The ISL91211A is a 4-phase, three output programmable Power Management IC (PMIC) and the ISL91211B is a 4‑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. 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. ISL91211A and ISL91211B 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 ISL91211A and ISL91211B deliver a highly robust power solution by featuring a controller based on the Renesas proprietary R5 Technology that 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, ISL91211A and ISL91211B also feature four MPIOs and three GPIOs capable of supporting SPI, I2C communication protocol, and various other pin mode functions.


  • Triple output 2+1+1 phases (ISL91211A) or quad output single phase (ISL91211B)
  • 5V to 5.5V supply voltage
  • 5A per phase output current capability
  • Small solution size (for four phase design)
  • High efficiency (94.7% for 3.8VIN/1.8VOUT)
  • Low IQ in low power mode
  • Proprietary 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
  • 551mmx3.67mm 54 ball WLCSP with 0.4mm pin pitch


製品名 Part Status Pkg. Type Carrier Type MOQ 購入/サンプル
Active WLCSP-TKCURDL Reel 3000


タイトル language 分類 形式 サイズ 日付
ISL91211A, ISL91211B Datasheet データシート PDF 3.13 MB
R16AN0006: Power Management Solution for Xilinx ZYNQ Ultrascale+ RFSoC アプリケーションノート PDF 293 KB
AN1681: Grounding Techniques アプリケーションノート PDF 509 KB
AN1684: Nonideality of Ground アプリケーションノート PDF 397 KB
Five Easy Steps to Create a Multi-Load Power Solution ホワイトペーパー PDF 846 KB
TB500: Computing Power Reference Design Adaptation Guide その他資料 PDF 351 KB
TB501: Computing Power Regulator Layout Checklist その他資料 PDF 366 KB


タイトル language 分類 形式 サイズ 日付
Multiphase PMIC I2C Control Tool Rev C5 ソフトウェア ZIP 301.07 MB


製品名 タイトル 分類 Company
ISL91211BII-EV1Z Quad Output Power Management IC Evaluation Board 評価 Renesas