Home Power management DC/DC switching regulators Step-down (buck) regulators Buck controllers (external switch)

TPS40170-Q1

ACTIVE

Automotive 4.5V to 60V Synchronous Buck Controller with Voltage Tracking

A newer version of this product is available

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
LM5141-Q1 ACTIVE Automotive wide-input 2.2-MHz low-IQ synchronous buck controller Optional spread spectrum for improved EMI in a smaller package footprint.
LM5148-Q1 ACTIVE Automotive, 80-V synchronous buck DC/DC controller with ultra-low IQ Single output stackable to two phases, smaller footprint, lower IQ, and greater efficiency.

Product details

Vin (min) (V) 4.5 Vin (max) (V) 60 Vout (min) (V) 0.6 Vout (max) (V) 57 Iout (max) (A) 20 Iq (typ) (mA) 4.5 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 600 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Automotive Control mode Voltage mode Type Controller
Vin (min) (V) 4.5 Vin (max) (V) 60 Vout (min) (V) 0.6 Vout (max) (V) 57 Iout (max) (A) 20 Iq (typ) (mA) 4.5 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 600 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Automotive Control mode Voltage mode Type Controller
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • New, similar products available:
    • LM5145-Q1 75-V synchronous buck controller with wide input voltage and duty cycle ranges
    • LM5146-Q1 100-V synchronous buck DC/DC controller with wide duty-cycle range
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 1C
    • Device CDM ESD classification level C4B
  • Wide-input voltage range from 4.5 V to 60 V
  • 600-mV reference voltage with 1% accuracy
  • Programmable UVLO and hysteresis
  • Voltage-mode control with voltage feed-forward
  • Programmable frequency between 100 kHz and 600 kHz
  • Bidirectional frequency synchronization with primary and secondary option
  • Low-side FET sensing overcurrent protection and high-side fet sensing short-circuit protection with integrated thermal compensation
  • Programmable closed-loop soft start
  • Supports pre-biased outputs
  • Thermal shutdown at 165°C with hysteresis
  • Voltage tracking
  • Power good
  • ENABLE with 1-µA low-current shutdown
  • 8-V and 3.3-V LDO output
  • Integrated bootstrap diode
  • 20-pin 4.5-mm × 3.5-mm VQFN (RGY) package
  • New, similar products available:
    • LM5145-Q1 75-V synchronous buck controller with wide input voltage and duty cycle ranges
    • LM5146-Q1 100-V synchronous buck DC/DC controller with wide duty-cycle range
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 1C
    • Device CDM ESD classification level C4B
  • Wide-input voltage range from 4.5 V to 60 V
  • 600-mV reference voltage with 1% accuracy
  • Programmable UVLO and hysteresis
  • Voltage-mode control with voltage feed-forward
  • Programmable frequency between 100 kHz and 600 kHz
  • Bidirectional frequency synchronization with primary and secondary option
  • Low-side FET sensing overcurrent protection and high-side fet sensing short-circuit protection with integrated thermal compensation
  • Programmable closed-loop soft start
  • Supports pre-biased outputs
  • Thermal shutdown at 165°C with hysteresis
  • Voltage tracking
  • Power good
  • ENABLE with 1-µA low-current shutdown
  • 8-V and 3.3-V LDO output
  • Integrated bootstrap diode
  • 20-pin 4.5-mm × 3.5-mm VQFN (RGY) package

The TPS40170-Q1 device is a full-featured, synchronous PWM buck controller that operates at an input voltage between 4.5 V and 60 V and is optimized for high-power-density, high-reliability dc-dc converter applications. The controller implements voltage-mode control with input-voltage feed-forward compensation that enables instant response to an input voltage change. The switching frequency is programmable from 100 kHz to 600 kHz.

The TPS40170-Q1 device has a complete set of system protection and monitoring features such as programmable UVLO, programmable overcurrent protection (OCP) by sensing the low-side FET, selectable short-circuit protection (SCP) by sensing the high-side FET, and thermal shutdown. The ENABLE pin allows for system shutdown in a low-current (1-µA typical) mode. The controller supports pre-biased output, provides an open-drain PGOOD signal, and has closed-loop soft-start, output-voltage tracking, and adaptive dead-time control.

