TP4057-42-SOT26-R
Nanjing Top Power ASIC Co., Ltd.
Needs validationhigh risk
TP4057 is a same-package Li-Ion charger candidate with current and input-rating limits.
Best Alternatives to BQ21040DBVR
BQ21040DBVR is a TI single-cell Li-Ion/Li-Pol linear charger in SOT-23-6. Alternatives need careful pinout and protection review.
AI replacement insight
Electrical riskhigh
Input ratings are much lower.
Package riskmedium
SOT-23-6 matches, pinout missing.
Firmware risklow
No digital interface shown.
Sourcing riskmedium
Several catalog alternates exist.
Can it be replaced directly?
No pin-compatible replacement is verified from the provided data.
Best replacement path
ME4055AM6G is the closest catalog candidate, but needs FAE review.
Main risk
Most candidates lack the 30V input rating and NTC evidence.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | BQ21040DBVR | ME4055AM6G | TP4057-42-SOT26-R | TP4059 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 — same package; TP4057-42-SOT26-R: same package; TP4059: same package; BL8573CB6TR: same package |
| Pinout | 6 pins | 6 pins | 6 pins | 6 pins | 6 pins — pin functions missing; TP4057-42-SOT26-R: pin functions missing; TP4059: pin functions missing; BL8573CB6TR: pin functions missing |
| Current | 800 mA | 800 mA | 500 mA | 600 mA | 800 mA / 500 mA / 600 mA / 500mA/1.5A — max current; TP4057-42-SOT26-R: derating needed; TP4059: lower max; BL8573CB6TR: variant unclear |
| Voltage | 30 V max | 4.5-6.5 V | 4-9 V | 4-9 V | 4.5-6.5 V / 4-9 V / 6V in, 4.2/4.35V — no 30V evidence; TP4057-42-SOT26-R: input range lower; TP4059: input limit lower; BL8573CB6TR: option risk |
| Temperature | 0-125C | -40-85C | - | - | -40-85C — high temp gap; BL8573CB6TR: high temp gap |
| Application | OVP, NTC | - | UVLO, reverse | reverse protect | UVLO, reverse / reverse protect — features differ; TP4059: feature gap |
Application & sourcing insights
Questions & answers
ME4055AM6G is the closest listed candidate by package and 800 mA current, but it is not verified as a drop-in.