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Best Alternatives to TPS73633DBVR

Package: SC-74A, SOT-753Texas InstrumentsVoltage Regulators - LinearSeries: -Package: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - Input (Max): 5.5VVoltage - Output (Min/Fixed): 3.3VVoltage - Output (Max): -

TPS73633DBVR is a popular 3.3V, 400mA LDO from Texas Instruments in a SOT-23-5 package, known for its very low dropout voltage. Finding a substitute requires careful review of input voltage range, dropout, and output current.

AI replacement insight

Electrical riskhigh

Mismatches in Vin(min) and dropout voltage are common and critical.

Package risklow

SOT-23-5 is a standard package with a common pinout for this function.

Sourcing riskmedium

The target is from a major manufacturer; alternatives may have different supply chain stability.

Can it be replaced directly?

No perfect drop-in replacement exists. While several parts are pin-compatible, all have different electrical trade-offs, especially regarding minimum input voltage and dropout performance.

Best replacement path

For applications not sensitive to minimum input voltage, TPL740F33-5TR is a strong candidate with a higher current rating. For low-power, battery-operated circuits, the target's low Vin and low dropout are critical.

Main risk

The primary risk is system failure in low-voltage conditions, as most alternatives require a higher minimum input voltage than the target's 1.7V.

Recommended alternatives

2
TPL740F33-5TR package
TPL740F33-5TR

3PEAK

Needs validationmedium risk

Pin-compatible SOT-23-5 LDO with higher current (500mA) but requires a higher minimum input voltage.

View details

Alternative comparison matrix

Feature / factorTPS73633DBVRTPL740F33-5TRTPMIC5219-3.3YM5RP114N331D-TR-FFCompatibility / risk
PackageSOT-23-5SOT-23-5SOT-23-5SOT-23-5SOT-23-5 — Pinout is compatible for fixed voltage LDO.; TPMIC5219-3.3YM5: Pinout is compatible.; RP114N331D-TR-FF: Pinout is compatible.
Voltage1.7 V to 5.5 V2.4 V to 5.5 V2 V to 20 V3.3 V2.4 V to 5.5 V / 2 V to 20 V / 3.3 V — Higher minimum input voltage required.; TPMIC5219-3.3YM5: Higher minimum input voltage required.; RP114N331D-TR-FF: Output voltage matches.
Current400 mA500 mA500 mA300 mA500 mA / 300 mA — Higher output current capability.; TPMIC5219-3.3YM5: Higher output current capability.; RP114N331D-TR-FF: Lower output current capability.
Temperature-40°C to +125°C-40°C to +125°C-40°C to 85°C-40°C to 85°C-40°C to +125°C / -40°C to 85°C — Operating temperature range matches.; TPMIC5219-3.3YM5: Reduced maximum operating temperature.; RP114N331D-TR-FF: Reduced maximum operating temperature.
Quiescent Current550 µA--50 µA50 µA — Significantly lower quiescent current.

Application & sourcing insights

Questions & answers

The best alternative depends on your application's specific needs. TPL740F33-5TR offers higher current (500mA) but requires a higher minimum input voltage (2.4V). Always verify key parameters against your design requirements.