Is there a pin-compatible replacement for LP2985-33DBVR?

No direct pin-compatible replacements were identified in this review. Potential alternatives have a different function on pin 4 (NC vs. BYP), which requires circuit verification.

What risks should I check before replacing LP2985-33DBVR?

Key risks include higher dropout voltage, which can affect performance in low-headroom applications, and pinout differences, specifically the lack of a bypass pin on alternatives.

LP2985-33DBVR Alternatives, Datasheet & Cross Reference | Texas Instruments

Find and compare alternatives for the LP2985-33DBVR, a 150mA SOT-23-5 LDO regulator from Texas Instruments. Review functional alternatives and key parametric differences before making a substitution.

AI replacement insight

Electrical riskmedium

Higher dropout voltage and missing BYP pin function.

Package risklow

SOT-23-5 package is a common match.

Can it be replaced directly?

No direct drop-in replacement for LP2985-33DBVR was found. All candidates require circuit and performance validation.

Best replacement path

Functional alternatives like TPMIC5219-3.3YM5 exist but require engineering review.

Main risk

The primary risks are increased dropout voltage and pinout differences, which may impact circuit stability and performance.

Recommended alternatives

Functional alternative with much higher output current, but has higher dropout and lacks a bypass pin.

View details

Alternative comparison matrix

Feature / factor	LP2985-33DBVR	TPMIC5219-3.3YM5	TPAP2204K-3.3TRG1	Compatibility / risk
Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5 — Package matches.; TPAP2204K-3.3TRG1: Package matches.
Voltage	3.3 V	3.3 V	3.3 V	3.3 V — Output voltage matches.; TPAP2204K-3.3TRG1: Output voltage matches.
Current	150 mA	500 mA	200 mA	500 mA / 200 mA — Significantly higher output current capability.; TPAP2204K-3.3TRG1: Higher output current capability.
Dropout Voltage	280 mV @ 150 mA	0.42 V @ 100 mA	0.75 V @ 100 mA	0.42 V @ 100 mA / 0.75 V @ 100 mA — Higher dropout voltage.; TPAP2204K-3.3TRG1: Significantly higher dropout voltage.
Pinout	Pin 4 is BYP	Pin 4 is NC	Pin 4 is NC	Pin 4 is NC — Target has BYP pin for noise reduction; candidate has No Connect.; TPAP2204K-3.3TRG1: Target has BYP pin for noise reduction; candidate has No Connect.

Application & sourcing insights

Questions & answers

While no direct pin-to-pin replacement was found, parts like TPMIC5219-3.3YM5 offer similar function with higher current but require review due to different dropout voltage and pinout.