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TPS40170

ACTIVE

4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller

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Data sheet

A newer version of this product is available

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Same functionality with different pin-out to the compared device
LM5141 ACTIVE Low Iq, Wide Input Range Synchronous Buck Controller Optional spread spectrum for improved EMI in a smaller package footprint.
LM5148 ACTIVE 3.5-V to 80-V, current mode synchronous buck controller Single output stackable to two phases, smaller footprint, lower IQ, and greater efficiency.

TPS40170

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 60 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 57 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Iq (typ) (µA) 4500 Duty cycle (max) (%) 95 Number of phases 1
Vin (min) (V) 4.5 Vin (max) (V) 60 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 57 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Iq (typ) (µA) 4500 Duty cycle (max) (%) 95 Number of phases 1
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • New, similar products available:
    • LM5145 75-V synchronous buck controller with wide input voltage and duty cycle ranges
    • LM5146 100-V synchronous buck DC/DC controller with wide duty-cycle range
  • Wide input voltage range from 4.5 V to 60 V
  • Reference voltage of 600 mV with 1% accuracy
  • Programmable UVLO and hysteresis
  • Voltage mode control with voltage feed forward
  • Programmable frequency between 100 kHz and 600 kHz
  • Bi-directional -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
  • LDO output of 8.0 V and 3.3 V
  • Integrated Bootstrap Diode
  • 20-Pin 3.5 mm × 4.5 mm VQFN (RGY) package
  • Create a Custom Design with WEBENCH Tools
  • New, similar products available:
    • LM5145 75-V synchronous buck controller with wide input voltage and duty cycle ranges
    • LM5146 100-V synchronous buck DC/DC controller with wide duty-cycle range
  • Wide input voltage range from 4.5 V to 60 V
  • Reference voltage of 600 mV with 1% accuracy
  • Programmable UVLO and hysteresis
  • Voltage mode control with voltage feed forward
  • Programmable frequency between 100 kHz and 600 kHz
  • Bi-directional -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
  • LDO output of 8.0 V and 3.3 V
  • Integrated Bootstrap Diode
  • 20-Pin 3.5 mm × 4.5 mm VQFN (RGY) package
  • Create a Custom Design with WEBENCH Tools

TPS40170 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 input voltage change. The switching frequency is programmable from 100 kHz to 600 kHz.

The TPS40170 has a complete set of system protection and monitoring features such as programmable undervoltage lockout (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.

TPS40170 provides accurate output voltage regulation through 1% ensured accuracy. Additionally, the controller implements a novel scheme of bi-directional 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 and LM5146) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.

TPS40170 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 input voltage change. The switching frequency is programmable from 100 kHz to 600 kHz.

The TPS40170 has a complete set of system protection and monitoring features such as programmable undervoltage lockout (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.

TPS40170 provides accurate output voltage regulation through 1% ensured accuracy. Additionally, the controller implements a novel scheme of bi-directional 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 and LM5146) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.

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Technical documentation

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Type Title Date
* Data sheet TPS40170 4.5-V to 60-V, Wide-Input Synchronous PWM Buck Controller datasheet (Rev. C) PDF | HTML 03 Nov 2023
Analog Design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML 29 Aug 2023
Analog Design Journal Implementation of micro-processor controlled wide-input-voltage, smart battery 01 Sep 2019
Application note Wide-Vin Battery-Charger Using SMBus MSP430 MCUs and bq Fuel Gauges (Rev. B) PDF | HTML 12 Jul 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
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
Technical article Optimizing layout for synchronous buck converters PDF | HTML 25 Nov 2016
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 Jul 2016
Technical article Power Tips: Simple PSRR measurement with a frequency analyzer PDF | HTML 25 May 2016
Technical article GaN to the rescue! Part 2: Measurements PDF | HTML 07 Jan 2016
Technical article GaN to the rescue! Part 1: Body-diode reverse recovery PDF | HTML 28 Oct 2015
White paper Choosing the Right Fixed Frequency Buck Regulator Control Strategy 02 Oct 2015
White paper Choosing the Right Fixed Frequency Buck Regulator Control Strategy (PPT) 02 Oct 2015
EVM User's guide TPS40170 with NexFETs 24-V Input, 5 V at 10-A Output Synchronous Buck EVM 07 Feb 2014
Application note Creating a Dual USB Universal Car Charger From the TPS40170 and Two TPS2511 22 May 2012
EVM User's guide Using the TPS40170EVM-578 Evaluation Module 24 Jan 2011

Design & development

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

Evaluation board

AUTOCRANKSIM-EVM — Simulator for automotive cranking pulses evaluation module

The Cranking simulator generates preprogrammed cranking pulses, resembling typical pulse as seen on Car-Battery during cranking (e.g. during start-stop operation). Other pulses can be configured via source-code change, which makes it applicable for any supply-voltage profile in the range of 2.18V.

(...)

