The LTC3576/LTC3576-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They each include a high efficiency power path manager with overvoltage protection and three-level step-down regulators.
The LTC3576/LTC3576-1 is a highly integrated power‑management IC that combines a bidirectional PowerPath™ manager, Li‑ion/polymer battery charger, ideal diode, and three programmable step‑down regulators. It supports USB On‑the‑Go, providing a 5 V output at up to 500 mA, and includes Bat‑Track adaptive charging for efficient power delivery.
The device is offered in a 38‑lead plastic QFN package (4 mm × 6 mm × 0.75 mm) and operates over a wide input range (4.35‑5.5 V typical, up to 38 V with external regulator). Electrical characteristics such as input current, over‑voltage protection thresholds, and charger float voltages are specified in the datasheet, along with typical performance curves and recommended application circuits for automotive and fire‑wire battery‑charging solutions.
| Input Supply Voltage (Veus) | 4.35 V – 5.5 V |
|---|---|
| Low Power Suspend Mode Current | 0.32 mA – 0.5 mA |
| Overvoltage Protection Threshold | 6.35 V – 6.7 V (with 6.2 kΩ series resistor) |
| Battery Float Voltage (LTC3576) | 4.179 V – 4.221 V |
| Package | 38‑lead plastic QFN (4 mm × 6 mm) |
The device can generate a 5 V output at up to 500 mA for USB On‑the‑Go applications.
It is supplied in a 38‑lead plastic QFN package measuring 4 mm × 6 mm × 0.75 mm.
The LTC3576/LTC3576-1 can operate with input voltages up to 38 V when used with an external high‑voltage switching regulator.