Texas Instruments TPS40170

Description

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 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 controllersupports 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 via 1% ensured accuracy. Additionally, the controller implements a novel scheme of bi-directional 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 runningswitching frequency.

Features

• 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
• Power Good
• 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 QFN (RGY) Package

Typical applications

• Wide Input Voltage, High-Power Density DC/DC Converters for Industrial
• Wide Input Voltage, High-Power Density DC/DC Converters for Wide Input Voltage, High-Power Density DC/DC Converters for Networking
• POL Modules
• Wide Input Voltage, High-Power Density DC/DC Converters for Telecomm Equipment

More information

• Datasheet
• IC product information