TPS40170 4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller |

TPS40170 (ACTIVE) 4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller


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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.


  • 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
  • Bi-directional -Frequency Synchronization With Master/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
  • Powergood
  • ENABLE with 1-µA Low Current Shutdown
  • 8.0-V and 3.3-V LDO Output
  • Integrated Bootstrap Diode
  • 20-Pin 3.5 mm × 4.5 mm VQFN (RGY) Package
  • Create a Custom Design with WEBENCH Tools

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  Min   Max Range
Vin  V 4.5 to 60.0V
Vout  V 0.6 to 50V
Iout  A ≤ 25A
Ambient Temp  °C -40 to 125°C


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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
TPS40170 Order now 4.5     60     0.6     57     20     1     1     100     600     4.5     Enable
Frequency Synchronization
Power Good
Pre-Bias Start-Up
Synchronous Rectification
95     -40 to 125     Catalog     VQFN | 20     Controller     Voltage Mode