LM3940IT-3.3/NOPB Part Information
Details for LM3940IT-3.3/NOPB by Texas Instruments
Semiconductors - ICs > Power Management ICs - PMIC > Voltage Regulators
Part Description
The LM3940 is a 1-A low-dropout regulator designed to provide 3.3 V from a 5-V supply. The LM3940 is ideally suited for systems which contain both 5-V and 3.3-V logic, with prime power provided from a 5-V bus. Because the LM3940 is a true low dropout regulator, it can hold its 3.3-V output in regulation with input voltages as low as 4.5 V. The TO-220 package of the LM3940 means that in most applications the full 1 A of load current can be delivered without using an additional heatsink. The surface mount DDPAK/TO-263 package uses minimum board space, and gives excellent power dissipation capability when soldered to a copper plane on the PC board.
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Part Features
- Built-in Protection against Excess Temperature
- Excellent Load Regulation
- Input Voltage Range: 4.5 V to 5.5 V
- Output Voltage Specified over Temperature
- Requires only One External Component
- Short-Circuit Protected
- Specified 1-A Output Current
Part Specifications
Output Type | Fixed |
Input Voltage Min | 0V |
Input Voltage Max | 7.5V |
Fixed Output Voltage Nom. | 3.3V |
Adjustable Output Voltage Min | - |
Adjustable Output Voltage Max | - |
Output Current | 1A |
Dropout Voltage Vdo | 500mV |
LDO Regulator Case Style | TO-220 |
No. of Pins | 3Pins |
Operating Temperature Min | -40°C |
Operating Temperature Max | 125°C |
Product Range | 3.3V 1A LDO Voltage Regulators |
Automotive Qualification Standard | - |
RoHS Phthalates Compliant | Yes |
MSL | - |
SVHC | No SVHC (27-Jun-2018) |
No. of Outputs | 1Outputs |
Operating Temperature Range | -40°C to +125°C |
Output Voltage Nom. | 3.3V |
Primary Input Voltage | 5V |
Supply Voltage Max | 7.5V |
Supply Voltage Min | 4.5V |
Termination Type | Through Hole |
Voltage Regulator Type | LDO Fixed Positive |
Alternative Part Descriptions
- 1A,3.3V,LDO Voltage Reg.,LM3940IT-3.3 | RS Components
- IC, V REG, LINEAR, 3.3V; Output Type:Fixed; Input Voltage Min:0V; Input Voltage Max:7.5V; Fixed Output Voltage Nom.:3.3V; Adjustable Output Voltage Min:-; Adjustable Output Voltage Max:-; Output Current:1A; Dropout Voltage Vdo:500mV;RoHS Compliant: Yes | Newark Electronics
- LDO Regulator Pos 3.3V 1A 3-Pin(3+Tab) TO-220 Rail | Avnet America
- IC: voltage regulator; LDO,fixed; 3.3V; 1A; TO220-3; THT; -40÷125°C | Transfer Multisort Elektronik
- LDO U-Reg +3,3V 1A TO220 | Schukat Electronic
- 1-A, low-dropout voltage regulator for 5-V to 3.3-V conversion | Texas Instruments
- LDO Voltage Regulator [Texas Instruments] LM3940IT-3.3/NOPB LDO Voltage Regulator | Distrelec