Is there a pin-compatible replacement for LMR36520FADDAR?

Yes, several parts in TI's LMR336xx and LMR140xx series, like LMR33620ADDAR, share the same HSOIC-8 package and are pin-compatible. However, their electrical ratings, especially the maximum input voltage, are significantly lower and must be verified.

What risks should I check before replacing LMR36520FADDAR?

The primary risk is the lower maximum input voltage of all common alternatives (typically 36V-40V vs. 65V). Exceeding this can damage the part. Also, check for differences in switching frequency, which may require changes to external components like inductors and capacitors.

LMR36520FADDAR Alternatives, Datasheet & Cross Reference | Texas Instruments

LMR36520FADDAR is a robust 65V, 2A step-down converter from Texas Instruments. Finding a direct replacement is challenging due to its high input voltage rating, a critical parameter for many industrial and automotive applications.

AI replacement insight

Electrical riskhigh

All candidates have a much lower max input voltage rating (36-40V vs 65V).

Package risklow

Most candidates share the same HSOIC-8 package and are likely pin-compatible.

Electrical riskmedium

Some candidates have different switching frequencies, requiring external component changes.

Can it be replaced directly?

No, there is no direct drop-in replacement for LMR36520FADDAR among the candidates due to the significantly lower input voltage rating of all alternatives.

Best replacement path

Verify the application's maximum input voltage. If it is under 36V, LMR33620ADDAR is the best functional match. If between 36V and 40V, use LMR14020SDDAR. If above 40V, none of these candidates are suitable.

Main risk

The critical risk is the lower maximum input voltage (36V-40V vs. 65V), which could lead to device failure if the application's voltage exceeds this limit.

Recommended alternatives

Pin-compatible alternative with matched current and frequency, but a much lower 36V max input voltage.

View details

Alternative comparison matrix

Feature / factor	LMR36520FADDAR	LMR33620ADDAR	LMR14020SDDAR	LMR33630BDDAR	Compatibility / risk
Input Voltage Max	65V	36V	40V	36V	36V / 40V — Significant downgrade from target's 65V. Must verify application voltage.; LMR14020SDDAR: Significant downgrade from target's 65V. Must verify application voltage.; LMR33630BDDAR: Significant downgrade from target's 65V.
Package	HSOIC-8	HSOIC-8	HSOIC-8	-	HSOIC-8 — Package and pin count match.; LMR14020SDDAR: Package and pin count match.
Output Current	2A	2A	2A	3A	2A / 3A — matched; LMR14020SDDAR: matched; LMR33630BDDAR: Higher current capability.
Switching Frequency	400kHz	400kHz	Adj. 200kHz-2.5MHz	1.4MHz	400kHz / Adj. 200kHz-2.5MHz / 1.4MHz — matched; LMR14020SDDAR: Target's 400kHz is within range. May require resistor change.; LMR33630BDDAR: Much higher frequency requires external component changes.
Pinout	HSOIC-8 Pinout	Confirmed by TI	Not verified	Confirmed by TI	Confirmed by TI / Not verified — TI documentation confirms pin-compatibility within this family.; LMR14020SDDAR: Requires datasheet check, but likely compatible with other TI HSOIC-8 regulators.; LMR33630BDDAR: TI documentation confirms pin-compatibility within this family.

Application & sourcing insights

Questions & answers

There is no direct drop-in replacement. If your application's maximum input voltage is below 36V, LMR33620ADDAR is a strong functional alternative with the same current and frequency. For voltages up to 40V, consider LMR14020SDDAR.