The LM5190-Q1 is an 80V, ultra-low IQ, synchronous buck DC/DC controller with Constant-Current Constant-Voltage (CC-CV) regulation. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The integrated CC-CV operation features a high accuracy for the regulation of both voltage (± 1%) and current (± 4.5%) . The CC-CV operation also provides seamless transition between constant-current and constant-voltage mode. The CC-CV operation effectively reduces the bill of materials (BOM) count and cost for applications that require average output current control. The output current limit is programmable and can be dynamically changed. The LM5190-Q1 has an output current monitor.
The LM5190-Q1 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.
Additional features of the LM5190-Q1 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated dual-input VCC bias supply regulator, internal 2.75ms soft-start time, and thermal shutdown protection with automatic recovery.
The LM5190-Q1 controller comes in a 3.5mm × 4.5mm, thermally enhanced, 19-pin VQFN package with wettable flank pins to facilitate optical inspection during manufacturing.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5190-Q1 80V , Automotive, Synchronous, Buck Controller With Constant Current and Constant Voltage Regulation datasheet | PDF | HTML | 31 Jul 2024 |
| EVM User's guide | LM5190-Q1 CCCV Buck Controller Evaluation Module User's Guide (Rev. A) | PDF | HTML | 20 Nov 2024 | |
| Application note | Controller to Converter – Design Considerations for 24V and 48V Systems | PDF | HTML | 02 Oct 2024 |
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) | 19 | Ultra Librarian |
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.
Welcome to the LM25190/LM5190 synchronous buck controller with CCCV regulation design tool. This stand-alone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM25190/LM5190 synchronous buck DC/DC controller. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.