Model No: ISL91212BIIZ-TR5928

Renesas Electronics Corporation ISL91212BIIZ-TR5928

Manufacturer: Renesas Electronics Corporation
SEMICON NO.: ISL91212BIIZ-TR5928
Package: 35‑WLCSP
Stock: In stock
Description: PMIC 4‑Phase Buck Converter
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 Mfr  Renesas Electronics Corporation 
 Product Series Quad‑Output PMIC / 4‑Phase Buck Converter
 Number of Outputs 4 (Independent phases)
 Input Voltage (VIN) 2.5 V to 5.5 V 
 Output Voltage (VOUT) 0.3 V to 2 V
 Current per Phase  5 A
 Peak Efficiency   Up to 95% 
 Switching Frequency 2 MHz to 6 MHz
 Control Interface I²C
 Operating Temperature -40°C to +125°C
 Package 35‑WLCSP
 Mounting Type Surface Mount
 Compliance    
 RoHS Compliant
ISL91212BIIZ-TR5928 quad output PMIC 
The ISL91212BIIZ-TR5928, manufactured by Renesas Electronics, is a high-efficiency quad-output power management IC (PMIC) with an I²C interface, integrating four synchronous buck converters in a compact 35-ball WLCSP package (3.7×2.6×0.6mm). Operating from a 2.5V to 5.5V input supply, each channel delivers up to 5A continuous current with a programmable output voltage range of 0.3V to 1.2V, achieving a peak efficiency of 94.7% for low-power, high-density systems. Built on Renesas’ proprietary R5 controller technology, it offers tight regulation, ultra-fast transient response, and seamless DCM/CCM transitions without external compensation, making it ideal for battery-powered and space-constrained designs.
Features and Applications
This PMIC integrates low on-resistance MOSFETs and a programmable PWM frequency, enabling the use of tiny external inductors and capacitors to minimize solution size. It supports automatic diode emulation and pulse-skipping modes under light loads, reducing quiescent current to 62µA and extending battery life. The I²C interface allows dynamic voltage scaling (DVS) and fault monitoring, while three MPIOs and two GPIOs enhance system flexibility. Protection features include overcurrent, overvoltage, undervoltage, and thermal shutdown, ensuring robust operation across -40°C to 125°C. 
The ISL91212BIIZ-TR5928 is widely used in portable electronics such as smartphones, tablets, and wearables, providing multi-rail power for processors, memory, and sensors. It excels in IoT devices, drones, and AR/VR equipment, where high efficiency and compact size are critical. Additionally, it serves in industrial controls, SSDs, and AI edge devices, delivering stable, programmable power for FPGAs, ASICs, and low-voltage circuits in space-constrained, battery-operated systems.
Alternativebuck converters
● MAX77693 (Maxim Integrated): A quad-channel buck PMIC with I²C control, 5A per channel, and 95% peak efficiency, compatible with compact WLCSP designs.
● RT91212 (Richtek): A pin-compatible 4-output PMIC with 5A current capability, I²C interface, and high efficiency for portable electronics.
● TPS65910 (Texas Instruments): A multi-rail PMIC with four buck converters, 4A per channel, and I²C programmability for industrial and IoT applications.
● MP2629 (MPS): A quad synchronous buck PMIC with 5A output, I²C control, and low quiescent current for battery-powered devices.
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