The LT1776 is a wide input range, high efficiency Buck (step-down) switching regulator.
The LT1776 is a monolithic buck (step‑down) switching regulator designed for high efficiency over a wide input voltage range. It integrates the oscillator, control and protection circuitry, and can accept up to 60 V input while delivering up to 700 mA peak switch current.
The device operates at a fixed 200 kHz frequency, can be synchronized up to 400 kHz, and consumes only 30 pA in shutdown mode. It is offered in 8‑pin SO and PDIP packages and is suitable for automotive DC/DC converters, cellular phone battery chargers, and IEEE‑1394 step‑down converters.
| Input voltage range | 7.4 V to 40 V |
|---|---|
| Peak switch current | 700 mA |
| Switching frequency | 200 kHz (fixed) |
| Shutdown supply current | 30 pA |
| Package options | 8‑Pin SO and PDIP |
| Operating temperature range | -40 °C to 125 °C |
| Synchronization capability | Up to 400 kHz |
The LT1776 operates at a fixed 200 kHz switching frequency.
The internal switch is rated for a peak current of 700 mA.
In shutdown mode the LT1776 draws only about 30 pA.