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 primary and other downstream controllers acting as secondaries, synchronized to the primary in-phase or 180° out-of-phase. Secondary controllers can be synchronized to an external clock within ±30% of the free-running switching frequency.
New products (LM5145-Q1 and LM5146-Q1) offer reduced BOM cost, higher efficiency, and reduced design size among many other features.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TPS40170-Q1 Automotive 4.5-V to 60-V, Wide-Input, Synchronous PWM Buck Controller datasheet (Rev. C) | PDF | HTML | 03 Nov 2023 |
| Selection guide | Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) | 15 Apr 2021 | ||
| White paper | An overview of radiated EMI specifications for power supplies | 05 Jun 2018 | ||
| White paper | An overview of conducted EMI specifications for power supplies | 01 Feb 2018 | ||
| Application brief | Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout | 13 Nov 2017 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RGY) | 20 | Ultra Librarian |
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