DC/DC buck regulator power modules simplify design

Infineon Technologies AG has expanded its integrated point of load (IPOL) family with two new step-down DC/DC converter modules. These DC/DC buck regulator modules are suited for use in space and thermally-constrained applications, including telecom and datacom applications, servers, and network storage.

The TDM3883 and TDM3885 IPOL power modules are fully integrated single-output buck converters that offer a high-efficiency continuous 3 A/4 A load capability, respectively, and line regulation over a wide input supply range of 4.5 V to 14 V. Both modules feature a low supply current of 10 μA at shutdown, which results in longer battery life for portable applications.

(Source: Infineon Technologies)

The power modules feature integrated inductor and capacitors, which reduce external components and enable simpler designs with higher power density. The integration also delivers improved performance compared to discrete solutions due to the low parasitic values by minimizing the PCB wiring trace needed, said Infineon.

In addition, the small package size offers a solution area savings of 80 percent, according to the company.

Infineon also noted that it “excessively tests the integrated inductor and capacitors in reliability and final test (FT), eliminating the effort of passive components selection and test.”

The modules feature a tight reference voltage V REF tolerance (0.5 V±1.0 percent) and low ripple, contributing to system stability and reliability. They also use an enhanced-stability COT (constant on time) engine with ceramic capacitors without external compensation as well as a forced continuous conduction mode (FCCM) option. Other features include thermally-compensated internal over-current protection (OCP), enhanced light load efficiency with reduced switching frequency and diode emulation mode (DEM), internal soft-start, enable input, pre-bias start-up, thermal shut down, a power-good output, over-voltage protection (OVP), and UVLO.

With ultra-light loads, the modules can enter a low quiescent current mode making the suitable for standby power supplies, said Infineon.

The TDM3883 and TDM3885 integrated buck regulator modules with integrated inductor are available in a PG-LGA-15-1 package (2.7 × 3.1 × 2.3 mm) and a PG-LGA-15-2 package (3.1 × 3.8 × 2.3 mm), respectively.