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

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FEATURES

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One Low-Dropout Voltage (LDO) Regulator

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280-mA Current Capability with 40-µA

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Qualified for Automotive Applications

Standby Current in Low-Load Condition

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AEC-Q100 Qualified with the Following

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Input Supply Auto-Source to Balance

Results:

Efficiency and Low Standby Current

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Device Temperature Grade 1: –40°C to

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Power-Good Output (Push-Pull)

125°C Ambient Operating Temperature

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Device HBM ESD Classification Level H2

200 mA (Typical)

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Device CDM ESD Classification Level C3B

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Overcurrent Protection for All Regulators

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One High-VIN Buck Converter

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Overtemperature Protection

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Input Range of 3.6 V to 40 V

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14-Pin HTSSOP Package With PowerPAD™

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Asynchronous Buck Converter (Internal

Package

FET)

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Max Load Current 3.2 A, Output

APPLICATIONS

Adjustable 1.1 V to 20 V

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Qualified for Automotive Applications

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High-Duty-Cycle Operation Supported

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Infotainment, Telematics

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Adjustable Switch-Mode Frequency 100 kHz

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TFT Cluster

to 2.5 MHz

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Advanced Driver Assistant System

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Less Than 140-µA Standby Current in Low-

Power Mode

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.

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Eco-mode, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.