The LT1305 micropower high power DC/DC converter with low-battery detector provides 2-cell and 3-cell to 5V conversion for EL panel drivers and portable instruments.
The LT1305 is a micropower step‑up DC/DC converter that delivers up to 5 V at 400 mA from a 2 V input. It features a low‑quiescent current of 120 µA, a low‑battery detector, and an internal 2 A switch. The device is supplied in an 8‑lead SOIC package, making it suitable for space‑constrained designs.
The datasheet includes absolute maximum ratings, electrical characteristics, typical performance graphs, pin descriptions, and design recommendations for inductors, capacitors, and diodes. Typical applications such as 2‑cell to 5 V conversion for portable instruments and EL panel drivers are illustrated with schematic examples.
| Input Voltage Range | 1.8 V to 5.5 V |
|---|---|
| Quiescent Current | 120 µA (typ) |
| Maximum Power Dissipation | 500 mW |
| Switch Saturation Voltage (VOSAT) at 1 A | 140 mV – 280 mV |
| Package | 8‑Lead Plastic SOIC |
The LT1305 draws a typical quiescent current of 120 µA, with a maximum of about 200 µA.
The low‑battery detector trips when the LBI pin voltage falls below 1.24 V.
The internal switch can handle up to 2 A; exceeding this causes the current limit to activate.
The LT1305 is supplied in an 8‑lead plastic SOIC package.