●The TPS65311-Q1 device is a power-management IC (PMIC), meeting the requirements of digital-signal-processor (DSP) controlled-automotive systems (for example, advanced driver-assistance systems). With the integration of commonly used supply rails and features, the TPS65311-Q1 device significantly reduces board space and system costs.
●The device is capable of providing stable output voltages to the application, including a typical 5-V CAN-supply, from a varying input power supply (such as an automotive car battery) from 4 V to 40 V. The device includes one synchronous buck controller as a pre-regulator that offers flexible output power to the application. For post-regulation, the device includes two synchronous buck and one asynchronous boost converter, working at a switching frequency of 2.45 MHz to allow for a smaller inductor which requires less board space. The two buck converters also offer internal loop compensation which eliminates the need for external compensation components. Furthermore, the device includes a low-noise linear regulator.
●To help support system safety, the device includes voltage monitoring on all supply rails and a window-watchdog to monitor the MCU and DSP. Other features include a high-side driver which drives a warning-lamp LED, a reference voltage which is used as ADC reference in the MCU, DSP, and a shutdown comparator which, in combination with external NTC-resistor, switches off the device at too-low ambient temperature.
● Qualified for Automotive Applications
● AEC-Q100 Test Guidance With the Following Results:
● Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
● Device HBM ESD Classification Level H1B
● Device CDM ESD Classification Level C4B
● Input Voltage Range: 4 V to 40 V, Transients up to 60 V; 80 V When Using External PMOS-FET
● Single-Output Synchronous-Buck Controller
● Peak Gate-Drive Current 0.6 A
● 490-kHz Fixed Switching Frequency
● Pseudo Random Frequency-Hopping Spread Spectrum or Triangular Mode
● Dual-Synchronous Buck Converter
● Designed for Output Currents up to 2 A
● Out of Phase Switching
● Switching Frequency: 2.45 MHz
● Adjustable 350-mA Linear Regulator
● Adjustable Asynchronous-Boost Converter
● 1-A Integrated Switch
● Switching Frequency: 2.45 MHz
● Soft-Start Feature for All Regulator Outputs
● Independent Voltage Monitoring
● Undervoltage (UV) Detection and Overvoltage (OV) Protection
● Short Circuit, Overcurrent, and Thermal Protection on all supply output rails
● Serial-Peripheral Interface (SPI) for Control and Diagnostic
● Integrated Window Watchdog (WD)
● Reference Voltage Output
● High-Side (HS) Driver for Use with External PMOS-FET for driving an LED
● Input for External Temperature Sensor for Shutdown at TA < –40°C
● Thermally Enhanced Packages With Exposed Thermal Pad
● 56-Pin VQFN (RVJ) or 56-Pin VQFNP (RWE)
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