This document is about LT1676, which is a wide input range, high efficiency Buck (step-down) switching regulator. The part can accept input voltages as high as 60V and contains an output switch rated at 700mA peak current.
The LT1676 is a wide‑input, high‑efficiency step‑down switching regulator designed for automotive, telecom and other high‑voltage applications. It integrates the oscillator, control and protection circuitry in a single monolithic die and is available in 8‑pin SO and PDIP packages.
The document details electrical characteristics, absolute maximum ratings, pin descriptions, timing diagrams and design guidance such as selecting inductors, diodes and bypass capacitors. Typical application circuits and package dimensions are also included.
| Input voltage range | 7.4 V to 60 V |
|---|---|
| Peak switch current rating | 700 mA |
| Fixed switching frequency | 100 kHz |
| Shutdown supply current | 30 pA |
| Operating temperature range | -40 °C to 125 °C |
| Output switch on‑voltage | 0.54 V to 1.5 V |
| Switch current limit | 0.55 A to 1.0 A |
| Reference voltage | 1.225 V to 1.255 V |
| Switching frequency range | 90 kHz to 110 kHz |
The LT1676 operates from 7.4 V up to 60 V input.
It can handle a peak switch current of 700 mA.
The device is offered in 8‑pin SO and PDIP packages.
In shutdown mode it draws only about 30 pA.