The ISL91211A is a 4-phase, three output programmable Power Management IC (PMIC) and the ISL91211BIIZ-T 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 ISL91211BIIZ-T 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 ISL91211BIIZ-T 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 ISL91211BIIZ-T also feature four MPIOs and three GPIOs capable of supporting SPI, I2C communication protocol, and various other pin mode functions.
Feature
- 4-phase, four output programmable power management IC (PMIC)
- 2.5V to 5.5V supply voltage
- 5A per phase output current capability
- High efficiency (94.7% for 3.8VIN/1.8VOUT)
- Low IQ in low power mode
- ±0.7% system accuracy and 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) and short-circuit protection
