ProjectsPricingInsights

Best Alternatives to RT9742GGJ5

Package: TSOT-23-5RICHTEKPower Management (PMIC)Input Voltage: 2.7V to 6VOutput Current: 1ASwitch On Resistance: 70mΩNumber of Outputs: 1Operating Temperature: -40°C to 85°C

RT9742GGJ5 replacement review found same-package RT9742 power-switch candidates, but no pin-compatible substitute is proven from the provided fields.

AI replacement insight

Electrical riskmedium

current rating differs; limits may differ

Package risklow

kept parts use TSOT-23-5

Firmware risklow

only flag logic may matter

Sourcing risklow

kept parts are indexed

Can it be replaced directly?

No verified pin-compatible replacement is available from the provided evidence.

Best replacement path

Start with RT9742CGJ5, then verify pinout, enable option, fault flag and limits.

Main risk

Same TSOT-23-5 package does not prove the same pinout or option behavior.

Recommended alternatives

2
RT9742CGJ5 package
RT9742CGJ5

RICHTEK

Needs validationmedium risk

RT9742CGJ5 is a same-series 2A power-switch candidate for RT9742GGJ5.

View details

Alternative comparison matrix

Feature / factorRT9742GGJ5RT9742CGJ5RT9742AGJ5FAlt 3Compatibility / risk
PackageTSOT-23-5,5pTSOT-23-5,5pTSOT-23-5,5pTSOT-23-5,5p — same package count; RT9742AGJ5F: same package count
Pinoutnot providednot providednot providednot provided — must verify pins; RT9742AGJ5F: must verify pins
Voltage2.7V to 6V2.7V to 6V2.7V to 6V2.7V to 6V — same Vin; RT9742AGJ5F: same Vin
Current1A2A3A2A / 3A — higher rating; RT9742AGJ5F: higher rating
Applicationhigh-side switchhigh-side switchhigh-side switchhigh-side switch — same function; RT9742AGJ5F: same function

Application & sourcing insights

Questions & answers

RT9742CGJ5 is the best candidate from the provided data, but it still needs FAE pinout and option-code review.