ST 拥有大量汽车系统功放和稳压器产品组合，用于前窗显示单元、外置放大器和信息娱乐解决方案。 ST 单片式电源管理 IC 为车载音频系统提供线性和开关电源。 器件分为带或不带 I2C 及各种附加功能的不同产品，如诊断功能、传统电池管理功能等。 由于采用先进的混合 IC 技术，这些 IC 可与汽车环境兼容，满足其牢固、保护和功耗方面的严格要求。

L4953G
Description
The L4953G contains a triple voltage regulator and a power switch.
The IC includes a monitoring circuit to warn if a low voltage or no voltage condition is occuring.
In stand-by output is active as long as possible even when in thermal shutdown or any other fault conditions.
The STCAP pin allows the use of a reserve supply capacitor that will hold enough energy for the 5V Stand-by line to allow the μP to store data.

Key Features
3 OUTPUTS:
9.2V (500mA);
5V (1A);
5V (100mA) STANDBY
OUT1 (9.2V) AND OUT2 (5V) WITH INDEPENDENT ENABLE CONTROL FOR STANDBY MODE
2A HIGH SIDE DRIVER WITH CLAMPED OUTPUT (16V)
LOGIC OUTPUT FOR:
SUPPLY UNDERVOLTAGE (LVW)
OVERVOLTAGE (FAULT)
THERMAL PROTECTION (FAULT)
RESET FUNCTION
IGNITION COMPARATOR
REVERSE BATTERY AND LOAD DUMP PROTECTION
THERMAL SHUTDOWN

L4954
Description
L4954 is a quad output voltage regulator and a three output high side driver.
The IC includes monitoring circuitry to warn the microprocessor of a low voltage condition: the LVWarn, output, sensing the slow dropping of STCAP pins voltage, gives the microprocessor time to store data.
A reset output is generated at REG4’s decay.
External protection must be provided for reverse battery protection.

Key Features
4 regulators:
10 V (40 mA) low dropout
8.5 V (175 mA)
5 V (650 mA)
5 V (100 mA) standby
3 high side drivers:
2 A (HSD1)
0.3 A (HSD2 & HSD3)
No external charge pump capacitors are required
Standby mode controlled by 3 input pins:
EN1 for REG1, REG2, REG3 and HSD1
EN2 for HSD2
EN3 for HSD3
Individual thermal shutdown
Logic outputs for supply undervoltage:
LVWARN
Reset
Independent current limiting
Overvoltage shutdown
Short circuit protection
Load dump protection and overvoltage
Shutdown

L5950
Description
The ASPM (Audio System Power Module) is an integration of three high side drivers and five regulators developed to provide the power for an audio system.
The outputs of the IC are controlled via the I2C bus and the Enable input.
External protection must be provided for reverse battery protection.

Key Features
5 REGULATORS
10V (350mA); 8.5V (175mA); 5V (350mA); 5V (250mA); 8V/10V (1A)
ALL REGULATORS ARE LOW DROPOUT OUPUTS
3 HIGH SIDE DRIVERS:
2A (HSD1), 0.45A (HSD2 & HSD3)
NO EXTERNAL CHARGE PUMP CAPACITORS ARE REQUIRED
STAND BY MODE CONTROLLED BY 3 INPUT PINS:
ENABLE FOR REG2 AND REG3,
I2C BUS FOR REG1, REG4, REG5, HSD1, HSD2, HSD3
INDIVIDUAL THERMAL SHUTDOWN
INDEPENDENT CURRENT LIMITING
SHORT CIRCUIT PROTECTION
LOAD DUMP PROTECTION AND OVERVOLTAGE SHUTDOWN
ESD PROTECTED