The ISL91302BIK is a highly efficient, dual or single output, synchronous multiphase buck switching regulator that can deliver up to 5A per phase maximum output current. The ISL91302BIK features four integrated power stages and two controllers. The ISL91302BIK can assign its power stages and controllers to two dual-phase outputs (2+2) or one three-phase and one-phase output (3+1) or one-phase output (4+0). This flexibility allows seamless design-in for a wide range of applications in which dual, triple, or quad-phase outputs are needed, such as CPU and GPU core power mobile applications.

ISL91302BIK integrates low ON-resistance MOSFETs at 2MHz switching frequency, allowing very small external inductors and capacitors to be used. With automatic Diode Emulation and Pulse Skipping modes under light-load conditions, this feature improves efficiency and maximizes battery life. The ISL91302BIK delivers a highly robust power solution through a controller based on the Renesas proprietary Rapid Robust Ripple Regulator (R5) technology, offering tight output accuracy and load regulation, ultra-fast transient response, seamless DCM/CCM transitions, and no required external compensation.

In addition to the standard interrupt, chip enable, and watchdog reset functions, the ISL91302BIK also features four MPIOs and two GPIOs that support SPI, I2C communication protocol, external signal telemetry with an internal ADC, Dynamic Voltage Scaling (DVS) with selectable slew rates, and various other pin mode functions.


  • Dual output 3+1 or 2+2, or single output 4-phase
  • 2.7V to 5.5V supply voltage
  • 5A per phase output current capability
  • Small solution size
  • High efficiency (94% peak for 3.3V VIN, 1.8V VOUT, L = 220nH)
  • Low IQ in low power mode
  • Proprietary control scheme reduces the output capacitor and supports fast load transients (such as 50A/µs per phase)
  • Voltage, current, and temperature telemetry through integrated ADC plus auxiliary inputs
  • ±0.7% system accuracy, remote voltage sensing
  • I2C and SPI programmable output from 0.3V to 2.0V
  • Independent Dynamic Voltage Scaling (DVS) for each output
  • Soft-start and fault detection (UV, OV, OC, OT), short-circuit protection
  • 4.7mm x  6.3mm 35 ball TFBGA with 0.8mm pin pitch




  • Industrial controls and FPGAs
  • Computing servers and systems
  • Home gateways and appliances


Type Title Date
Datasheet PDF 1.22 MB
Brochure PDF 5.51 MB 日本語
Application Note PDF 509 KB
Application Note PDF 397 KB
4 items

Design & Development

Software & Tools

Software & Tools

Software title
Software type
PowerNavigator Software
Renesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface.
Monitor Debugger/RAM Monitor Renesas
1 item


12V Sync Buck Regulator Family Delivers Up to 14A

Find out how Intersil's high efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails in industrial and infrastructure applications.


12V Synchronous Buck Regulator Family

Today I would like to introduce one of the most efficient and compact synchronous buck regulator families in the marketplace today.

There are many 12V rails in industrial applications today that need a buck converter to step the voltage down to a lower voltage and deliver up to 14A. Some of these applications often require a very efficient and compact solution. The highly integrated buck regulators listed here allow the users to meet all these requirements.

The ISL85009, ISL85012 and ISL85014 are pin compatible, very efficient and are able to deliver up to 14A. In applications that need less than 5A, Renesas offers ISL85003 and ISL85005 that are pin compatible. The ISL85009, ISL85012 and ISL85014 can operate from 3.8V to 18V input voltage, and the output voltage can be set as low as 0.6V. This family is highly integrated. The high-side and low-side FETs, with a bootstrap diode and compensation circuits are all integrated which helps to reduce the size, cost and bill of material.

This family is also highly reliable. It has high-side and low-side overcurrent protection, input and output overvoltage protection, over-temperature protection and negative current protection all integrated in the IC. This family also provides full feature sets and design flexibility to customers.

For instance, the selectable OCP scheme feature gives flexibility to the power supply designer to choose between hiccup and latch-off OCP mode, depending on their application requirements. Finally, the ISL85009, ISL85012 and ISL85014 are pin compatible, highly efficient and capable of delivering up to 14A in a very small 3.5mm x 3.5mm TQFN package.

As you see in the efficiency curve here, the ISL85009 provides one of the most efficient solution in the marketplace today. To support our customers with this family, we have developed several evaluation and demo boards.

Supporting tools such as iSim model, PowerCompass, schematic and Gerber files are all available online for this family on our website.