TPS65311-Q1 Datasheet, PDF (1/49 Pages) Texas Instruments – High-Voltage Power-Management IC for Automotive Safety Applications

TPS65311-Q1
www.ti.com
SLVSCA6A – OCTOBER 2013 – REVISED OCTOBER 2013
High-Voltage Power-Management IC for Automotive Safety Applications
Check for Samples: TPS65311-Q1
FEATURES
1
•2 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 C3B
• Input Voltage Range: 4 V to 40 V, Transients
up to 60 V; 80 V When Using External P-
channel Metal-Oxide Semiconductor (PMOS)
• 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 Buck Controller, Gate Drive,
Buck Converters, BOOST Converter, and
Linear Regulator Outputs
• Serial-Peripheral Interface (SPI) for Control
and Diagnostic
• Integrated Window Watchdog (WD)
• Reference Voltage Output
• High-Side (HS) Driver for Use with External
Field-Effect Transistor (FET), Light-Emitting
Diode (LED) Driver
• Input for External Temperature Sensor,
Integrated Circuit (IC) Shutdown at T_A < –40°C
• Thermally Enhanced PowerPAD™ Package
– 56-pin VQFN (RVJ)
APPLICATIONS
• Multi-Rail DC Power Distribution Systems
• Safety-Critical Automotive Applications
– Advanced Driver Assistance Systems
DESCRIPTION
The TPS65311-Q1 device is a power-management
unit, meeting the requirements of digital-signal-
processor (DSP) controlled-automotive systems (for
example, Advanced Driver Assistance Systems). With
the integration of commonly used features, the
TPS65311-Q1 device significantly reduces board
space and system costs.
The device includes one high-voltage buck controller
for pre-regulation combined with a two-buck and one-
boost converter for post regulation. A further
integrated low-dropout (LDO) regulator rounds up the
power-supply concept and offers a flexible system
design with five independent-voltage rails. The device
offers a low power state (LPM0 with all rails off) to
reduce current consumption in case the system is
constantly connected to the battery line. All outputs
are protected against overload and over temperature.
An external PMOS protection feature makes the
device capable of sustaining voltage transients up to
80 V. This external PMOS is also used in safety-
critical applications to protect the system in case one
of the rails shows a malfunction (undervoltage,
overvoltage, or overcurrent).
Internal soft-start ensures controlled startup for all
supplies. Each power-supply output has an
adjustable output voltage based on the external
resistor-network settings.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated