OVERVIEW
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, I2 C communication protocol, and various other pin mode functions.
KEY FEATURES
- 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
BLOCK DIAGRAM

PARAMETRICS
Design Resources and Tools
Selection Tool
PowerCompass Online Tool
The PowerCompass™ tool helps you find Renesas parts that match your requirements, performs system analysis & more.
Design Tool
PowerNavigator Software
Configure and monitor digital-DC devices. Easily change features and functions of your power supply design with a simple GUI.
Simulation Tool
iSim Online Designer
Select supporting components, build your schematic and validate your power management and op amp designs.
Cross Reference
Intersil Cross Reference
Cross-reference based on data from industry sources. Support for the online tool has been discontinued, but the data is still available.
Knowledge Base
Switching Regulators FAQs
Find answers to common questions, support articles and development hints.