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


Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 60 Vout (Min) (V) 0.6 Vout (Max) (V) 57 Iout (Max) (A) 20 Regulated outputs (#) 1 Number of Phases 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 600 Iq (Typ) (mA) 4.5 Features Adjustable Current Limit, Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO Adjustable Duty cycle (Max) (%) 95 Operating temperature range (C) -40 to 125 Type Controller Rating Automotive Control mode Voltage Mode open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

VQFN (RGY) 20 16 mm² 4.5 x 3.5 open-in-new Find other Buck controllers (external switch)


  • 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 Master
    and Slave 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
open-in-new Find other Buck controllers (external switch)


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 master and other downstream controllers acting as slaves, synchronized to the master in-phase or 180° out-of-phase. Slave controllers can be synchronized to an external clock within ±30% of the free-running switching frequency.

open-in-new Find other Buck controllers (external switch)
Similar products you might be interested in
open-in-new Compare products
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
LM5141-Q1 ACTIVE Wide-Input 2.2MHz Low-Iq Synchronous Buck Controller Low Iq, wide input range synchronous buck controller.

Technical documentation

Design & development

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

Hardware development

document-generic User guide
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 (...)
  • Wide-Input Voltage Range from 4.5V to 60V
  • 600mV Reference Voltage with 1% Accuracy
  • Programmable UVLO and Hysteresis
  • Voltage Mode Control With Voltage Feed Forward
  • Programmable Frequency Between 100 kHz and 600 kHz
  • Low-side FET Sensing Overcurrent Protection and High-side FET Sensing Short-circuit (...)

Design tools & simulation

SLUM141B.ZIP (84 KB) - PSpice Model
SLUM184.TSC (883 KB) - TINA-TI Reference Design
SLUM185.ZIP (76 KB) - TINA-TI Spice Model
SLUM208A.ZIP (152 KB) - PSpice Model
SLUM236.TSC (80 KB) - TINA-TI Reference Design
SLUM237.ZIP (6 KB) - TINA-TI Spice Model

Reference designs

TPS40170 Automotive 5V Preregulator Reference Design
PMP30101 — 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.
document-generic Schematic document-generic User guide
Cranking Simulator Reference Design for Automotive Applications
PMP7233 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGY) 20 View options

Ordering & quality

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. ​​​​​​​​​​​​​​


Engineer It: Leverage TI’s online toolbox to tackle EMI before touching a soldering iron

Everything you ever wanted to know about EMI: A comprehensive training on addressing potential pitfalls with DC/DC switching regulator EMI

Posted: 23-Jan-2018
Duration: 24:13

Related videos