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TPS3306-Q1

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具有电源故障监视功能的汽车类双处理器监控器

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TPS3306-Q1

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Number of supplies monitored 3 Threshold voltage 1 (typ) (V) 1.4, 1.68, 2.93, 4.55 Features PFI/PFO, Timeout watchdog, Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 4 Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Open-drain Time delay (ms) 100 Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 6 Rating Automotive Watchdog timer WDI (s) 0.8 Operating temperature range (°C) -40 to 125
Number of supplies monitored 3 Threshold voltage 1 (typ) (V) 1.4, 1.68, 2.93, 4.55 Features PFI/PFO, Timeout watchdog, Undervoltage monitor only, Watchdog timer Reset threshold accuracy (%) 4 Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Open-drain Time delay (ms) 100 Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 6 Rating Automotive Watchdog timer WDI (s) 0.8 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Qualified for Automotive Applications
  • Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Watchdog Timer With 0.8-s Time-Out
  • Power-On Reset Generator With Integrated 100-ms Delay Time
  • Open-Drain Reset and Power-Fail Output
  • Supply Current of 15 µA (Typ)
  • Supply Voltage Range . . . 2.7 V to 6 V
  • Defined RESET Output From VDD ≥ 1.1 V
  • SO-8 Package
  • Temperature Range . . . –40°C to 125°C
  • Applications Include
    • Multivoltage DSPs and Processors
    • Portable Battery-Powered Equipment
    • Embedded Control Systems
    • Intelligent Instruments
    • Automotive Systems
  • Qualified for Automotive Applications
  • Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Watchdog Timer With 0.8-s Time-Out
  • Power-On Reset Generator With Integrated 100-ms Delay Time
  • Open-Drain Reset and Power-Fail Output
  • Supply Current of 15 µA (Typ)
  • Supply Voltage Range . . . 2.7 V to 6 V
  • Defined RESET Output From VDD ≥ 1.1 V
  • SO-8 Package
  • Temperature Range . . . –40°C to 125°C
  • Applications Include
    • Multivoltage DSPs and Processors
    • Portable Battery-Powered Equipment
    • Embedded Control Systems
    • Intelligent Instruments
    • Automotive Systems

The TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply voltages, primarily in DSP and processor-based systems.

The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of 3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V.

The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following supply-voltage monitoring table.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again.

The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply.

The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog.

The TPS3306-xx devices are available in standard 8-pin SO packages.

The TPS3306-xxQ family is characterized for operation over a temperature range of –40°C to 125°C.

The TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply voltages, primarily in DSP and processor-based systems.

The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of 3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V.

The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following supply-voltage monitoring table.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again.

The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply.

The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog.

The TPS3306-xx devices are available in standard 8-pin SO packages.

The TPS3306-xxQ family is characterized for operation over a temperature range of –40°C to 125°C.
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* 数据表 Dual Processor Supervisory Circuits With Power-Fail 数据表 (Rev. B) 2008年 4月 30日

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参考设计

TIDA-01168 — 适用于 12V/48V 汽车系统的双向直流/直流转换器参考设计

TIDA-01168 参考设计是一款四相、双向直流/直流转换器开发平台，适用于 12V/48V 汽车系统。此系统使用两个 LM5170-Q1 电流控制器和一个 TMS320F28027F 微控制器 (MCU) 进行功率级控制。LM5170-Q1 子系统使用平均电流反馈进行电流控制，而 C2000™ 微控制器则提供电压反馈。这种控制机制不再需要多相位转化器通常需要进行的相电流平衡。基于 LM5170-Q1 的系统可实现高级别集成，减小印刷电路板 (PCB) 面积、简化设计并加速开发。
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  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
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