ProjectsPricingInsights

Best Alternatives to LM1085IS-3.3RG

Package: TO-263-3HANSCHIP semiconductorAmplifiersOutput Voltage: 3.3VOutput Current: 3ADropout Voltage: 1.5V max @ 3AInput Voltage: 15V maxLine Regulation: 0.04%

LM1085IS-3.3RG is a 3.3V, 3A LDO voltage regulator in a TO-263-3 package. When seeking alternatives, focus on matching output voltage, current capability, package, and pinout.

AI replacement insight

Electrical risklow

Many candidates match key specs.

Package risklow

TO-263-3 is a standard package.

Can it be replaced directly?

Direct replacement for LM1085IS-3.3RG should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

AMS1085CM-3.3 offers a near-identical profile, while LM39300R-3.3 provides a performance upgrade with lower dropout voltage.

Main risk

The primary risk is an incorrect pinout, which can damage the board. Always verify the pin assignments (VIN, VOUT, GND/ADJ) before soldering.

Recommended alternatives

3
LM39300R-3.3 package
LM39300R-3.3

Tak Cheong Electronics (Holdings) Co., Limited

Needs validationlow risk

Performance upgrade with significantly lower dropout voltage while matching other key parameters.

View details

Alternative comparison matrix

Feature / factorLM1085IS-3.3RGLM39300R-3.3AMS1085CM-3.3LM1084R-3.3Compatibility / risk
PackageTO-263-3TO-263-3TO-263-3TO-263-3TO-263-3 — Package matches.; AMS1085CM-3.3: Package matches.; LM1084R-3.3: Package matches.
Voltage1.5V max @ 3A400mV typ @ 3A15V1.5V @ 5A400mV typ @ 3A / 15V / 1.5V @ 5A — Significantly lower dropout voltage is a major performance upgrade.; AMS1085CM-3.3: Maximum input voltage matches.; LM1084R-3.3: Dropout specified at different current. Performance at 3A must be verified from datasheet curves.
Current3A3A3A5A3A / 5A — Output current matches.; AMS1085CM-3.3: Output current matches.; LM1084R-3.3: Higher output current provides more design margin.

Application & sourcing insights

Questions & answers

Verified drop-in options for LM1085IS-3.3RG are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.