Renesas Electronics Introduces ISL91302B, ISL91301A, and ISL91301B Multiphase PMICs with Highest Efficiency and Smallest Footprint

ISL91302B Delivers up to 20 A and 94 Percent Peak Efficiency in 70 mm² Solution Size for Application Processors, AI Processors, Industrial MPUs, and FPGAs

Renesas Electronics Corporation announced three programmable power management ICs (PMICs) that offer the highest power efficiency and smallest footprint for application processors in smartphones and tablets: the ISL91302B, ISL91301A, and ISL91301B PMICs. The PMICs also deliver power to artificial intelligence (AI) processors, FPGAs, and industrial microprocessors (MPUs), and they are ideal for powering the supply rails in solid-state drives (SSDs), optical transceivers, and a wide range of consumer, industrial and networking devices. The ISL91302B dual/single output, multiphase PMIC provides up to 20 A of output current and 94 percent peak efficiency in a 70 mm² solution size that is more than 40 percent smaller than competitive PMICs.

In addition to the ISL91302B, Renesas’ ISL91301A triple output PMIC and ISL91301B quad output PMIC both deliver up to 16 A of output power with 94 percent peak efficiency. The new programmable PMICs leverage Renesas’ R5 Modulation Technology to provide fast single-cycle transient response, digitally tuned compensation, and ultra-high 6 megahertz (MHz) (max) switching frequency during load transients. These features make it easier for power supply designers to design boards with 2 mm × 2 mm, 1 mm low profile inductors, small capacitors, and only a few passive components.

Renesas PMICs also 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, superior light load efficiency, regulation accuracy, and fast dynamic response significantly extend battery life for today’s feature-rich, power hungry devices.

The ISL91302B 2-Phase Configuration Efficiency.

Key Features of ISL91302B PMIC

• Available in three factory configurable options for one or two output rails:
  • Dual-phase (2+2) configuration supporting 10 A from each output
  • Triple-phase (3+1) configuration supporting 15 A from one output and 5 A from the second output
  • Quad-phase (4+0) configuration supporting 20 A from one output
• Small solution size: 7 mm × 10 mm for 4-phase design
• Input supply voltage range of 2.5 V to 5.5 V
• I²C or SPI programmable V_OUT from 0.3 V to 2 V
• R5 modulator architecture balances current loads with smooth phase adding and dropping for power efficiency optimization
• Provides 75 μA quiescent current in discontinuous current mode (DCM)
• Independent dynamic voltage scaling for each output
• ±0.7 percent system accuracy for –10 °C to 85 °C with remote voltage sensing
• Integrated telemetry ADC senses phase currents, output current, input/output voltages, and die temperature, enabling PMIC diagnostics during operation
• Soft-start and fault protection against under voltage (UV), over voltage (OV), over current (OC), over temperature (OT), and short circuit

Key Features of ISL91301A and ISL91301B PMICs

• Available in two factory configurable options:
  • ISL91301A: dual-phase, three output rails configured as 2+1+1 phase
  • ISL91301B: single-phase, four output rails configured as 1+1+1+1 phase
• 4 A per phase for 2.8 V to 5.5 V supply voltage
• 3 A per phase for 2.5 V to 5.5 V supply voltage
• Small solution size: 7 mm × 10 mm for 4-phase design
• I²C or SPI programmable V_OUT from 0.3 V to 2 V
• Provides 62 μA quiescent current in DCM mode
• Independent dynamic voltage scaling for each output
• ±0.7 percent system accuracy for –10 °C to 85 °C with remote voltage sensing
• Soft-start and fault protection against UV, OV, OC, OT, and short circuit

Pricing and Availability

The ISL91302B dual/single output PMIC is available now in a 2.551 mm × 3.670 mm, 54-ball WLCSP package and is priced at $3.90 USD in 1k quantities.

The ISL91301A triple-output PMIC and ISL91301B quad-output PMIC are available now in 2.551 mm × 2.87 mm, 42-ball WLCSP packages, both priced at $3.12 USD in 1k quantities.