The TPS40170-Q1 device provides accurate output-voltage regulation within 1% accuracy. Additionally, the controller implements a novel scheme of bidirectional synchronization with one controller acting as the primary and other downstream controllers acting as secondaries, synchronized to the primary in-phase or 180° out-of-phase. Secondary controllers can be synchronized to an external clock within ±30% of the free-running switching frequency.

New products (LM5145-Q1 and LM5146-Q1) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.

The TPS40170-Q1 device is a full-featured, synchronous PWM buck controller that operates at an input voltage between 4.5 V and 60 V and is optimized for high-power-density, high-reliability dc-dc converter applications. The controller implements voltage-mode control with input-voltage feed-forward compensation that enables instant response to an input voltage change. The switching frequency is programmable from 100 kHz to 600 kHz.

The TPS40170-Q1 device has a complete set of system protection and monitoring features such as programmable UVLO, programmable overcurrent protection (OCP) by sensing the low-side FET, selectable short-circuit protection (SCP) by sensing the high-side FET, and thermal shutdown. The ENABLE pin allows for system shutdown in a low-current (1-µA typical) mode. The controller supports pre-biased output, provides an open-drain PGOOD signal, and has closed-loop soft-start, output-voltage tracking, and adaptive dead-time control.

The TPS40170-Q1 device provides accurate output-voltage regulation within 1% accuracy. Additionally, the controller implements a novel scheme of bidirectional synchronization with one controller acting as the primary and other downstream controllers acting as secondaries, synchronized to the primary in-phase or 180° out-of-phase. Secondary controllers can be synchronized to an external clock within ±30% of the free-running switching frequency.

New products (LM5145-Q1 and LM5146-Q1) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet TPS40170-Q1 Automotive 4.5-V to 60-V, Wide-Input, Synchronous PWM Buck Controller datasheet (Rev. C) PDF | HTML 03 Nov 2023
Selection guide Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) 15 Apr 2021
White paper An overview of radiated EMI specifications for power supplies 05 Jun 2018
White paper An overview of conducted EMI specifications for power supplies 01 Feb 2018
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 13 Nov 2017
EVM User's guide TPS40170 with NexFETs 24-V Input, 5 V at 10-A Output Synchronous Buck EVM 07 Feb 2014

Design & development

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

Evaluation board

TPS40170EVM-578 — Evaluation Module for TPS40170 Synchronous PWM Buck Controller

The TPS40170EVM-578 evaluation module is a fully assembled and tested circuit for evaluating the TPS40170 Wide Input Synchronous PWM Buck Controller. The TPS40170EVM-578 converts a 10V to 60V input to a 5V output at 6A. The minimum input voltage can be lowered to 6V with a simple UVLO resistor (...)
User guide: PDF
Not available on TI.com
Simulation model

TPS40170 PSpice Average Model (Rev. A)

SLUM208A.ZIP (152 KB) - PSpice Model
Simulation model

TPS40170 PSpice Unencrypted Transient Model (Rev. C)

SLUM141C.ZIP (90 KB) - PSpice Model
Simulation model

TPS40170 TINA-TI Average Reference Design

SLUM236.TSC (80 KB) - TINA-TI Reference Design
Simulation model

TPS40170 TINA-TI Average Spice Model

SLUM237.ZIP (6 KB) - TINA-TI Spice Model
Simulation model

TPS40170 TINA-TI Transient Reference Design

SLUM184.TSC (883 KB) - TINA-TI Reference Design
Simulation model

TPS40170 TINA-TI Transient Spice Model

SLUM185.ZIP (76 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

PMP30101 — TPS40170 Automotive 5V Preregulator Reference Design

This buck converter operates over a 6V - 36V input range and delivers 5V @ 8A. The design is optimized for an average current of 5.5A and peak currents up to 10A. The temperature rise at nominal current is about 20K.
Test report: PDF
Schematic: PDF
Reference designs

PMP7233 — Cranking Simulator Reference Design for Automotive Applications

This design is a cranking simulator which generates three different cranking pulses to test automotive systems up to 50W. A microcontroller sets the output voltage of a synchronous buck in the range of 2-15V accordingly to the programmed curves. Output current is in the range of 3.3-25A. It is a (...)
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RGY) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos