New Industry Products

Medical and Industrial DC/DC Converters, Synchronous Buck, and Buck-Boost Converters

September 19, 2020 by Alessandro Mascellino

In this month’s converter recap, we take a look at converters from Diodes Incorporated, COSEL, and Texas Instruments.

This recap showcases power MOSFETs products designed for different uses, from Synchronous COT Buck converter to Medical and Industrial 3W DC/DC converters and DC/DC Buck-Boost converters.


Synchronous Constant On-Time Buck Converter from Diodes Incorporated

The AP61100/AP61102 are Tiny 5.5V, 1A, Synchronous COT Buck Converters with a wide input voltage range of 2.3V to 5.5V.

Integrating a 110mΩ high-side power MOSFET and an 80mΩ low-side power MOSFET, the new components can provide high-efficiency step-down DC-DC conversion.


Image used courtesy of Diodes Incorporated.
Image used courtesy of Diodes Incorporated.


These capabilities make them ideal for applications in 5V Distributed Power Bus Supplies, White Goods and Small Home Appliances, for instance.

The new converters can also be set to operate in either Pulse Width Modulation (PWM) regardless of load or Pulse Frequency Modulation (PFM) with up to 89% efficiency at 5mA light load.

Thanks to their adoption of Constant On-Time (COT) control features, the AP61100/AP61102 can minimize the external component count to achieve a fast transient response, easy loop stabilization, and low output voltage ripple.

The new converters by Diodes are already available in a SOT563 package on the company’s website.


Medical and Industrial DC/DC Converters From COSEL

Designed for both medical and industrial applications, COSEL’s MH3 series of DC/DC converters feature a broad range of inputs and outputs.

The new series includes two variants: the single output MHFS series and the dual output MHFW series, for a total of 21 different configurations.


Image used courtesy of COSEL.
Image used courtesy of COSEL.


These accept input voltages ranges of either 4.5 to 18 VDC, 9 to 36 VDC, or 18 to 36 VDC.

All of the new components feature built-in overcurrent protection, with automatic recovery and capability for remote On/Off control.

The MH3 series DC/DC converters intended for industrial applications are built with reinforced isolation to achieve 3k VAC and 4.2k VAC isolation levels. 

To facilitate uses in medical environments, all units in the series are certified to follow the ANSI/AAMI ES60601-1 and EN60601-1 3rd standards, specifying Medical Isolation Grade 2MOOP at 250 VAC.


DC/DC Buck-Boost Converter From Texas Instruments

These new converters from Texas Instruments are among the first in the industry to combine programmable input current limit and integrated dynamic voltage scaling to extend battery life by at least 50%.

Maintaining the industry’s lowest quiescent current (IQ), 75 nA, with 92% efficiency at 10 µA the TPS63900 delivers up to three times more output current than competing devices.


Image used courtesy of Texas Instruments.
Image used courtesy of Texas Instruments.


This translates to help an extended life span of battery-powered industrial and personal electronics applications alike.

The stability of the TPS63900 is also increased by reducing up to 50% of the output voltage ripple caused by load transients.

In other words, the buck-boost converter’s ultra-fast transient response is capable of maintaining low IQ while keeping the internal regulation loop active. 

Want to know more about Texas Instrument’s new buck converter? Here is a link to the TPS63900 product page.

What new power converters have you been interested in lately? Share your thoughts in the comments.