L5955 Datasheet, PDF (1/17 Pages) STMicroelectronics – Multiple multifunction voltage regulator for car radio

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