NATIONAL SEMICONDUCTOR LM2593HV User Guide
Summary
The LM2593HV is a high-efficiency DC-DC step-down (buck) switching regulator designed for powering stable voltages in sensitive electronics. This advanced constant current device operates at 150 kHz, ensuring reliable performance while minimizing component size. Manual documentation provides comprehensive technical specifications on fixed (3.3V, 5V) and adjustable versions, detailing its guaranteed 2A output capability. It is essential reading for electronics designers and engineers needing robust power management with integrated features such as soft-start, over-temperature shutdown, and high efficiency.
Manual Details
| Brand | National |
|---|---|
| Pages | 21 |
| File Size | 753.79 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What types of packages are available for the LM2593HV?
It is available in 7-pin TO-220, TO-263 surface mount, and various bent or staggered options.
How does the high operating frequency affect design?
Operating at 150 kHz allows for smaller sized filter components compared to lower frequency regulators.
What load current is guaranteed during operation?
The regulator guarantees a 4% tolerance on its output load current up to 2A.
What critical safety protections are included?
Protections feature two-stage current limit, over temperature shutdown, and dedicated error flags for fault condition coverage.