This document describes a multiple multifunction voltage regulator for car radio. It features 2 stand-by regulators and 6 regulators, all with low dropout outputs. The different output voltages can be controlled by I2C Bus. The regulator outputs can be controlled by enable and I2C Bus. It also includes high side drivers, thermal shutdown, current limiting, short circuit protection, load dump protection, and overvoltage shutdown.
The L5955 is an integrated circuit designed to provide power for complete audio systems in vehicles. It combines three high-side drivers with six linear regulators and two stand-by regulators into a single Flexiwatt27 package.
All regulator outputs are low dropout types controlled by the I²C bus, allowing flexible voltage selection. The device includes features such as independent current limiting, short circuit protection, load dump protection, and overvoltage shutdown to ensure system reliability.
| Operating temperature range | -40 to 85 °C |
|---|---|
| Stand-by quiescent current (ST-BY1) | 170 pA |
| Enable input threshold voltage | 0.8 V |
| MRST delay time | 20 ms |
| LVWIN input voltage threshold | 1.25 V (nominal) |
The device operates within a temperature range of -40 to 85 °C.
The IC integrates six regulators, two stand-by regulators, and three high-side drivers.
The device is available in a Flexiwatt27 package.