Overview
Description
The ISL91302B is a highly efficient, dual or single output, synchronous multiphase buck switching regulator that can deliver up to 5A per phase continuous output current. The ISL91302B features four integrated power stages and has the capability to assign its power stages to either output. This flexibility allows seamless design-in for a wide range of applications where dual, triple, or quad phase outputs are needed, such as CPU and GPU core power mobile applications. 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 I2C interface • External signal telemetry with an internal ADC • Dynamic Voltage Scaling (DVS) with selectable slew rate
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
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 3.07 MB | |
| Application Note | PDF 592 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
| Other | PDF 432 KB | |
| Application Note | PDF 650 KB | |
| Application Note | PDF 387 KB | |
| Application Note | PDF 349 KB | |
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Design & Development
Software & Tools
Software & Tools
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Software type
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| PowerNavigator Software Renesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface.
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Monitor Debugger/RAM Monitor | Renesas |
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Boards & Kits
Evaluation
ISL91302B22-EVZ
Active
ISL91302B Evaluation Board 1, 2+2 PMIC, WLCSP RoHS Compliant
The ISL91302B22-EVZ platform allows quick evaluation of the high performance features of the ISL91302B multi-output PMIC, which has two controllers capable of configuring its power stages for 2+2 channel outputs. Each channel can deliver up to 5A continuous output current per phase. The...
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Evaluation
ISL91302B31-EVZ
Active
ISL91302B Evaluation board 1, 3+1 PMIC, WLCSP RoHS compliant
The ISL91302B31-EVZ platform allows quick evaluation of the high performance features of the ISL91302B multi-output PMIC. The ISL91302B has two controllers capable of configuring its power stages for 3+1 channel outputs, in which VOUT1 is configured as a 3-phase output and VOUT2 is configured as...
Recommended Documents:
Evaluation
ISL91302B40-EVZ
Active
ISL91302B Evaluation Board 1, 4+0 PMIC, WLCSP RoHS Compliant
The ISL91302B40-EVZ platform allows quick evaluation of the ISL91302B high performance features, which is capable of providing a 4-phase single output. The output can deliver up to 5A continuous output current per phase, giving a total output of 20A. The ISL91302B uses the proprietary Renesas R5...
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Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Product Options
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Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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ISL91302BIIZ I2C Communication unable to establish using stm32 mcu
I am using STM32L496QGI6P mcu to communicate with the ISL91302BIIZ-TR5931 PMIC. Following is my relevant code which uses i2c3 (pg7/pg8 pins on mcu for scl/sda), I am also initializing GPIO PE1 as EN pin for PMIC. I am at the end scanning the i2c3 bus ...
Jun 4, 2025 -
ISL91302BIIZ I2C Communication unable to establish using stm32 mcu
I am using STM32L496QGI6P mcu to communicate with the ISL91302BIIZ-TR5931 PMIC. Following is my relevant code which uses i2c3 (pg7/pg8 pins on mcu for scl/sda), I am also initializing GPIO PE1 as EN pin for PMIC. I am at the end scanning the i2c3 bus ...
Jun 4, 2025 -
How is ISL91302B programmed by OTP?
... m considering to use the ISL91302B for powering a UltraScale+ 37P in a project（eg.VCU128). I have the following confusion, not found in the ISL91302B manual: 1. How to program I2C ADDRESS and fixed configuration by OTP, What specific steps and required tools are needed? 2. The ISL91302B is ...
Apr 10, 2023