The LT1316 is a micropower step-up DC/DC converter that operates from an input voltage as low as 1.5V. It features a programmable input current limiting function that allows precise control of peak switch current. The peak switch current can be set to any value between 30mA and 500mA by adjusting one resistor. This is particularly useful for converters operating from high source impedance inputs. The converter utilizes a fixed off-time, variable on-time regulation scheme, resulting in a quiescent current of only 33µA in active mode. Quiescent current decreases to 3µA in shutdown mode with the low-battery detector still active. The LT1316 is suitable for applications such as battery backup, LCD bias, and low-power -48V to 5V/3.3V converters.
The LT1316 micropower DC/DC converter operates from input voltages as low as 1.5 V and provides a programmable peak‑switch current limit. It features a quiescent current of only a few microamps in active mode and a low‑battery detector that remains active in shutdown.
The device is offered in 8‑lead MSOP and SO packages, includes a shutdown pin, and provides detailed electrical characteristics such as a 750 mA maximum switch current, 125 °C junction temperature, and a wide operating temperature range. Typical performance graphs, pin functions, and application examples are included to aid design.
| Maximum Switch Current | 750 mA |
|---|---|
| Quiescent Current (Shutdown) | 3 µA |
| Low‑Battery Detector Range (Shutdown) | 30 mA to 500 mA |
| Maximum Operating Voltage | 12 V |
The LT1316 draws about 3 µA in shutdown mode.
The device can handle up to 750 mA of switch current.
It is offered in 8‑lead MSOP and SO packages.