LM3940LDX-3.3 Datasheet

Low Dropout Regulators - LDO


The LM3940LDX-3.3 is a 1A low dropout regulator designed to provide 3.3V from a 5V supply. The LM3940 is ideally suited for systems which contain both 5V and 3.3V logic, with prime power provided from a 5V bus. Because the LM3940LDX-3.3 is a true low dropout regulator, it can hold its 3.3V output in regulation with input voltages as low as 4.5V. The T0-220 package of the LM3940 means that in most applications the full 1A of load current can be delivered without using an additional heatsink. The surface mount TO-263 package uses minimum board space, and gives excellent power dissipation capability when soldered to a copper plane on the PC board. LM3940LDX-3.3 Features • Output voltage specified over temperature• Excellent load regulation• Guaranteed 1A output current• Requires only one external component• Built-in protection against excess temperature• Short circuit protected LM3940LDX-3.3 Applications • Laptop/Desktop Computers• Logic Systems


[{"Name":"Input Voltage MAX:","Value":"7.5 V"},{"Name":"Output Voltage:","Value":"3.3 V"},{"Name":"Dropout Voltage (Max):","Value":"0.8 V at 1A, 0.15 V at 100 mA"},{"Name":"Output Current:","Value":"1 A"},{"Name":" Load Regulation:","Value":"50 mV"},{"Name":"Number of Outputs:","Value":"1"},{"Name":"Maximum Operating Temperature:","Value":"+ 125 C"},{"Name":"Line Regulation:","Value":"40 mV"},{"Name":" Minimum Operating Temperature:","Value":"- 40 C"},{"Name":"","Value":""}]

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