The LTC4412 is a low-loss PowerPathTM controller that replaces traditional low-voltage OR’ing diodes, has minimal external components, automatic switching between DC sources, load sharing, low quiescent current, and is suitable for mobile phones, notebook computers, digital cameras, USB peripherals, UPS and other applications.
The LTC4412 is a low‑loss PowerPath controller in a thin 1 mm TSOT‑23 package. It controls an external P‑channel MOSFET to provide near‑ideal diode behavior for power‑source OR’ing, automatic switchover, load sharing and reverse‑battery protection. Typical forward voltage drop is 20 mV and quiescent current is 11 µA.
The document includes absolute maximum ratings, electrical characteristics, pin descriptions, operation modes, MOSFET selection guidelines and recommended bypass capacitor values. It also explains the STAT pin function for detecting auxiliary supplies and the CTL pin for digital control.
| Quiescent Current | 11 µA typical |
|---|---|
| Forward Voltage Drop | ≈20 mV |
| Gate Clamp Voltage (V G(ON)) | 7 V |
The LTC4412 draws about 11 µA of quiescent current.
In forward regulation the voltage drop across the MOSFET is approximately 20 mV.
The open‑drain STAT pin goes low and sinks 10 µA when an auxiliary source is detected.