LM2597N-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2597N-12/NOPB is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, operating at a fixed 150 kHz switching frequency. It provides a fixed 12 V output with a maximum load current of 500 mA. The device accepts an input voltage range of 4.5 V to 60 V and features a low quiescent current of 5 mA. It includes internal frequency compensation and a shutdown feature for power management. The component is housed in an 8-pin MDIP (Multiwatt) package and operates within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-voltage switch capable of handling up to 60 V input
• Fixed 150 kHz switching frequency reduces external component size
• Built-in thermal shutdown and current limiting protection
• Requires minimal external components for standard buck topology

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulators for switching regulators
• Battery chargers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches the design requirements, as the 'N' suffix indicates a through-hole Multiwatt package distinct from surface-mount variants. Confirm the 'NOPB' suffix denotes lead-free and RoHS compliance. Ensure the fixed 12 V output aligns with the target load voltage, as adjustable versions are available within the same series.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 12 V output is required from a high-voltage input source up to 60 V. The 500 mA current rating suits low-power applications. Consider the through-hole package for prototyping or specific mechanical constraints. Compare against the LM2594 series if lower input voltage limits are acceptable, or the LM2596/LM2599 series if higher output currents are needed.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2597HV series, designed for high-input voltage applications. It is part of Texas Instruments' SIMPLE SWITCHER family, which emphasizes ease of design with minimal external parts. The LM2597N variant specifically offers through-hole mounting options compared to the surface-mount MX or VM packages.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2597N-ADJ/NOPB for adjustable output; LM2597MX-12/NOPB for surface-mount equivalent.