L5955 データシートの表示（PDF） - STMicroelectronics

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L5955

Multiple multifunction voltage regulator for car radio

STMicroelectronics 

L5955

Multiple multifunction voltage regulator for car radio

Features

■ 2 stand-by regulators:

3.3V (125mA)

1.5V (300mA)

■ 6 regulators:

10V (40mA)

8.5V (200mA)

3.3V (850mA)

8/10V (1A)

5/3.3/1.8V (200mA)

1.8/2.5V(200mA)

■ All regulators are low dropout outputs

■ The different outputs voltage are controlled by

I2C Bus.

■ Reg3 on/off controlled by enable

■ Reg1, Reg2, Reg4, Reg5, Reg6 on/off

controlled by I2CBus.

■ 3 high side drivers:

2A (HSD1)

0.45A (HSD2 & HSD3)

■ No external charge pump capacitors are

required

■ Stand-by mode controlled by EN pin for I2C

Bus and Reg1, Reg2, Reg3, Reg4, Reg5,

Reg6, HSD1, HSD2, HSD3

■ LVW function externally selectable

■ Individual thermal shutdown

Flexiwatt27

■ Independent current limiting

■ Short circuit protection

■ Load dump protection and overvoltage

shutdown

Description

The L5955 is an integration of three high side

drivers, six regulators and two stand-by regulators

with RESET function developed to provide the

power to a complete audio system.

The outputs of the IC are controlled by I2C bus

and Enable pin.

The device is equipped with sequencing and slew

rate controls for the st-by regulators.

Table 1.

Device summary

Order code

L5955

Package

Flexiwatt27

Packing

Tube

August 2007

Rev 1

1/17

www.st.com

17

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