This datasheet provides information on the features of the LTC4090/LTC4090-5 USB power managers, including a 2A high voltage Bat-Track buck regulator, programmable total charge time, and an NTC thermistor input.
The LTC4090/LTC4090-5 USB Power Manager provides seamless transition between power sources such as Li‑ion batteries, USB, and 6 V to 36 V supplies (up to 60 V). It includes a 2 A high‑voltage buck regulator with Bat‑Track adaptive output control and an internal ideal diode for low‑loss power path when external supply or USB is absent.
The document lists electrical specifications, absolute maximum ratings, pin configuration, package dimensions, and typical performance curves. It also includes a parts list for related battery chargers and power‑management ICs, and references to application notes for USB‑powered handheld products and automotive accessories.
| High Voltage Input (HVIN) | 12 V |
|---|---|
| Maximum Input Current Limit | 2.4 A |
| Package Size | 3 mm × 6 mm × 0.75 mm, 22‑Pin DFN |
| Operating Temperature Range | 40 °C to 85 °C |
| Maximum USB Charge Current | 2 A |
| Maximum Battery Charge Current | 1.5 A |
It operates from 6 V to 36 V supplies, with a maximum of 60 V.
The device provides a 2 A high‑voltage buck regulator output.
Battery charge current is automatically reduced so that the sum of load current and charge current does not exceed the programmed input current limit.
It is supplied in a 22‑lead plastic DFN package measuring 6 mm × 3 mm.