Encapsulated DC/DC power modules deliver PoL for FPGAs, DSPs and ASICs

Renesas Electronics has announced the ISL8274M dual 30A and ZL9024M 33A encapsulated digital DC/DC PMBus power modules, claiming they deliver the highest power density and efficiency in their class.

The dual ISL8274M operates from a 5.0 or 12V power rail, provides two 30A outputs and up to 95.5 per cent peak efficiency in a compact 18 x 23mm2 footprint. The ZL9024M operates from a 3.3V rail and outputs 33A of power in a 17 x19mm2 footprint. They deliver point of load (PoL) conversions for advanced FPGAs, DSPs, ASICs and memory used in servers, telecomms, datacomms, optical networking and storage equipment. Both devices are easy-to-use, PMBus-configurable power supplies that include a controller, MOSFETs, inductor and passives encapsulated inside a module that increases available board space and reduces bill of materials (BoM).

The ISL8274M and ZL9024M digital power modules use Renesas’ patented

ChargeMode control architecture, which provides the highest efficiencies with better than 90 per cent on most conversions. The power modules also provide a single clock cycle fast transient response to output current load steps common in FPGAs and DSPs that process power bursts. The compensation-free design keeps the modules stable regardless of output capacitor changes due to temperature, variation or aging. Eliminating the need for an external discrete compensation network saves board space and additional BoM cost, adds Renesas. The ISL8274M supports input voltages from 4.5 to 14V. The ZL9024M accepts input voltages from 2.75 to 4.0V. Both modules offer adjustable output voltages as low as 0.6V.

The encapsulated modules use Renesas’ proprietary High Density Array (HDA) package, which uses a single-layer conductive substrate to reduce lead inductance and dissipate heat primarily through the system board. The HDA’s copper lead-frame structure allows the modules to operate at full load with no airflow or heatsinks.

The ISL8274M and ZL9024M also provide programmable Vout, soft-start, soft-stop, sequencing, margining and under-voltage, over-voltage, under-current, over-current, under temperature and over-temperature. They also monitor Vin, Vout, Iout, temperature, duty cycle, switching frequency, and faults.


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