Tiny Power Management Chips Extend Battery Life In Smartphones

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power management chip

Today’s consumers are demanding more from their smartphones and tablets such as faster connectivity, richer and bigger displays, better multimedia capabilities and slim design. Still, the number one requested feature is longer battery life. To meet this challenge, the mobile industry is continually innovating to deliver application processors that offer increased computational requirements required by these breakthrough mobile experiences, while maintaining power-efficient operation leveraging innovative power management techniques.

In pursuit of this, Renesas has unveiled three programmable power management ICs (PMICs) that claim to 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.

Renesas claims that the ISL91302B can deliver up to 20A of output current and 94% peak efficiency for application processors, artificial intelligence processors, industrial MPUs, and FPGAs, all within the 70 mm2 solution size that is more than 40 percent smaller than competitive PMICs.

Using the chips, power supply designers can design boards with 2mm x 2mm, 1mm low profile inductors, small capacitors, and only a few passive components, according to Renesas.

Key features of ISL91302B PMIC:

  • Available in three factory configurable options for one or two output rails:
  • Dual-phase (2 + 2) configuration supporting 10A from each output
  • Triple-phase (3 + 1) configuration supporting 15A from one output and 5A from the second output
  • Quad-phase (4 + 0) configuration supporting 20A from one output
  • Small solution size: 7mm x 10mm for 4-phase design
  • Input supply voltage range of 2.5V to 5.5V
  • I2C or SPI programmable Vout from 0.3V to 2V
  • R5 modulator architecture balances current loads with smooth phase adding and dropping for power efficiency optimization
  • Provides 75μA quiescent current in discontinuous current mode (DCM)
  • Independent dynamic voltage scaling for each output
    ±0.7percent 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
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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
  • 4A per phase for 2.8V to 5.5V supply voltage
  • 3A per phase for 2.5V to 5.5V supply voltage
  • Small solution size: 7mm x 10mm for 4-phase design
  • I2C or SPI programmable Vout from 0.3V to 2V
  • Provides 62μA quiescent current in DCM mode
  • Independent dynamic voltage scaling for each output
    ±0.7percent 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

“Smartphone and tablet application processors require smaller footprint power supplies and higher output current and efficiency to maximize battery life,” said Mark Downing, Vice President, Core Power Solutions Division, Renesas Electronics Corporation. “The ISL91302B and ISL91301A/B PMICs offer designers everything they need to solve their toughest PCB layout challenges, dynamically scale performance, and extend battery run-time.”

Pricing and Availability:

The ISL91302B dual/single output PMIC is available now in a 2.551mm x 3.670mm, 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 2.551mm x 2.87mm, 42-ball WLCSP packages, both priced at $3.12 USD in 1k quantities.

Click here to view the Press release

 

 

 

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