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UCD9240RGCR Datasheet(PDF) 7 Page - Texas Instruments |
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UCD9240RGCR Datasheet(HTML) 7 Page - Texas Instruments |
7 / 21 page UCD9240 Digital Point of Load System Controller SLUS766 – APRIL 2007 www.ti.com 7 ELECTRICAL SPECIFIACTIONS Recommended operating conditions SYMBOL PARAMETER MIN NOM MAX UNIT V33D,V33DIO,V33A Supply voltage during operation 3.0 3.3 3.6 V TA Operating free-air temperature range -40 125 C Absolute Maximum Ratings 1 Voltage applied at V33D to DVss -0.3 V to 3.6 V Voltage applied at V33A to AVss -0.3 V to 3.6 V Voltage applied to any pin (see NOTE) -0.3 V to V33D + 0.3 V Storage temperature, TSTG -40C to 150C Electrical Characteristics Supply Current SYMBOL PARAMETER TEST CONDITION MIN NOM MAX UNIT I33a Supply current V33A = 3.3V 15 mΑ I33dio Supply current V33DIO = 3.3V mΑ I33d Supply current V33D = 3.3V 40 mΑ I33d Supply current V33D = 3.3V storing configuration parameters in flash memory TBD mΑ Regulator Inputs/Outputs SYMBOL PARAMETER TEST CONDITION MIN NOM MAX UNIT Vreg BPCap Bypass Capacitor Voltage 1.8 V V33 3.3V Linear Regulator 3.25 3.3 3.35 V V33FB 3.3V linear Reg Feedback 4.0 4.6 V I33FB Series pass base drive Vin = 12V 10 mA Beta Series NPN pass device 40 Bias Supply Generator Two supply voltages, 3.3 and 1.8 V, are required. An internal series pass regulator generates 1.8 V from the 3.3 V supply. It requires a 0.1 to 1 uF bypass capacitor from BPCap to ground. The 3.3 V can either be supplied from an external source, or generated from Vin with regulation circuitry built into the UCD9240 that drives an external series pass NPN transistor. Transistor beta must be at least 40. The typical application circuit shows the base of 1 Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE: All voltages referenced to VSS. |
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