OVERVIEW
The ISL91302B features integrated low ON-resistance MOSFETs, programmable PWM frequency, and automatic diode emulation, which maximizes efficiency while minimizing the external component count and solution size.
Using Renesas’s proprietary R5 modulator technology, the ISL91302B delivers a highly robust power solution capable of ultra-fast transient response, excellent loop stability, and seamless DCM/CCM transitions without requiring external compensation.
The ISL91302B is widely configurable through the factory OTP settings. Available features which can be used include:
• SPI or I2 C interface
• External signal telemetry with an internal ADC
• Dynamic Voltage Scaling (DVS) with selectable slew rate
KEY FEATURES
- Dual output 3+1 or 2+2, or single output 4-phase
- 2.5V to 5.5V supply voltage
- 5A per phase output current capability
- Small solution size (7x10 mm2)
- 4 phase design requires only 12 components
- High efficiency (94% peak)
- Low IQ in low power mode
- Supports 50A/μs per phase transients with <150μF nominal output capacitance
- Voltage, current, and temperature telemetry through integrated ADC plus auxiliary inputs
- ±0.7% system accuracy with remote voltage sensing
- OTP Programmable PWM frequency from 2MHz to 6MHz
- I2C and SPI programmable output from 0.3V to 2.0V
- Independent Dynamic Voltage Scaling (DVS) for each output
- Soft-start and fault detection (UV, OV, OC, OT), short circuit protection
- 2.551mmx 3.670mm 54 ball WLCSP with 0.4mm pin 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.