User guide: PDF
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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
Evaluation board

TPS40170EVM-597 — Evaluation Module TPS40170 Synchronous PWM Buck Controller with NexFET™

The TPS40170EVM-597 is a fully assembled and tested circuit for evaluating the TPS40170 synchronous step-down controller with two NexFET devices CSD18537NQ5A and CSD18563Q5A. The TPS40170EVM-597 operates from a 10V to 36V input (24V nominal) and provides a 5V output up to 10A.

User guide: PDF
Not available on TI.com
Simulation model

TPS40170 IBIS Model

SLPM333.ZIP (37 KB) - IBIS Model
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Simulation model

TPS40170 PSpice Average Model (Rev. A)

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

TPS40170 PSpice Unencrypted Transient Model (Rev. C)

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

TPS40170 TINA-TI Average Reference Design

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

TPS40170 TINA-TI Average Spice Model

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

TPS40170 TINA-TI Transient Reference Design

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

TPS40170 TINA-TI Transient Spice Model

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

SLUC263 — Type III Compensation Calculation Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
TPS40007 — 2.25V-5.5V, 300 kHz, Synchronous Buck Controller, Source/ Sink, Prebias Operation TPS40009 — 2.25V-5.5V, 600 kHz, Synchronous Buck Controller, Source/ Sink, Prebias Operation TPS40021 — Enhanced Low Input (2.25V-5.5V) up to 1MHz Frequency, Sync. Buck Controller, source/sink TPS40040 — 2.25 to 5.5 V input, 300 kHz, synchronous buck controller with low pin count TPS40041 — 2.25 to 5.5 V input, 600 kHz, synchronous buck controller with low pin count TPS40055 — Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink TPS40057 — Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink with prebias TPS40075 — 4.5-V to 28-V, synchronous buck controller with voltage feed forward TPS40077 — 4.5-V to 28-V, synchronous buck controller with voltage feed forward in HTSSOP package TPS40101 — 4.5-V to 18-V, synchronous buck controller with advanced sequencing and output margining TPS40170 — 4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller TPS40190 — 4.5-V to 15-V, 20-A synchronous buck controller TPS40192 — 4.5-V to 18-V, 20-A, 600-kHz synchronous buck controller with power good TPS40193 — 4.5-V to 18-V, 20-A, 300-kHz synchronous buck controller with power good TPS40195 — 4.5-V to 20-V, 20-A, synchronous buck controller with power good and synchronization TPS40200 — Wide Input Non-Synchronous Buck DC/DC Controller TPS40303 — 3-V to 20-V, 25-A, 300-kHz synchronous buck controller with FSS TPS40304 — 3-V to 20-V, 25-A, 600-kHz synchronous buck controller with FSS TPS40305 — 3-V to 20-V, 25-A, 1.2-MHz synchronous buck controller with FSS TPS40322 — Dual Output or Two-phase Synchronous Buck Controller TPS40400 — 3-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry TPS40422 — Dual Output or Multiphase Synchronous Buck Controller with PMBus TPS5130 — 4.5-V to 28-V, triple synchronous buck controller with LDO controller
AC/DC & DC/DC converters (integrated FET)
TPS53311 — 2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM TPS53313 — 4.5-V to 16-V, 6-A synchronous buck converter with optimized light load efficiency TPS53316 — High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher TPS56121 — 4.5-V to 14-V, 15-A synchronous SWIFT™ buck converter TPS56221 — 4.5-V to 14-V, 25-A synchronous SWIFT™ buck converter
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Reference designs

PMP15025 — 24V to 5V@4A Reference Design for Industrial Robots and Motor Drives

The PMP15025 comprises a single phase synchronous buck converter that supplies a stable 5V @ 4A solution from a 24V input. The design features high efficiency and power density, which are suitable for industrial automation applications, such as robotics and motor drives.
Test report: PDF
Schematic: PDF
Reference designs

PMP10799 — 24V Input Synchronous Buck to 12V at 8A Converter Reference Design

This synchronous buck converter operates over a 19-V to 32-V input range and delivers 12 V at 8-A continuous. It achieves an efficiency of greater than 97% between 4.5 A to 8 A at 24 Vin. Other features include low-output ripple voltage, excellent transient response, and small size.
Test report: PDF
Schematic: PDF
Reference designs

PMP9668 — Universal uP Controlled Battery Charger 24Vin 10 Aout max, 5/12V 2A & 5V 4A, 2 USB Ports Ref Design

BQ24745 is a host controlled synchronous buck battery charger capable of charging batteries at up to 19.2V and up to 8 A normally, extended to 10 A with use of 8 mOhm battery sense resistor. The power train is capable of 8 A with convection only cooling and 10 A with moderate fan cooling (~200 (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP11494 — 48V Input Synchronous Buck to 24V@12A (15A pk) Converter Reference Design

This synchronous buck converter operates over a 45V - 51V input range and delivers 24V @ 12A continuous (15A peak, 1 second). This converter is very efficient; achieving greater than 98% between 5.5A - 15A. The high efficiency helps reduce component temperature rise, improving operational life. (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VQFN (RGY) 20 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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