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Fujitsu manual BLOCK DIAGRAM for 1 channel, MB3842/MB3845

Models: MB3842 MB3845

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MB3842/MB3845

■BLOCK DIAGRAM (for 1 channel)

MB3842

Charge pump1

SS1

EN1

OSC1

VIN1

BGR1

Temperature protection 1

MB3845

Charge pump1

SS1

EN1

OSC1

VIN1

BGR1

Temperature protection 1

Over current

detection 1

Q S

FF1

COMP

−

Over current

detection 1

Q S

FF1

COMP

−

OUT1

CS1

COMP −

OC1

OUT1

CS1

COMP

−

OC1

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Fujitsu manual BLOCK DIAGRAM for 1 channel, MB3842/MB3845

Contents

FEATURES FUJITSU SEMICONDUCTOR DATA SHEETDESCRIPTION PACKAGEMB3842/MB3845 PIN ASSIGNMENTPIN DESCRIPTION SymbolMB3842/MB3845 Pin noBLOCK DIAGRAM for 1 channel MB3842/MB3845RECOMMENDED OPERATING CONDITIONS ABSOLUTE MAXIMUM RATINGSMB3842/MB3845 ELECTRICAL CHARACTERISTICS per 1 ch MB3842/MB3845DIAGRAM Normal operationAt V IN fall ContinuedAt over-temperature occurrence At overcurrent detectionMB3842/MB3845 ContinuedTYPICAL CHARACTERISTICS RLIM vs. limit current characteristicsCSS vs. TON SS characteristics MB3842/MB3845SW resistance vs. temperature characteristics MB3842/MB3845Continued ContinuedOutput power ISW saturation characteristics MB3842/MB3845Continued ContinuedMB3842/MB3845 Power derating characteristicsContinued Current Limit Setting Error Flag OC PinFUNCTIONAL DESCRIPTION Thermal ShutdownTYPICAL APPLICATION MB3842/MB3845MB3842/MB3845 Top View1 Dual-Port Self-Powered Hub Application NON-GANG Mode Connection APPLICATION EXAMPLEMB3842/MB3845 2 Dual-Port Bus Powered Hub Application GANG Mode Connection MB3842/MB3845USB Port1 ⋅4 USB Port2 ⋅4USAGE PRECAUTION 1. Never use settings exceeding maximum rated conditionsORDERING INFORMATION 2. Use this device within recommended operating conditionsPACKAGE DIMENSION These dimensions do not include resin protrusionMB3842/MB3845 C 1994 FUJITSU LIMITED F20012S-2C-4FUJITSU LIMITED MB3842/MB3845