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Best Alternatives to LP3220SAB5F

Package: SOT23-5Lowpower Semiconductor Co., Ltd.PMIC - Voltage Regulators - DC DC Switching RegulatorsOutput Current: 1 ASwitching Frequency: 1.5 MHzInput Voltage Range: 2.2 V to 5.5 VOutput Voltage Range: 0.61 V to VINEfficiency: Up to 94%

LP3220SAB5F is a 1.5MHz, 1A synchronous buck converter in a SOT23-5 package. When searching for a replacement, the most critical factors are the SOT23-5 pinout, 1.5MHz switching frequency, and 2.2V to 5.5V input voltage range.

AI replacement insight

Electrical riskhigh

High risk if using parts with different pinouts or switching frequencies, requiring redesign.

Package risklow

All reviewed candidates use the same SOT23-5 package, minimizing mechanical risk.

Can it be replaced directly?

Yes, LP3220AB5F is a direct pin-to-pin replacement for LP3220SAB5F, sharing the same package, pinout, and key electrical parameters.

Best replacement path

The best replacement is LP3220AB5F from the same manufacturer and series, which is a pin-compatible match with identical electrical specifications.

Main risk

The main risk is using alternatives with different pinouts or switching frequencies, which requires a full board redesign and re-evaluation of external components.

Recommended alternatives

6
LP3220AB5F package
LP3220AB5F

LOWPOWER

Needs validationlow risk

Pin-compatible replacement from the same manufacturer and series with identical key electrical specifications.

View details

Alternative comparison matrix

Feature / factorLP3220SAB5FLP3220AB5FETA3496S2FETA3448S2FCompatibility / risk
PackageSOT23-5SOT23-5SOT23-5SOT23-5SOT23-5 — Package matches.; ETA3496S2F: Package matches.; ETA3448S2F: Package matches.; STI3411A: Package matches.
PinoutIN,GND,LX,FB,ENIN,GND,LX,FB,ENDifferentIN,GND,LX,EN,FBIN,GND,LX,FB,EN / Different / IN,GND,LX,EN,FB / EN,GND,LX,VIN,FB — Pinout is identical.; ETA3496S2F: Pinout is not compatible, requires PCB redesign.; ETA3448S2F: Pinout is not compatible (EN/FB swapped).; STI3411A: Pinout is not compatible, requires PCB redesign.
Voltage2.2V-5.5V2.2V-5.5V2.2V-7.2V2.5V-5.5V2.2V-5.5V / 2.2V-7.2V / 2.5V-5.5V / 2.5V-6.0V — Input voltage range matches.; ETA3496S2F: Wider input voltage range.; ETA3448S2F: Minimum input voltage is higher (2.5V vs 2.2V).; STI3411A: Input voltage range differs (2.5V min vs 2.2V).
Current1.0A1.0A1.2A3.0A1.0A / 1.2A / 3.0A / 2.0A — Output current matches.; ETA3496S2F: Slightly higher output current.; ETA3448S2F: Significantly higher output current.; STI3411A: Higher output current capability.
Switching Frequency1.5MHz1.5MHz1.2MHz2.0MHz1.5MHz / 1.2MHz / 2.0MHz / 1.0MHz — Switching frequency matches.; ETA3496S2F: Different frequency requires external component changes.; ETA3448S2F: Different frequency requires external component changes.; STI3411A: Different frequency requires external component changes.

Application & sourcing insights

Questions & answers

LP3220AB5F is the best alternative, offering a pin-compatible design with identical performance from the same manufacturer, LOWPOWER.