TDK-Lambda i3A Series Non-Isolated DC-DC Converters come in 19.1 x 23.4 x 9.6mm size.

Press Release Summary:

TDK-Lambda i3A Series Non-Isolated DC-DC Converters are available in i3A4W008A033V and i3A4W005A150V variants. Units come with 9 to 53Vdc input and can be used with single output 12V, 24V, 36V or 48V AC-DC power supply. Products are suitable for medical, communications, industrial and test and measurement equipment applications. Converters offer output up to 100W or 8A and are operated in a temperature range of -40°C to +125°C. These devices meet UL/CSA 60950-1 and IEC/EN 60950-1 standards.

Original Press Release:

Wide Range Output, 1/32nd Footprint Converters Operate from a 9 to 53Vdc Input

TDK Corporation announces the introduction of the 100W rated TDK-Lambda i3A series of non-isolated DC-DC converters. Capable of operating from an input voltage of 9V to 53V, the step-down converter delivers an output voltage that can be adjustable from 3.3 to 16.5V or 5 to 30V with output currents of up to 8A. The series is designed to be used in a wide range of applications including medical, communications, industrial and test and measurement equipment.

In a 1/32nd brick form factor, measuring 19.1 x 23.4 x 9.6 mm, the converters can be used in conjunction with a single output 12V, 24V, 36V or 48V AC-DC power supply to generate multiple additional regulated outputs, with or without battery back-up.

Operating efficiencies are up to 98%, minimizing power losses to allow the series to operate in harsh ambient temperatures of -40oC to +125oC even with low airflow conditions. The need for external output capacitance is reduced due to an optimized dynamic voltage response, thus reducing board space requirements.

The basic feature models include an output voltage adjustment pin, positive or negative logic remote on-off, remote sense, input under-voltage, over-current and thermal protection. All models are certified to UL/CSA 60950-1, IEC/EN 60950-1 and carry the CE mark for the Low Voltage and RoHS2 Directives.

More information can be obtained at the following TDK-Lambda Americas website,, or by calling 800-LAMBDA-4. Product availability for the i3A converters can be found via the link to TDK-Lambda’s distributor network (see “Check Distributor Stock”) at

Major applications

  • Medical, communications, industrial and test and measurement equipment

Main features and benefits

  • High efficiency (Up to 98%)
  • 9 to 53Vdc input,
  • 3.3 to 16.5V or 5 to 30V output adjustment
  • Up to 100W or 8A output

Major specifications

                                                  Model                                i3A4W008A033V                     i3A4W005A150V

                                    Input voltage range            Vdc                                       9 to 53V

                                    Output voltage range          Vdc            3.3 - 16.5V                                 5 - 30V

                                   Maximum output current        A                     8A                                         4.5A

                                    Maximum output power        W                                           100W

                                             Efficiency                      %                 89 - 96.5%                             95.5 - 98%

                                          Size (L x W x H)            mm                               19.1 x 23.4 x 9.6mm

About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's portfolio includes passive components, such as ceramic, aluminum electrolytic and film capacitors, ferrites and inductors, high-frequency products, and piezo and protection components, as well as sensors and sensor systems and power supplies. These products are marketed under the product brands TDK, EPCOS, Micronas, Tronics and TDK-Lambda. TDK's further main product groups include magnetic application products, energy devices, and flash memory application devices. TDK focuses on demanding markets in the areas of information and communication technology and automotive, industrial and consumer electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2017, TDK posted total sales of USD 10.5 billion and employed about 100,000 people worldwide.

About TDK-Lambda Corporation

TDK-Lambda Corporation, a group company of TDK Corporation, is a leading global power supply company providing highly reliable power supplies for industrial equipment worldwide. TDK-Lambda Corporation meets the various needs of customers with our entire range of activities, from research and development through to manufacturing, sales, and service with bases in five key areas, covering Japan, Europe, America, China, and Asia.

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