LM2594N-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2594N-ADJ/NOPB is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a step-down (buck) switching voltage regulator. It operates with an input voltage range of 4.5 V to 60 V and provides an adjustable output voltage ranging from 1.2 V to 37 V. The device supports a maximum output current of 500 mA at a fixed switching frequency of 150 kHz. Packaged in an 8-pin MDIP (Multi-Dual In-Line Package), it is designed for through-hole mounting. The component operates within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic controller simplifies design by requiring only external diode, inductor, and capacitor components.
• Fixed 150 kHz switching frequency allows for the use of small passive components while minimizing electromagnetic interference.
• Internal thermal shutdown and current limiting protect the device under overload or short-circuit conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring high efficiency
• Pre-regulators for linear post-regulator modules
• Efficient on-card regulation for board-level power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches the specific suffix; 'N' indicates MDIP through-hole packaging, distinct from SOIC surface-mount variants like 'M'. Confirm the '-ADJ' designation ensures adjustable output capability rather than fixed voltage options. Check for 'NOPB' suffix to ensure lead-free compliance. Ensure input voltage requirements do not exceed the 60 V absolute maximum rating for reliable operation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a through-hole solution is required for buck conversion applications. The 60 V input range accommodates higher voltage bus systems compared to standard 40 V variants. The adjustable output feature offers flexibility for custom voltage rails. Consider thermal management requirements due to the 500 mA continuous current capability in a standard DIP package.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2594 series belongs to Texas Instruments' SIMPLE SWITCHER family, known for reducing design complexity in DC-DC conversion. This specific model represents the high-voltage variant capable of handling up to 60 V inputs. It serves as a robust alternative to linear regulators in applications where input-output voltage differentials are significant, offering superior efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2594HVN-ADJ/NOPB: Higher voltage rated version with similar specifications but potentially different thermal characteristics. LM2594MX-ADJ/NOPB: Surface-mount equivalent using SOIC-8 package instead of MDIP. LM2594M-ADJ/NOPB: Surface-mount version with 40 V max input rating.