TP4059
Nanjing Top Power ASIC Co., Ltd.
Needs validationmedium risk
TP4059 is a close same-vendor charger candidate but needs pinout confirmation.
Best Alternatives to TP4057-42-SOT26-R
TP4057-42-SOT26-R alternatives should be treated as charger candidates, not verified drop-ins. Pinout and input-voltage limits are the main checks.
AI replacement insight
Electrical riskmedium
VIN/current and float voltage must be checked.
Package riskmedium
SOT-23-6 matches on several parts, but pinout is missing.
Firmware risklow
No firmware interface is indicated.
Sourcing riskmedium
Some lifecycles are not listed.
Can it be replaced directly?
No confirmed pin-compatible replacement is supported by the provided fields.
Best replacement path
Review TP4059 first, then 5V-only options such as BL8573CB6TR or ME4055AM6G.
Main risk
Unverified pinout plus lower input-voltage ratings on several candidates.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | TP4057-42-SOT26-R | TP4059 | BL8573CB6TR | ME4055AM6G | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 — same package; BL8573CB6TR: same package; ME4055AM6G: same package; HX4057A: same package |
| Voltage | 4-9V in, 4.2V float | 4-9V in, 4.2V charge | 4.25-6.0V in, 4.2/4.35V | 4.5-6.5V in, 4.2V | 4-9V in, 4.2V charge / 4.25-6.0V in, 4.2/4.35V / 4.5-6.5V in, 4.2V / 4-6V in, 4.2V — range aligns; BL8573CB6TR: 5V-only risk; ME4055AM6G: narrower VIN; HX4057A: low VIN max |
| Current | 500mA prog | 600mA prog | 500mA/1.5A | 800mA | 600mA prog / 500mA/1.5A / 800mA / 500mA max — verify setting; BL8573CB6TR: variant unclear; ME4055AM6G: set current; HX4057A: same max |
| Temperature | -40 to 85C | -40 to 85C | -40 to 85C | -40 to 85C | -40 to 85C — covers target; BL8573CB6TR: covers target; ME4055AM6G: covers target; HX4057A: covers target |
| Pinout | not tabulated | not provided | CHRG/GND/BAT/VCC/STDBY/PROG | not provided | not provided / CHRG/GND/BAT/VCC/STDBY/PROG — must verify; BL8573CB6TR: candidate only; ME4055AM6G: must verify; HX4057A: must verify |
Application & sourcing insights
Questions & answers
TP4059 is the closest listed candidate by same vendor, package, voltage range, and charger role, but it still needs pinout review.