TPS7B6333QPWPRQ1

Features：

1 Features

• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range

– Device HBM ESD Classification Level 2

– Device CDM ESD Classification Level C4B

• Maximum Output Current: 300 mA

• 4-V to 40-V Wide VIN Input-Voltage Range With Up to 45-V Transients

• Fixed 3.3-V and 5-V Outputs

• Maximum Dropout Voltage: 400 mV at 300 mA

• Stable With Output Capacitor in Wide Range of Capacitance (4.7 µF to 500 µF) and ESR (0.001 Ω to 20 Ω)

• Low Quiescent Current (I(Q))

– < 4 µA When EN Is Low (Shutdown Mode)

– 19 µA Typical at Light Loads With WD_EN High (Watchdog Disabled)

• Configurable for Window Watchdog or Standard Watchdog

• Open-to-Closed Window Ratio Configurable as 1:1 or 8:1

• Fully Adjustable Watchdog Period (From 10 ms to 500 ms)

• 9% Accurate Watchdog Period

• Dedicated WD_EN Pin to Control Watchdog ON-OFF

• Fully Adjustable Power-Good Threshold and Power-Good Delay Period

• Low Input-Voltage Tracking to UVLO

• Integrated Fault Protection

– Overload Current-Limit Protection

– Thermal Shutdown

• 16-Pin HTSSOP Package

2 Applications

• Automotive MCU Power Supply

• Body Control Modules (BCM)

• Body Comfort Modules

• EV and HEV Battery Management Systems (BMS)

• Electronic Gear Shifter

• Transmission Control Unit (TCU)

• Electrical Power Steering (EPS)

3 Description

In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. It is necessary for the watchdog to be independent of the microcontroller in a reliable system.

The TPS7B63xx-Q1 device is a family of 300-mA watchdog LDOs designed for an operating voltage up to 40 V, with typical quiescent current of only 19 µA at light load. The devices integrate a programmable function for selecting a window watchdog or standard watchdog, with an external resistor to set the watchdog time within 9% accuracy.

The PG pin on the TPS7B63xx-Q1 devices indicate when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by selecting external components. The devices also feature integrated short-circuit and overcurrent protection. The combination of such features makes these devices particularly flexible and suitable to supply microcontroller in automotive applications.

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