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Automotive 3.6V to 36V, 3.2A buck converter with auto-sourced 280mA LDO regulator

TPS65320D-Q1

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Product details

Parameters

Regulated outputs (#) 2 Vin (Min) (V) 3.6 Vin (Max) (V) 36 Iout (Max) (A) 3.2 Step-down DC/DC controller 0 Step-down DC/DC converter 1 Step-up DC/DC controller 0 Step-up DC/DC converter 0 LDO 1 Iq (Typ) (mA) 0.155 Features Eco-mode, Enable, Over Current Protection, Power Good, Thermal Shutdown, UVLO Fixed Operating temperature range (C) -40 to 125 Rating Automotive Processor name Generic Processor supplier Generic Shutdown current (Typ) (uA) 2 Configurability Hardware configurable open-in-new Find other Multi-channel ICs (PMIC)

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other Multi-channel ICs (PMIC)

Features

  • 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 2
    • Device CDM ESD Classification Level C4B
  • One High-VIN Step-Down DC-DC Converter
    • Input Range of 3.6 V to 36 V
    • 250-mΩ High-Side MOSFET
    • Maximum Load Current 3.2 A, Output Adjustable 1.1 V to 20 V
    • Adjustable Switching Frequency 100 kHz to 2.5 MHz
    • Synchronizes to External Clock
    • High Efficiency at Light Loads With Pulse-Skipping Eco-mode™ Control Scheme
    • Maximum 140-µA Operating Quiescent Current
  • One Low-Dropout Voltage (LDO) Regulator
    • Input Range of 3 V to 20 V, With Auto-Source to Balance Efficiency and Lower Standby Current
    • 280-mA Current Capability With Typical 35-µA Quiescent Current in No-Load Condition
    • Power-Good Output (Push-Pull)
    • Low-Dropout Voltage of 300 mV at
      IO = 200 mA (Typical)
  • Overcurrent Protection for Both Regulators
  • Overtemperature Protection
  • 14-Pin HTSSOP Package With PowerPAD™ Integrated Circuit Package

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Description

The TPS65320D-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V for the buck regulator, and 3 V to
36 V for the LDO regulator. The buck regulator has an integrated high-side MOSFET. The LDO regulator features a low-input supply current of 45-µA typical in no-load, also has an integrated MOSFET with an active-low, push-pull reset output pin. The input supply of the LDO regulator auto-source from the output of the buck regulator when it is in operation. Low-voltage tracking feature enables TPS65320D-Q1 to track the input supply during cold-crank conditions.

The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140 µA.

The device has built-in protection features such as soft start, current-limit, thermal sensing and shutdown due to excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet TPS65320D-Q1 36-V Step-Down Converter With Eco-mode™ and LDO Regulator datasheet Nov. 29, 2017
Application notes Low Quiescent Current With Asynchronous Buck-Converters at High Temperatures Jul. 20, 2016
Application notes Interfacing TPS57xxx-Q1 and TPS65320-Q1 Family Devices With Low Impendence Exter Dec. 08, 2015
User guides TPS65321EVM (HVL125A) User's Guide (Rev. A) Nov. 02, 2015
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description
The Texas Instruments TPS65320C-EVM evaluation module (EVM) helps designers evaluate the operation and performance of the TPS65320C-Q1, a switch-mode DC to DC step-down converter with an integrated low-dropout voltage regulator (LDO).
Features

 

  • High VIN Buck Converter
  • Input Voltage Range: 3.6V to 36V
  • Adjustable Buck Converter 3.2A
  • Adjustable Switching Frequency 100kHz to 2.5MHz
  • Adjustable Linear Regulator, 280mA

 

Design tools & simulation

SIMULATION MODELS Download
SLVM737.ZIP (77 KB) - PSpice Model
SIMULATION MODELS Download
SLVM771.ZIP (61 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLVM892A.ZIP (38 KB) - PSpice Model
SIMULATION MODELS Download
SLVM906.ZIP (8 KB) - TINA-TI Spice Model
CALCULATION TOOLS Download
SLYU011.ZIP (284 KB)

Reference designs

REFERENCE DESIGNS Download
Uncompressed Digital Video SerDes over Coax for Automotive Mega Pixel CMOS Camera Reference Design
TIDA-00133 The TIDA-00133 reference design is a high speed serial video interface to connect a remote automotive camera module to a display or machine vision processing system. It uses TIs FPD-Link III SerDes technology to transmit uncompressed MegaPixel video data, bidirectional control signals and power (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Digitally Controlled Boost Power Supply
TIDA-00282 This TI reference design is an automotive voltage boost converter module. The purpose of this module is to supply a steady voltage to vehicle electronics by boosting during voltage droop events such as engine crank. The design is based on the C2000 Real-Time Microcontroller, and will provide up to (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Cluster Wide Vin Power Supply Design
TIDA-00275 This TI reference design is an automotive cluster wide Vin power supply solution that includes a wide Vin buck converter with an integrated LDO.   Also includes a highly efficient synchronous step-down, dc-dc converter. Along with a linear regulator designed to meet JEDEC SSTL-2 and JEDEC (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Brushed Motor Driver for Flip-up Displays
TIDA-00141 This TIDA-00141 reference design provides a quick setup guide for a push-to-open/push-to-close motor drive system that enables the actuation of a flip up display for infotainment systems. This solution also demonstrates two methods of feedback: one using limit switches and the other taking advantage (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options

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