TPS40170-EP

ACTIVE

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

Product details

Vin (min) (V) 4.5 Vin (max) (V) 60 Iout (max) (A) 20 Operating temperature range (°C) -55 to 125 Control mode Voltage mode Topology Buck Rating HiRel Enhanced Product 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) -55 to 125 Control mode Voltage mode Topology Buck Rating HiRel Enhanced Product 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
  • 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/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 3.5-mm × 4.5-mm QFN (RGY) Package
  • 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/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 3.5-mm × 4.5-mm QFN (RGY) Package

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 an 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 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 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.

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 an 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 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 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.

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Technical documentation

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Type Title Date
* Data sheet 4.5-V to 60-V Wide-Input Synchronous PWM Buck Controller, TPS40170-EP datasheet (Rev. A) 11 Apr 2013
* VID TPS40170-EP VID V6213607 21 Jun 2016
* Radiation & reliability report TPS40170MRGYTEP Reliability Report 06 Sep 2013

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VQFN (RGY) 20 Ultra Librarian

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