofsupply current. Thedeviceisavailablein8-pinSOPand10-pin MSOPpackagetypesandprovidesaverycompact system solution with a minimum of external components. Application Circuit B230A VIN EN SS GND COMP HT7465 BS SW FB 22uF 10uF L 10nF 10nF R2 R1 VIN VOUT + × = 2 2 1 R R R V V FB OUT 4.75~24V C4 C1 C2 C3 R3 C6 C5 Efficiency vs Output Current |
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