Linear charger provides constant-current and constant-voltage charging for a single-cell lithium-ion battery. Charge current is programmable up to 800 mA with an external resistor, and the fixed float voltage option for this orderable part is 4.2 V. Thermal regulation limits die temperature during high-power or high-ambient operation. The device includes charge status output, C/10 termination, automatic recharge, under-voltage lockout, over-voltage protection, soft start, and a low-current shutdown mode. The lead-free SOT-23-5 package supports operation over a -40 °C to 85 °C range.
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| Battery chemistry | Single-cell lithium-ion |
| Charge topology | Linear constant-current/constant-voltage |
| Programmable charge current | Up to 800mA |
| Float voltage | 4.2 typicalV |
| Float voltage accuracy | ±1% |
| Input supply voltage range | 4.25 to 6.5V |
| Absolute maximum input supply voltage | -0.3 to 10V |
| Operating temperature range | -40 to 85°C |
| Charge termination threshold | C/10 |
| Trickle charge threshold | 2.9 typicalV |
| Trickle charge current with 2 kΩ RPROG | 50 typicalmA |
| Auto recharge battery voltage | 4.05 typicalV |
| Input over-voltage protection threshold | 7 typicalV |
| UVLO threshold | 3.9 typicalV |
| Shutdown supply current | 25 typicalµA |
| Thermal regulation junction temperature | 120 typical°C |
| Package | SOT-23-5 |
| Pins | 5 |
| RoHS | Compliant |
| Lead Free | Yes |
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