TDM22545D is not a stand-alone DC-DC converter but a dual-phase power stage module: it integrates the two most layout-sensitive parts of a multiphase buck regulator, the smart power stages and the output inductors, and leaves the control loop to an external multiphase PWM controller. Each of the two phases pairs an Infineon OptiMOS™ 6 high-side and low-side MOSFET with an optimized gate driver, then stacks a power inductor directly on top using Infineon's inductor-on-top construction. The result is two complete, independent synchronous-buck power trains that a controller can interleave to feed a single high-current rail.

Co-packaging the switches, drivers, inductors and input decoupling into one 10 x 9 x 5 mm LGA module removes roughly 40% of the board area a discrete two-phase design would occupy, and it isolates the noisy switch node from the motherboard. Because the switch node never reaches the PCB, switching noise is kept off sensitive signals and the parasitic inductance of the node is minimized, which is what lets the module run efficiently at the 600 kHz to 1.2 MHz range its inductors are tuned for, and up to 2 MHz where the application demands the smallest output filter. Each phase carries 70 A continuous under thermal management and supports 160 A peak for load transients.

The module reports what a discrete stage cannot. On-chip current sensing mirrors the MOSFET current and outputs it at 5 uA/A, far more accurate than inductor-DCR or Rds(on) sensing, while an 8 mV/°C analog pin reports die temperature. Protection is built in at the stage: cycle-by-cycle over-current protection with a fault flag, over-temperature protection with thermal shutdown, high-side short detection, VCC under-voltage lockout, and a bootstrap circuit that auto-refreshes its capacitor so a phase can idle without losing gate drive. Pulling a phase enable low drops it into a 32 uA DEEP SLEEP, and Body-Braking™ transient support sinks energy quickly when a load releases.

Note: Values are taken from the Infineon TDM22545D datasheet (V1.0) and the TDM22544D/TDM22545D product brief. The output voltage, current sharing and loop response are governed by the external multiphase controller; confirm every parameter against the latest official documentation before committing a design.

TDM22545D is supplied in an LG-MLGA-72 module measuring 10 mm x 9 mm x 5 mm, an over-moulded land-grid-array outline with 72 lands on the bottom and the two power inductors forming the visible top surface. The 5 mm profile is set by the inductor-on-top stack, which routes heat from the power stages up through the inductor to the top of the module while the LGA lands carry the high phase currents down into the board. The part is lead-free and RoHS compliant (the "X" in the orderable code), rated to moisture-sensitivity level 3 at 260 °C reflow, and screened to ESD HBM Class 2 and CDM Class C3. The orderable TDM22545DXUMA1 ships in tape and reel. Dimensions and the marking layout are shown below.

📄 Download the official Infineon TDM22545D Datasheet (PDF)

The LGA-72 lands group into two mirrored phases plus shared bias and telemetry. The functional signals of TDM22545D are:

• VIN: Power input, 4.25 V to 16 V, feeding both phases. Decouple locally with the lowest-inductance path; the module already integrates input decoupling capacitance.
• VCC: Bias and gate-drive supply for the smart power stages. Decouple close to the lands.
• VOUT1 / VOUT2: The two phase outputs, each taken from its integrated inductor. Tied together at the load to form one interleaved high-current rail.
• PWM1 / PWM2: 3.3 V tri-state PWM control inputs, one per phase, driven by the external multiphase controller. The tri-state level commands high-side on, low-side on, or high-impedance (diode emulation).
• EN1 / EN2: Per-phase enable. Driving an enable low places that phase in 32 uA DEEP SLEEP for light-load phase shedding.
• IMON1 / IMON2: Analog current-monitor outputs at 5 uA/A, reporting each phase current to the controller for current balancing and protection.
• TMON1 / TMON2: Analog temperature outputs at 8 mV/°C for per-phase thermal monitoring and throttling.
• PGND / GND: Power-ground return for the phase currents and the signal-ground reference for the bias and telemetry pins.

The parts below are references across Infineon's dual-phase power-module family and the surrounding system. They are not drop-in replacements; verify current rating, current-sense gain, package and the matching controller before substituting.

Selection Tips: Choose TDM22545D when a core rail needs 70 A per phase with accurate 5 uA/A telemetry; step to TDM22544D where per-phase current and cost are lower; move to a DrMOS such as TDA21570 plus a discrete inductor when board height rules out a 5 mm module. In every case the module pairs with a multiphase controller such as XDPE192C3B, which sets the output voltage and balances the phases.

Infineon Technologies AG, headquartered in Neubiberg near Munich, Germany, is a leading supplier of power semiconductors and power-management solutions. The TDM22xxx OptiMOS™ dual-phase power modules sit within Infineon's power-conversion portfolio for computing and data-center power, building on the OptiMOS™ 6 MOSFET technology and the smart-power-stage (DrMOS) lines.

The dual-phase module family is positioned for "sustainable AI" power delivery: by raising efficiency at the processor core and reducing power-distribution-network loss, large GPU and accelerator deployments save meaningful energy at fleet scale. Infineon offers the matching multiphase digital controllers and single-phase smart power stages, giving a coherent migration path from discrete DrMOS designs to fully integrated module-based core rails.