AP1509-33SG-13
Diodes Incorporated
Needs validationhigh risk
Matches output voltage and frequency, but has a critically lower max input voltage (22V).
Best Alternatives to LM2594M-3.3(UMW)
Finding a substitute for the LM2594M-3.3(UMW) DC-DC converter is challenging due to its wide 4.5V to 60V input range. While several functional alternatives exist, they typically have lower voltage ratings and require careful engineering review.
AI replacement insight
Electrical riskhigh
Most alternatives have a much lower max input voltage rating than the target's 60V.
Package riskmedium
While packages match, pinouts are unverified and may differ, requiring PCB changes.
Firmware riskmedium
Not applicable for this component type.
Can it be replaced directly?
No direct, drop-in replacement for LM2594M-3.3(UMW) has been identified. All alternatives have significant parametric differences, most critically a lower maximum input voltage.
Best replacement path
Filter candidates by your application's required input voltage range first. If below 22V, AP1509-33SG-13 is the closest functionally. Otherwise, a full redesign is likely needed.
Main risk
The primary risk is electrical overstress. Using a substitute with a lower maximum input voltage (e.g., 22V or 40V) in a system designed for 60V will cause immediate failure.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | LM2594M-3.3(UMW) | AP1509-33SG-13 | NDP2450KC | NDP13401KC | Compatibility / risk |
|---|---|---|---|---|---|
| Voltage | 3.3V Fixed | 3.3V Fixed | Adjustable | Adjustable | 3.3V Fixed / Adjustable — Fixed 3.3V output matches.; NDP2450KC: Requires external feedback resistors.; NDP13401KC: Requires external feedback resistors.; NDP1360KC: Requires external feedback resistors. |
| Switching Frequency | 150kHz | 150kHz | 300kHz | 110kHz | 150kHz / 300kHz / 110kHz / 130kHz — Frequency matches target.; NDP2450KC: Requires recalculating external components.; NDP13401KC: Requires recalculating external components.; NDP1360KC: Slightly different, may require component review. |
| Temperature | -40°C to +125°C | -20°C to +85°C | - | - | -20°C to +85°C — Narrower operating temperature range. |
| Pinout | SOP-8 | SOP-8 | SOP-8 | SOP-8 | SOP-8 — Pinout must be verified from datasheet.; NDP2450KC: Pinout must be verified from datasheet.; NDP13401KC: Pinout must be verified from datasheet.; NDP1360KC: Pinout must be verified from datasheet. |
| Current | 1.5A | - | 5.0A | 4.0A | 5.0A / 4.0A / 6.0A — Higher output current capability.; NDP13401KC: Higher output current capability.; NDP1360KC: Significantly higher output current. |
Application & sourcing insights
Questions & answers
No direct drop-in replacement is available. The best alternative depends on your specific input voltage needs. For applications under 22V, AP1509-33SG-13 is functionally similar. For higher voltages, all found candidates require careful review and redesign.