Product details


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  • 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 Converter
    • 3.6- to 40-V Input Range
    • 250-mΩ High-Side MOSFET
      • 3.2-A Maximum Load Current, 1.1- to 20-V Output Adjustable
    • 100-kHz to 2.5-MHz Adjustable Switch-Mode Frequency
    • Less Than 140-µA Operating Quiescent Current
  • One Low-Dropout Voltage Regulator (LDO)
    • 280-mA Current Capability With 28-μA (Typical) Operating Quiescent Current in No-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 IOUT = 200 mA (Typical)
  • Overcurrent Protection for Both Regulators
  • Overtemperature Protection
  • 14-Pin HTSSOP Package With PowerPAD Package

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The TPS65320-Q1 device is a combination of a 40-V, 3.2-A, DC-DC step-down converter and a low-dropout (LDO) regulator. The DC-DC step-down converter, referred to as the buck regulator, has an integrated high-side MOSFET. The LDO regulator also has an integrated MOSFET and a low-input supply current of 28-μA (typical) in a no-load condition. Furthermore, the LDO regulator has an active-low, push-pull reset output pin. To reduce heat, the input supply of the LDO regulator can auto-source from the input voltage to the output of the buck regulator. The low-voltage tracking feature can eliminate the need to use a boost converter during cold-crank conditions.

The buck regulator has a switching frequency range from 100 kHz to 2.5 MHz that provides a flexible design to fix system requirements. The external loop compensation 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 less than 140 μA.

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

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Technical documentation

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No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet TPS65320-Q1 40-V Step-Down Converter With Eco-mode and LDO Regulator datasheet (Rev. F) Mar. 07, 2016
Application notes Low Quiescent Current With Asynchronous Buck-Converters at High Temperatures Jul. 20, 2016
Application notes TPS65320C-Q1 Auto-Source Feature Jul. 11, 2016
Technical articles How a Wide VIN integrated buck and LDO can power your automotive system – part 1 Jun. 10, 2016
Application notes TPS65320-Q1 and TPS65320C-Q1 Design Checklist (Rev. B) Apr. 13, 2016
Application notes Interfacing TPS57xxx-Q1 and TPS65320-Q1 Family Devices With Low Impendence Exter Dec. 08, 2015
User guides TPS65320EVM User's Guide (Rev. A) Aug. 18, 2015
Application notes CISPR25 Radiated Emissions Using TPS65320-Q1 (Rev. A) Jun. 03, 2015
White papers Power Management IC (PMIC) Guide for Automotive (Rev. A) Oct. 29, 2014
Technical articles Don’t underestimate the power of an LDO Oct. 19, 2013
Technical articles How to optimize your DSP power budget Oct. 03, 2013
Technical articles "X" Marks the spot - 7 Treasures in a pirate engineer's treasure chest Sep. 19, 2013

Design & development

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Hardware development

document-generic User guide
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).


  • 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

SLVM737.ZIP (77 KB) - PSpice Model
SLVM770.TSC (583 KB) - TINA-TI Reference Design
SLVM771.ZIP (61 KB) - TINA-TI Spice Model
SLVM892A.ZIP (38 KB) - PSpice Model
SLVM905.TSC (686 KB) - TINA-TI Reference Design
SLVM906.ZIP (8 KB) - TINA-TI Spice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLYU011.ZIP (284 KB)

CAD/CAE symbols

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HTSSOP (PWP) 14 View options

Ordering & quality

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