Texas Instruments LM3940IMPX-3.3/NOPB 1 Output 3.3V 1A SOT-223-4
Categories Integrated Circuits (ICs)
PMIC - Voltage Regulators - Linear
Manufacturer Texas Instruments
Series-
Packaging Digi-Reel®
Part Status Active
Output ConfigurationPositive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 7.5V
Voltage - Output (Min/Fixed) 3.3V
Voltage - Output (Max)-
Voltage Dropout (Max) 0.2V @ 100mA
Current - Output 1A
PSRR-
Control Features-
Protection Features Over Temperature, Short Circuit
Operating Temperature-40°C ~ 125°C
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Supplier Device PackageS OT-223-4
Base Part Number LM3940
For best overall performance, place all the circuit components on the same side of the circuit board and as near as practical to the respective LDO pin connections. Place ground return connections to the input and output capacitor, and to the LDO ground pin as close to each other as possible, connected by a wide, component-side, copper surface. The use of vias and long traces to create LDO circuit connections is strongly discouraged and negatively affects system performance. This grounding and layout scheme minimizes inductive parasitic, and thereby reduces load-current transients, minimizes noise, and increases circuit stability. A ground reference plane is also recommended and is either embedded in the PCB itself or located on the bottom side of the PCB opposite the components. This reference plane serves to assure accuracy of the output voltage, shield noise, and behaves similar to a thermal plane to spread heat from the LDO device. In most applications, this ground plane is necessary to meet thermal requirements.
PMIC - Voltage Regulators - Linear
Manufacturer Texas Instruments
Series-
Packaging Digi-Reel®
Part Status Active
Output ConfigurationPositive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 7.5V
Voltage - Output (Min/Fixed) 3.3V
Voltage - Output (Max)-
Voltage Dropout (Max) 0.2V @ 100mA
Current - Output 1A
PSRR-
Control Features-
Protection Features Over Temperature, Short Circuit
Operating Temperature-40°C ~ 125°C
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Supplier Device PackageS OT-223-4
Base Part Number LM3940
For best overall performance, place all the circuit components on the same side of the circuit board and as near as practical to the respective LDO pin connections. Place ground return connections to the input and output capacitor, and to the LDO ground pin as close to each other as possible, connected by a wide, component-side, copper surface. The use of vias and long traces to create LDO circuit connections is strongly discouraged and negatively affects system performance. This grounding and layout scheme minimizes inductive parasitic, and thereby reduces load-current transients, minimizes noise, and increases circuit stability. A ground reference plane is also recommended and is either embedded in the PCB itself or located on the bottom side of the PCB opposite the components. This reference plane serves to assure accuracy of the output voltage, shield noise, and behaves similar to a thermal plane to spread heat from the LDO device. In most applications, this ground plane is necessary to meet thermal requirements.
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