1 LT1579 300mA Dual Input Smart Battery Backup Regulator Daisy-Chained Control Outputs
The LT1579 is a dual‑input, single‑output LDO regulator designed for battery‑backup and dual‑battery systems. It provides automatic input switching, reverse‑battery protection, and status flags for power‑management monitoring.
The device is offered in fixed‑output versions (3 V, 3.3 V, 5 V) and an adjustable version (1.5 V‑20 V). It is available in narrow 16‑lead SO/SSOP packages and a limited‑feature SO‑8 package.
| Maximum Output Current | 300 mA |
|---|---|
| Dropout Voltage (300 mA) | 0.4 V |
| Quiescent Current (Normal) | 50 µA |
| Quiescent Current (Shutdown) | 7 µA |
| Fixed Output Voltages | 3 V, 3.3 V, 5 V |
| Adjustable Output Range | 1.5 V to 20 V |
| Reverse‑Battery Protection | Enabled |
| Operating Temperature Range | -65 °C to 150 °C |
The LT1579 can supply up to 300 mA of output current.
The dropout voltage is 0.4 V when delivering 300 mA.
Fixed output versions are offered at 3 V, 3.3 V, and 5 V.
Yes, the device includes reverse‑battery protection circuitry.