| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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3,100 pcs
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3100 pcs | On Request | 1 | On Request | On Request | 1837+ | On Request | On Request | |
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2,254 pcs
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2254 pcs | On Request | 1 | On Request | On Request | 25+ | On Request | On Request | |
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2,033 pcs
|
2033 pcs | On Request | 1 | On Request | On Request | 17+ | On Request | On Request | |
| On Request | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The LM3940ISX-3.3/NOPB from Texas Instruments is a 1-A low-dropout (LDO) linear voltage regulator. It is specifically designed to provide a stable 3.3-V output from an input voltage range of 4.5 V to 5.5 V, making it suitable for systems that utilize both 5-V and 3.3-V logic.
Key electrical characteristics include a maximum output current of 1 A and a typical dropout voltage of 310 mV at 100 mA. The regulator features built-in protection against over-temperature conditions and short circuits. It also offers a typical noise level of 150 µVrms and a PSRR of 32 dB at 100 KHz.
This device is available in a surface-mount DDPAK/TO-263-3 package, which minimizes board space while providing excellent power dissipation. The TO-220 package variant can deliver the full 1 A load current without an additional heatsink in most applications. The operating temperature range is -40°C to 125°C.
The LM3940 is well-suited for applications where a reliable and efficient voltage conversion is needed from a higher voltage bus, such as in power management for electronic devices and systems.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.72 | $0.72 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The input voltage range is 4.5V to 5.5V.
The output voltage is fixed at 3.3V.
The maximum output current is 1A.
The maximum dropout voltage is 0.2V at 100mA; typical dropout is 310mV.
The operating temperature range is -40°C to 125°C.
It is available in a surface mount DDPAK/TO-263-3 package (TO-263-4, D²Pak).
It includes over temperature and short circuit protection.