(Hong Kong)
Product Summary
The LM3940 is a 1A low dropout regulator designed to provide 3.3V from a 5V supply. The device is ideally suited for systems which contain both 5V and 3.3V logic, with prime power provided from a 5V bus. Because the LM3940 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 it means that in most applications the full 1A of load current can be delivered without using an additional heatsink. The applications of the LM3940 include: Laptop/Desktop Computers, Logic Systems.
Parametrics
LM3940 absolute maximum ratings: (1)Storage Temperature Range: -65℃ to +150℃; (2)Operating Junction Temperature Range TO-220, TO-263, and SOT-223: -40℃ to +125℃; (3)Lead Temperature (Soldering, 5 seconds): 260℃; (4)Input Supply Voltage: 7.5V; (5)ESD Rating: 2 kV.
Features
LM3940 features: (1)Output voltage specified over temperature; (2)Excellent load regulation; (3)Guaranteed 1A output current; (4)Requires only one external component; (5)Built-in protection against excess temperature; (6)Short circuit protected.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||||
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 LM3940IMPX-3.3 |
National Semiconductor (TI) |
Low Dropout (LDO) Regulators |
Data Sheet |
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LM3940IS-3.3 |
National Semiconductor (TI) |
Low Dropout (LDO) Regulators |
Data Sheet |
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LM3940ISX-3.3 |
National Semiconductor (TI) |
Low Dropout (LDO) Regulators |
Data Sheet |
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LM3940IT-3.3 |
National Semiconductor (TI) |
Low Dropout (LDO) Regulators |
Data Sheet |
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LM3940LDX-3.3 |
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IC REG LDO 3.3V 1A 8-LLP |
Data Sheet |
Negotiable |
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LM3940LD-3.3/NOPB |
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IC REG LDO 3.3V 1A 8-LLP |
Data Sheet |
Negotiable |
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LM3940IT-3.3/NOPB |
National Semiconductor (TI) |
Low Dropout (LDO) Regulators 1A LDO REG |
Data Sheet |
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LM3940ISX-3.3/NOPB |
National Semiconductor (TI) |
Low Dropout (LDO) Regulators 1A LDO REG |
Data Sheet |
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