LM340ASX-5.0/NOPB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LM340ASX-5.0/NOPB is a fixed-output linear voltage regulator from the LM340A series, manufactured by Texas Instruments. It provides a nominal 5V output with an absolute maximum input voltage of 35V and can deliver up to 1A of continuous output current. The device utilizes a TO-263 surface-mount package (D2PAK-3) and operates within a temperature range of 0°C to +125°C. Key electrical characteristics include a typical line regulation of 10mV and load regulation of 10mV at 25°C. It incorporates internal thermal overload protection, short-circuit current limiting, and output transistor safe-area compensation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated thermal overload protection prevents damage during excessive heat conditions.
• Internal short-circuit current limit safeguards the device against output faults.
• Output transistor safe-area compensation ensures stability under varying load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Local on-card voltage regulation for noise elimination
• Distribution problem mitigation in power systems
• Fixed voltage reference generation

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix 'SX' corresponds to the tape and reel packaging format as documented in the manufacturer's official datasheet. Confirm that the 'NOPB' designation indicates lead-free and RoHS compliance status according to the component's environmental specifications. Ensure the selected variant matches the required operating temperature range and package dimensions for your PCB layout.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a robust, single-output positive regulator is required for applications demanding high reliability and built-in fault protection. The LM340A series offers tighter voltage tolerances compared to standard variants. Consider the thermal performance of the TO-263 package and ensure adequate copper area on the PCB for effective heat dissipation during operation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the LM340/LM78XX family of 3-terminal positive regulators. These devices are designed as monolithic integrated circuits featuring internal current-limiting and thermal shutdown capabilities. The series is widely used for general-purpose regulation tasks where simplicity and ruggedness are prioritized over ultra-low dropout performance.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LM340S-5.0/NOPB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

Is an output bypass capacitor required for the LM340ASX-5.0/NOPB?

No, it is not necessary to bypass the output for stability, although adding a capacitor can improve transient response.

What happens if the ground pin becomes disconnected while powered?

If the ground pin disconnects, the output voltage approaches the unregulated input level, which may cause damage to other connected circuits or the regulator itself upon reconnection.