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


Package | PIN: VQFN (RGY) | 20
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $5.32
10-24 $4.79
25-99 $4.47
100-249 $4.01
250-499 $3.74
500-749 $3.26
750-999 $2.82
1000+ $2.76


  • 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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Texas Instruments  TPS40170RGYT

TPS40170 is a full-featured, synchronous PWM buck controller that operates at an inputvoltage 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 withinput voltage feed-forward compensation that enables instant response to input voltage change. Theswitching frequency is programmable from 100 kHz to 600 kHz.

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