The ISL91301A is a 4-phase, three output programmable Power Management IC (PMIC) and the ISL91301B is a 4-phase, four output programmable PMIC. They are optimized with highly efficient, synchronous buck converters capable of multiphase and single-phase operations. The devices can deliver 4A per phase continuous output current for 2. 8V to 5. 5V supply voltages or 3A per phase current for wider 2. 5V to 5. 5V supply voltages. It features four buck controllers and has the capability to reconfigure its 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 ISL91301A and ISL91301B 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 ISL91301A and ISL91301B deliver a highly robust power solution by featuring a controller based on the Renesas proprietary R5 Technology. The controller provides tight output accuracy and load regulation, ultra-fast transient response, seamless DCM/CCM transitions, and requires no external compensation. In addition to the standard interrupt, chip enable, and watchdog reset functions, the ISL91301A and ISL91301B also feature four MPIOs and two GPIOs capable of supporting SPI, I2C communication protocol, and various other pin mode functions.


  • Triple output 2+1+1 phases (ISL91301A) or quad output single phase (ISL91301B)
  • 4A per phase for the 2.8V to 5.5V supply voltage, VIN_SEL = AVIN
  • 3A per phase for the 2.5V to 5.5V supply voltage, VIN_SEL = GND
  • Small solution size (6x8mm2 for 4-phase design)
  • High efficiency (93% for 3.8VIN/1.8VOUT)
  • Low IQ in low power mode
  • ±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
  • 2.570mmx2.919mm 42 ball WLCSP with 0.4mm pitch

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active WLCSP-TKCURDL Reel 3000


Title language Type Format File Size Date
Datasheets & Errata
ISL91301A, ISL91301B Datasheet Datasheet PDF 3.17 MB
User Guides & Manuals
ISLUSBEVAL1Z User's Manual Manual - Development Tools PDF 257 KB
Application Notes & White Papers
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
TB500: Computing Power Reference Design Adaptation Guide Other PDF 351 KB
TB501: Computing Power Regulator Layout Checklist Other PDF 366 KB

Software & Tool Pages

Title Type Description Company
PowerNavigator Software Software Package Renesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface. Renesas