Multi-phase PMICs offer efficiency in “smallest” footprint, says Renesas Electronics
Three power management ICs (PMICs) from Renesas Electronics are claimed to offer the highest power efficiency and smallest footprint for application processors in smartphones and tablets. The ISL91302B, ISL91301A, and ISL91301B multi-phase PMICs also deliver power to artificial intelligence (AI) processors, FPGAs, and industrial microprocessors, and can power the supply rails in solid state drives (SSDs), optical transceivers, and a range of consumer, industrial and networking devices.
The ISL91302B dual/single output, multi-phase PMIC provides up to 20A of output current and 94 per cent peak efficiency in a 70mm2 package that is more than 40 per cent smaller than competitive PMICs, says Renesas.
The ISL91301A triple output PMIC and ISL91301B quad output PMIC deliver up to 16A of output power with 94 per cent peak efficiency. The programmable PMICs leverage Renesas’ R5 Modulation Technology to provide fast single-cycle transient response, digitally tuned compensation, and high 6.0MHz (maximum) switching frequency during load transients. Power supply designers can design boards with 2.0 x 2.0mm, 1.0mm low profile inductors, small capacitors, and only a few passive components.
Renesas PMICs do not require external compensation components or external dividers to set operating conditions. Each PMIC dynamically changes the number of active phases for optimum efficiency at all output currents. Their low quiescent current, light load efficiency, regulation accuracy, and fast dynamic response extend battery life for mobile devices.
The ISL91302B PMIC is available in three factory configurable options for one or two output rails. The dual-phase configuration supports 10A from each output, the triple-phase configuration supports 15A from one output and 5.0A from the second output and the quad-phase configuration supports 20A from one output. Input supply voltage range is 2.5 to 5.5V with I2C or SPI programmable Vout from 0.3 to 2.0V. The PMIC provides 75-microA quiescent current in discontinuous current mode (DCM). Integrated telemetry ADC senses phase currents, output current, input/output voltages, and die temperature, enable PMIC diagnostics during operation. Protection features include soft-start and fault protection against under-voltage, over-voltage, over-current, over-temperature and short circuit conditions.
The ISL91301A and ISL91301B PMICs are available in two factory-configurable options. The ISL91301A is a dual-phase, three output rail device, configured as 2+1+1 phase. The ISL91301B is a single-phase, four output rail device, configured as 1+1+1+1 phase. Current is 4.0A per phase for 2.8 to 5.5V supply voltage and 3.0A per phase for 2.5 to 5.5V supply voltage. The PMICs have I2C or SPI programmable Vout from 0.3 to 2.0V to provide 62-microA quiescent current in discontinuous current mode. Renesas reports ±0.7 per cent system accuracy for -10 to +85 degree C with remote voltage sensing. The ISL91301A and ISL91301B PMICs have soft-start and fault protection against under-voltage, over-voltage, over-current, over-temperature and short circuit conditions.
The ISL91302B PMIC is available now in a 2.551 x 3.670mm, 54-ball WLCSP package. The ISL91301A triple-output PMIC and ISL91301B quad-output PMIC are available now in 2.551 x 2.87mm, 42-ball WLCSP packages.
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