Description

The LM3402MR is a monolithic 3-terminal positive voltage regulator in the LM140/LM340A/LM340/LM7800C series. This regulator is designed to provide a fixed voltage output and has internal current-limiting, thermal shutdown, and safe-area compensation features. It can deliver over 1.0A output current with adequate heat sinking. The LM3402MR is suitable for a wide range of applications, including local regulation for noise elimination and distribution problems. It can also be used with external components to obtain adjustable output voltages and currents.

Specifications and features

- Complete specifications at 1A load
- Output voltage tolerances of ±2% at Tj = 25˚C and ±4% over the temperature range (LM340A)
- Line regulation of 0.01% of VOUT/V of ∆VIN at 1A load (LM340A)
- Load regulation of 0.3% of VOUT/A (LM340A)
- Internal thermal overload protection
- Internal short-circuit current limit
- Output transistor safe area protection
- P+ Product Enhancement tested

Application Scenarios

The LM3402MR is commonly used in LED driver applications. Its voltage regulation capabilities and protection features make it suitable for local regulation on LED driver boards. It can also be used in other applications that require fixed or adjustable voltage regulation.

Comparison

- Internal current-limiting ensures protection against excessive current
- Thermal shutdown feature protects against overheating
- Safe-area compensation provides additional protection to the output transistor
- P+ Product Enhancement tested for improved performance and reliability - Output voltage tolerances may have a slight variation under different temperature conditions
- Load regulation is 0.3% of VOUT/A, which may not be suitable for applications requiring precise current regulation.