TPS65320QPWPRQ1 Datasheet, PDF (1/34 Pages) Texas Instruments – 40-V Step-Down Converter With Eco-mode™ Codec and LDO Regulator

TPS65320-Q1
www.ti.com
SLVSAY9A – DECEMBER 2012 – REVISED APRIL 2013
40-V Step-Down Converter With Eco-mode™ Codec and LDO Regulator
Check for Samples: TPS65320-Q1
FEATURES
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•2 Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following
Results:
– Device Temperature Grade 1: –40°C to
125°C Ambient Operating Temperature
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• One High-VIN Buck Converter
– Input Range of 3.6 V to 40 V
– Asynchronous Buck Converter (Internal
FET)
– Max Load Current 3.2 A, Output
Adjustable 1.1 V to 20 V
– High-Duty-Cycle Operation Supported
– Adjustable Switch-Mode Frequency 100 kHz
to 2.5 MHz
– Less Than 140-µA Standby Current in Low-
Power Mode
• One Low-Dropout Voltage (LDO) Regulator
– 280-mA Current Capability with 40-µA
Standby Current in Low-Load Condition
– Input Supply Auto-Source to Balance
Efficiency and Low Standby Current
– Power-Good Output (Push-Pull)
– Low-Dropout Voltage of 300 mV at I_OUT =
200 mA (Typical)
• Overcurrent Protection for All Regulators
• Overtemperature Protection
• 14-Pin HTSSOP Package With PowerPAD™
Package
APPLICATIONS
• Qualified for Automotive Applications
• Infotainment, Telematics
• TFT Cluster
• Advanced Driver Assistant System
DESCRIPTION
The TPS65320-Q1 power supply is a combination of a single high-voltage switch-mode asynchronous buck
power supply and an LDO regulator. This is a monolithic high-voltage switching regulator with an integrated
switch of 40 V, a power MOSFET, and a low-standby-current LDO. The device has a voltage supervisor which
monitors the outputs of the switch-mode power supply. To reduce heat, the input supply of the LDO can auto-
source from the input voltage to the output of the buck. The low-voltage tracking feature can possibly eliminate
the need to use a boost converter during cold-crank conditions.
The TPS65320-Q1 has a switching frequency range from 100 kHz to 2.5 MHz, providing customers with a
flexible design to fit their system needs. The external loop compensations allow the user to optimize the
converter response for the appropriate operating conditions. The standby current of the buck regulator is 140 µA
for low-power mode.
The device has built-in protection features such as soft start, pulse-by-pulse current limit, thermal sensing, and
shutdown due to excessive power dissipation.
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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.
Eco-mode, PowerPAD are trademarks of Texas Instruments.
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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 © 2012–2013, Texas Instruments Incorporated