3 Description
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.
Device Information(1)
DEVICE NAME |
PACKAGE |
BODY SIZE |
TPS65311-Q1 |
VQFN (56) |
8.00 mm × 8.00 mm |
VQFNP (56) |
8.00 mm × 8.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
4 Revision History
Changes from B Revision (April 2014) to C Revision
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Added the VQFNP (RWE) package option to the data sheet Go
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Added pin descriptions for the S1 and S2 pins in the Pin Functions tableGo
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Deleted the lead temperature (soldering, 10 sec), 260°C parameter from the Absolute Maximum Ratings tableGo
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Changed the Handling Ratings table to ESD Ratings and moved storage temperature back to the Absolute Maximum Ratings tableGo
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Changed all the thermal values for the RWE package in the Thermal Information tableGo
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Added the Receiving Notification of Documentation Updates and Community Resources sectionsGo
Changes from A Revision (October 2013) to B Revision
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Changed CDM ESD Classification Level from C3B to C4B in the Features list and ESD ratings Go
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Added device number to document titleGo
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Added Device Information table to first page and Table of Contents to second page. Moved Revision History to second page alsoGo
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Added two new paragraphs following the first paragraph in the Description section Go
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Deleted simplified block diagram from first page and added new schematic image Go
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Moved the pin diagram and function table to before the electrical specifications and change it to the Pin Configurations and Functions section Go
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Added the word range to the Absolute Maximum RatingsGo
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Moved the electrical specifications tables into the Specifications section Go
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Moved the ESD ratings and storage temperature out of the Absolute Maximum Ratings table and into the Handling Ratings table. Also added the ESD HBM and CDM notesGo
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Changed both max values for TJ from 125 to 150 in the RECOMMEND OPERATING CONDITIONS tableGo
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Lowered all thermal values in the Thermal Information table Go
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Changed condition statement of ELECTRICAL CHARACTERISTICS table from TJ(max) = 125°C to TJ(max) = 150°CGo
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Added test condition for IOUT = 350 mA, TJ = 150°C to the VDropout parameter in the ELECTRICAL CHARACTERISTICS tableGo
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Changed the min value for the VHSSC_HY parameter from 1.5 to 1 and deleted the typ (2.5) and max (3.5) valuesGo
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Moved all timing specifications from the Electrical Characteristics table into the Timing Requirements table and added figure references to the timing diagramGo
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Changed the max value for the tVSSENSE_BLK parameter from 20 to 35Go
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Changed the MAX value for the WD filter time parameter from 0.5 µs to 1.2 µs in the Timing Requirements table Go
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Changed the min value for the tGL-BLK parameter from 10 to 5Go
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Moved all switching characteristics out of the Electrical Characteristics and into the new Switching Characteristics table Go
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Moved all but the first paragraph of the Description into the new Overview section in the Detailed Description sectionGo
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Moved the block diagram into the Detailed Description section Go
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Deleted the Operating Modes table and Normal Mode PWM Operation section title for Buck Controller (BUCK1)Go
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Changed the resistor name for the resistor next to C1 from R1 to R3 and added R1 and R2 to the Detailed Block Diagram of Buck 1 Controller imageGo
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Moved the component selection portion of the Synchronous Buck Converters BUCK2 and BUCK3 section into the Typical Applications section Go
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Moved the component selection portion of the BOOST Converter section into the Typical Applications section Go
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Changed the voltage value that EXTSUP is connected to from 4.6 to 4.8 in the Gate Driver Supply section Go
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Moved the SPI section into a Programming section Go
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Added the Design Parameters tables for each of the Typical Application sectionsGo
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Added the Adjusting the Output Voltage for the BUCK1 Controller section to the Buck Controller (BUCK1) application sectionGo
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Moved the component selection portion of the Buck Controller (BUCK1) section into the Typical Applications section Go
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Changed R1 to R3 in the Compensation of the Buck Controller sectionGo
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Added the Adjusting the Output Voltage for the BUCK2 and BUCK3 Converter to the Detailed Design Procedure in the Synchronous Buck Converters BUCK2 and BUCK3 sectionGo
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Changed the inductance, capacitance and FLC values from 3.3 µH, 20 µF, and 12.9 kHz to 1.5 µH, 39 µF, and 13.7 kHz (respectively) in the For example: section of the Compensation of the BOOST Converter sectionGo
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Added the Linear Regulator application section Go
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Added the Device and Documentation Support and Mechanical, Packaging, and Orderable Information sections. The Device and Documentation Support now includes the electrostatic discharge caution, trademark information, and a link to the TI GlossaryGo
Changes from * Revision (October 2013) to A Revision
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Changed document status from Product Preview to Production DataGo
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Deleted both min values (–44°C and –55°C) for TJ in the RECOMMENDED OPERATING CONDITIONS tableGo
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Changed both max values for TJ from 150°C to 125°C in the RECOMMENDED OPERATING CONDITIONS tableGo
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Changed condition statement of ELECTRICAL CHARACTERISTICS table from TJ temperature range to TJ(max) = 125°CGo
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Changed one test condition for the VDroupout parameter in the ELECTRICAL CHARACTERISTICS table from TJ = 150°C to TJ = 125°CGo
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Deleted the TJ temperature range from SHUTDOWN COMPARATOR subheader row in the ELECTRICAL CHARACTERISTICS tableGo
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Changed one test condition for the IVT_leak parameter in the ELECTRICAL CHARACTERISTICS table from TJ = –20°C to 150°C to TJ = –20°C to 125°CGo
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Changed the TJ temperature range to TJ(max) = 125°C for the INTERNAL VOLTAGE REGULATORS subheader row in the ELECTRICAL CHARACTERISTICS tableGo