Home Power management DC/DC switching regulators Step-down (buck) regulators Buck controllers (external switch)

Power management

DC/DC buck controllers

Achieve high reliability in high power, thermally-demanding applications

DC/DC step-down (buck) controllers with external FETs give designers the ability to optimize their power supply for even the most challenging requirements. With buck controllers, power-supply designers can reach levels of output power, operating temperature range, and voltage step-down ratios that are simply not possible with converters or power modules.

Search buck controllers by input voltage range

Battery, 3.3 V

Buck controllers that typically take an input voltage from batteries, supercapacitors (2.7 V or higher) or PCI Express connectors (3.3 V).

12 V

Step-down controllers designed to take a nominal 12-V input as commonly found in automotive, server, communication systems or a supercapacitor output found in storage and UPS applications.

19 V, 24 V

Buck controllers intended for industrial and automotive systems with nominal 24-V input rails or PC systems with a nominal 19-V input rail.

48 V

Step-down controllers designed for 48-V input buses found in Industrial, automotive and communications applications.

Multiphase

Multiphase buck controller applications typically involve high-output current, low-output voltage and tight voltage regulation required for ASIC, FPGA, DDR, DSP and CPU core rails.

Power trends

Power management is at the center of enabling the continued integration of electronics in our lives. For decades, TI has been at the forefront of developing new process, packaging and circuit-design technologies to deliver the best power devices for your design. Check out our featured DC/DC buck controllers below, designed to help you address EMI, quiescent current (IQ) and input-voltage transient challenges. 

Buck controllers for low EMI

Mitigating buck converter EMI is a major challenge for many power supply designers. Devices with built-in EMI reduction technologies save design time and headaches and help you comply with difficult standards like CISPR 25 Class-5. Take a look at our portfolio below for some of the latest and best DC/DC step-down controllers for excellent EMI performance. For more help with EMI mitigation, explore our EMI training hub.

LM5143-Q1

3.5-V to 65-V low IQ, dual, 2-phase synchronous buck DC/DC controller with spread spectrum

LM5141

3.8-V to 65-V low IQ, wide input range synchronous buck controller with slew rate control and optional spread spectrum

LM5088

4.5-V to 75-V wide VIN, current mode non-synchronous buck controller with spread spectrum

Buck controllers for low quiescent current (IQ)

DC/DC buck switching regulators with ultra-low standby quiescent current increase light-load efficiency and extend battery life in portable and battery-operated applications. Find some of the lowest IQ devices in our buck controller portfolio below.

LM25141

3.8-V to 45-V wide-input range synchronous buck controller with 35-µA (typ) standby IQ

LM5143-Q1

3.5-V to 65-V low IQ, dual, 2-phase synchronous buck DC-DC controller with 15-µA quiescent current

LM5140-Q1

Wide VIN dual 2.2-MHz low IQ synchronous buck controller with 35-µA standby quiescent current

Buck controllers for wide VIN

Wide VIN devices feature a maximum input voltage of greater than 30 V and are typically deployed in nominal 12-V, 24-V and 48-V systems where high-input voltage transients are common. With their additional headroom, wide input voltage ranges allow you to shrink or eliminate bulky and costly transient suppression circuitry. Explore the entire collection of wide VIN power-supply devices, including DC/DC converters, controllers, modules and LDOs. Explore featured wide VIN buck controllers below.

LM5146-Q1

100-V synchronous buck DC/DC controller with wide-duty cycle range

LM5145

75-V synchronous buck controller with wide-input voltage and duty cycle ranges

LM25141

3.8-V to 42-V low IQ, wide-input range synchronous buck controller