National Semiconductor LM2594 LM2594HV Simple Switcher® Power Converter 150 kHz, 0.5A Step-Down Voltage Regulator
Summary
The LM2594/LM2594HV is a high-efficiency, simple switch-mode step-down (buck) regulator designed for stable power conversion from input voltages up to 60V. This integrated circuit provides reliable fixed or adjustable outputs (e.g., 3.3V, 5V, 12V) with guaranteed 0.5A capability using minimal external components. Ideal for electronics designers who require compact, robust power solutions in low-power applications demanding high performance and thermal protection.
Manual Details
| Brand | National |
|---|---|
| Pages | 28 |
| File Size | 740.13 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What is the maximum input voltage this regulator can handle?
The LM2594HV variant handles inputs up to 60V, while other versions support up to 45V.
How many external components does it require for installation?
It requires only a minimum of 4 external components, making the design simple and efficient.
What protection features are included against electrical faults or high temperatures?
The unit features over temperature shutdown and a two-stage current limit protection for complete safety during fault conditions.
How does the switching frequency benefit circuit design?
Operating at a fixed 150 kHz allows for significantly smaller sized filter components than those needed with lower frequency regulators.