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


Package | PIN: RGY | 20
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $5.46
10-24 $4.91
25-99 $4.59
100-249 $4.11
250-499 $3.84
500-749 $3.34
750-999 $2.89
1000+ $2.83


  • 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

Texas Instruments  TPS40170QRGYRQ1

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.