The ISL91212A is a four-phase, three output programmable Power Management IC (PMIC) and the ISL91212B is a four-phase, four output programmable PMIC. They are optimized with highly efficient synchronous buck converters capable of multiphase and single-phase operations that can deliver up to 5A per phase continuous output current. They feature four buck controllers and can reconfigure their power stages to these controllers. This flexibility allows seamless design-in for a wide range of applications that require high output power and small solution size. The ISL91212A and ISL91212B integrate low ON-resistance MOSFETs and programmable PWM frequency, allowing the use of very small external inductors and capacitors. They feature automatic Diode Emulation and Pulse Skipping modes under light-load conditions to further improve efficiency and maximize battery life. The ISL91212A and ISL91212B deliver a highly robust power solution by featuring a controller based on the proprietary Renesas R5 Technology, which provides tight output accuracy and load regulation, ultra-fast transient response, seamless DCM/CCM transitions, and requires no external compensation. In addition to standard interrupt and chip enable functions, the ISL91212A and ISL91212B feature three MPIOs and two GPIOs capable of supporting the I2C communication protocol and various other pin mode functions.


  • Triple output 2+1+1 phases (ISL91212A) or quad output 1+1+1+1 single phase (ISL91212B)
  • 2.5V to 5.5V supply voltage
  • 5A per phase output current capability
  • Small solution size (7x10mm2 for 4-phase design)
  • High efficiency (94.7% for 3.8VIN/1.8VOUT)
  • Low IQ in low power mode
  • Patented control scheme reduces output capacitor and supports fast load transient (such as 50A/μs per phase)
  • ±0.7% system accuracy, remote voltage sensing
  • Programmable PWM frequency from 2MHz to 6MHz
  • I2C programmable output from 0.3V to 2V
  • Independent Dynamic Voltage Scaling (DVS) for each output
  • Soft-start and fault detection (UV, OV, OC, OT), short-circuit protection
  • 2.551mmx3.67mm 35 ball WLCSP with 0.5mm pin pitch




  • Smartphones
  • AR/VR Glasses
  • Drones
  • Optical Transceiver Modules
  • Artificial Intelligence (AI) Processors
  • Client/Enterprise/Data Center SSD
  • NAS


Type Title Date
Datasheet PDF 2.86 MB
Application Note PDF 592 KB
Application Note PDF 509 KB
Application Note PDF 397 KB
Other PDF 432 KB
Application Note PDF 650 KB
Application Note PDF 387 KB
Application Note PDF 349 KB
8 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

Software Downloads

Type Title Date
Software & Tools - Other Log in to Download ZIP 574.78 MB
1 item

Boards & Kits

Boards & Kits