LM2937ET-3.3/NOPB National Semiconductor, LM2937ET-3.3/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM2937ET-3.3/NOPB
• Description: IC REGULATOR LDO TO220-3
• Manufacturer: National Semiconductor
• Type: Voltage Regulatorr

Specifications of LM2937ET-3.3/NOPB

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 26V
• Voltage - Dropout (typical): 0.11V @ 50mA
• Number Of Regulators: 1
• Current - Output: 500mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-3 (Straight Leads)
• Current, Output: 500 mA
• Current, Supply: 10 mA
• Package Type: TO-220
• Regulation, Line: 9.9 mV
• Regulation, Load: 3.3 mV
• Regulator Type: Positive Voltage Out
• Resistance, Thermal, Junction To Case: 3 °C/W
• Temperature, Operating, Range: -40 to +125 °C
• Voltage, Input: 26 V
• Voltage, Noise: 99 μV
• Voltage, Output: 3.3 V
• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Fixed
• Polarity Type: Positive
• Number Of Outputs: Single
• Input Voltage (min): 4.75V
• Input Voltage (max): 26V
• Output Voltage: 3.3V
• Output Current: 500mA
• Load Regulation: 3.3mV
• Line Regulation: 9.9mV
• Output Voltage Accuracy: ±5%
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Pin Count: 3 +Tab
• Mounting: Through Hole
• Polarity: Positive
• Input Voltage Max: 26 V
• Output Type: Fixed
• Voltage Regulation Accuracy: +/- 5 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device
• Other names: *LM2937ET-3.3; *LM2937ET-3.3/NOPB; LM2937ET-3.3

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Electrical Characteristics
Note 5: The minimum input voltage required for proper biasing of these regulators is 4.75V. Below this level the outputs will fall out of regulation. This effect is not
the normal dropout characteristic where the output falls out of regulation due to the PNP pass transistor entering saturation. If a value for worst case effective input
to output dropout voltage is required in a specification, the values should be 2.37V maximum for the LM2937-2.5 and 1.6V maximum for the LM2937-3.3.
Typical Performance Characteristics
Quiescent Current vs
Output Current (2.5V)
Quiescent Current vs
Input Voltage (2.5V)
Temperature (2.5V)
Output Voltage vs
(Note 4) (Continued)
10011302
10011306
10011304
4
Quiescent Current vs
Output Current (3.3V)
Quiescent Current vs
Input Voltage (3.3V)
Temperature (3.3V)
Output Voltage vs
10011303
10011307
10011305