TEXAS INSTRUMENTS LM2937IMP-3.3/NOPB Voltage Regulator 3.3V 400mA SOT-223-4

The TEXAS INSTRUMENTS LM2937IMP-3.3/NOPB is a positive voltage regulator designed to deliver a fixed 3.3V output with a maximum output current of 400mA. It is an ideal solution for converting a common 5V logic supply or higher input voltages (ranging from 4.75V to 26V) down to a stable 3.3V supply needed to power very-large-scale integration (VLSI) ASICs and microcontrollers in a wide array of electronic applications.

The regulator incorporates advanced circuitry that minimises quiescent current, drawing only 10mA typically when supplying 500mA of load current (with an input-to-output differential greater than 5V). It requires an output bypass capacitor for stability; thanks to integrated compensation, it is stable even with low ESR chip capacitors, supporting an ESR range of 0.01Ω to 5Ω.

This component provides robust protection features, including internal short circuit and thermal overload protection, reverse battery input protection, and 60V input transient protection, ensuring reliable operation in demanding environments. The output is trimmed for 5% tolerance under all operating conditions, guaranteeing consistent performance.

The device is surface-mounted in a compact SOT-223-4 package and operates over a wide temperature range from -40°C to 85°C. It is a green product, free from antimony and bromine, making it suitable for environmentally conscious designs.

Typical applications include automotive systems, industrial controls, automation, process control, power management, and other applications requiring a dependable 3.3V supply from a higher input voltage.

Key Specifications

• Output Type: Fixed
• Output Voltage: 3.3V
• Maximum Output Current: 400mA (up to 500mA possible)
• Input Voltage Range: 4.75V to 26V
• Package: SOT-223-4
• Mounting: Surface Mount
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10mA typical
• Output Capac1