车用系统电源

With the increasing performance of automotive electronic devices, it is becoming essential to increase the current capability and the number of outputs of power supply ICs. To address these needs, Toshiba offers system power supply ICs with an integrated DC/DC converter. The latest addition to our portfolio of system power supply ICs, the TB9045FNG Series, is ideal for power supply applications for electronic power steering systems that require an extremely high level of safety.

系统电源IC（单路输出）

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系统电源IC（多路输出）

越来越多的汽车安全关键系统要求符合ASIL D^[注1]，比如电动助力转向（EPS）和制动系统，ASIL D是ISO 26262功能安全标准中所规定的最高的汽车安全完整性等级。

新IC集成了各种故障检测功能以监测和防止IC自身故障，比如对于电源电路的高压、低压检测和过热检测，另外还集成了一个看门狗定时器以监测外部微机的故障。我们还结合了用于检测故障检测电路中潜在故障的初始诊断电路以保证更高的功能安全性。

注1：ASIL：汽车安全完整性等级

TB9044AFNG Overview

低电压操作（VB：2.7V～），3通道传感器用电源
适用于ASIL D系统的安全机构

降压-升压预调节器
（最小2.7V输入，6V输出，降压模式的集成驱动器，
升压模式的外部驱动器）
5V线性调节器
（400mA，集成驱动器）
5V跟踪调节器
（100mA × 3通道，集成驱动器）
安全机构
- 低电压检测，高电压检测，过电流检测，热关断
- Window看门狗定时器
- 用于初始诊断的BIST
SPI I/F实现了对于安全机构内部状态的读取

绝对最大电压
40V（用于甩负荷）
建议的工作电压
2.7V至18V
工作温度
Ta=-40至125°C
封装：48引脚HTSSOP

This is the block diagram of TB9044FNG System Power Supply IC.

TB9045FNG Series Overview

Low-voltage operation (VB: 2.7V～), 3ch Power Supply for Sensors
Available with an output voltage of 1.1, 1.2 , 1.25 and 1.5 for MCU Core
Safety mechanisms suitable for ASIL D systems

Buck-Boost Pre-Regulator
(Min 2.7 V input, 6 V output, integrated drivers for buck mode,
External Drivers for Boost Mode)
Boost Regulator
Integrated step-down driver and phase compensation filter; 0.8-A current capability Available with an output voltage of 1.1, 1.2 , 1.25 and 1.5
5 V Linear Regulator
(400mA, Integrated Driver)
5 V Tracking Regulators
(100mA × 3 ch, Integrated Driver)
Safety Mechanism
- Low-voltage detection, High-voltage detection, Overcurrent detection, Thermal shutdown
- Window watchdog timer
- BIST for initial diagnosis
SPI I/F enables reading of internal status of safety mechanisms

Absolute Maximum Voltage
40V (for load dump)
Recommended Operating Voltage
2.7V to 18V
Operating Temperature
Ta= -40 to 125°C
Package: 48pin HTSSOP

System block diagram

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系统电源IC（单路输出）

器件型号	功能	输出电压（V）	输出电流（mA）	功率耗散最大值（W）	备注	封装	工作电压	Rel. Level
TB9005FNG	CPU电压稳压器（带有WDT）	5	8	0.68	低消耗电流：90µA（典型值） WDT关闭功能复位检测4.7V/4.2V（可选）需要外部晶体管	SSOP20	6至18V	–
TB9021FNG	CPU电压稳压器（带有WDT）	5	200	2.8	低消耗电流：30µA（典型值） WDT关闭功能复位检测4.7V/4.2V（可选）集成输出晶体管	TSSOP16	6至18V	AEC–Q100 qualified

System Power Supply ICs (DC-DC Converter Power Supply)

Part Number	Functions	Output Voltage Typ. (V)	Output Current (mA)	Input Voltage Max (V)	Power Dissipation Max (W)	Remarks	Package	Supply Voltage (V)	Rel. Level
TB9044AFNG*	CPU voltage regulator DC-DC converter & LDO Watchdog timer On-chip SPI	5 5 5 5	400 100 100 100	40 (1 sec.)	3.84	DC-DC converter Four low-dropout (LDO) regulators Voltage monitor, POR, WDT SPI (error information output) 5-V series power supply (with a 400-mA driver) 5-V tracking power supply (with three 100-mA driver channels)	HTSSOP48	2.7 to 18	AEC-Q100 qualified
TB9045FNG Series TB9045FNG-110 TB9045FNG-120 TB9045FNG-125 TB9045FNG-150	CPU voltage regulator DC-DC converter & LDO Watchdog timer On-chip SPI	1.1/1.2/1.25/1.5 5 5 5 5	800 400 100 100 100	40 (1 sec.)	3.84	2DC-DC converter Four low-dropout (LDO) regulators Voltage monitor, POR, WDT SPI (error information output) 5-V series power supply (with a 400-mA driver) 5-V tracking power supply (with three 100-mA driver channels)	HTSSOP48	2.7 to 18	AEC-Q100 qualified

*：研发中，WDT：看门狗定时器，POR：上电复位

* 本文中涉及到的系统和产品名称可能是相关公司或组织的商标或注册商标。

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