100-V synchronous buck regulator debuts with integrated MOSFETs

Texas Instruments Inc. has expanded its high-voltage point-of-load product line by introducing what it claims is the industry's first 100-V synchronous buck regulator with integrated MOSFETs.

The 600-mA LM5017 is the first in a new family of step-down switching regulators that reduce PCB area and system cost while improving high-voltage reliability in telecommunication, industrial, smart grid and automotive systems. Used in conjunction with the WEBENCH online design tool, the LM5017 simplifies high-voltage DC/DC conversion and speeds the design process, according TI.

The 600-mA LM5017, together with the 300-mA LM5018 and 100-mA LM5019 enables direct point-of-load voltage regulation from input voltages as high as 100-V. This eliminates external transient voltage suppressors or clamps required to achieve reliable operation in high-voltage applications.

Key highlights:

• Wide 9-V to 100-V input voltage range improves system reliability in a variety of designs.
• 600-mA LM5017, 300-mA LM5018 and 100-mA LM5019 are pin compatible and support both non-isolated step-down and isolated power supply applications.
• COT control architecture provides fast transient response and eliminates the need for loop compensation, lowering cost and simplifying design.
• Integrated high-side and low-side N-Channel MOSFETs improve efficiency and eliminate external Schottky diode.
• Integrated high-voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.
• Peak current limit and over temperature detection protect the device from overload. Under voltage threshold and hysteresis can be independently programmed.

Pricing and availability: Volume now from TI and its authorized distributors. The LM5018 and LM5019 will be available in April. Offered in a thermally-enhanced 8-pin LLP package measuring 4-mm by 4-mm, the suggested retail price of the LM5017 is $1.65, the LM5018 is $1.40 and the LM5019 is $1.25 in 1,000-unit quantities. The LM5017 in an 8-pin PSOP package will be available in March.

Datasheet: Click here.