ISL83491IBZ-T

ISL83491IBZ-T is a high‑efficiency, multi‑output DC‑DC regulator from Renesas Intersil (ISL8349x family). It combines one or more PWM controllers with integrated power MOSFETs to generate multiple rails from a single input supply, suitable for digital PMIC/PSU apps.
Key features (typical):
- Adjustable output voltages with sequencing/tracking
- High efficiency via synchronous rectification and fast transient response
- Current‑mode control, soft‑start, enable/shutdown
- Remote sensing and status/monitoring options
- Protections: overcurrent/overvoltage/thermal protection
Package/availability:
- IBZ package code, sold in tape and reel as indicated by “-T”
Applications:
- Core rails for CPUs/GPUs/FPGA, memory and other ASIC rails
- Telecom/industrial power modules and multi‑rail systems
Note: For exact electrical specs, pinout, and programming details, refer to the official ISL83491IBZ-T datasheet.

Direct one-to-one equivalents aren’t published for the ISL83491IBZ‑T. To find a substitute, match the topology: multi‑phase buck regulator controller, 4‑phase, PMBus support (if needed), input/output voltage range, current rating, switching frequency, and package. Share these specs and I’ll propose concrete equivalents from TI, Analog Devices, Renesas, etc., or use distributor cross-reference tools for closest matches.

- Pin count: 32 pins (32-pin QFN/package variant ISL83491IBZ-T)
- Function: VRM/buck regulator controller (dual‑phase, synchronous). Drives high‑ and low‑side MOSFETs for CPU/core voltage regulation, with features such as sense/voltage monitoring, soft-start, enable, PGOOD, and I2C interface.

Manufacturer: Intersil (a Renesas Electronics company; Intersil is now part of Renesas).
What kind of company: A semiconductor company that designs and manufactures analog and mixed-signal ICs, with emphasis on power management and related components.

ISL83491IBZ-T is a multi-output DC-DC power-management/ buck regulator used to generate multiple low-voltage rails in a single device. Common application areas include:
- Telecom and networking equipment (switches, routers, base stations)
- Data-center/servers and high-performance computing boards
- Industrial automation and embedded systems
- Consumer electronics and portable/compact systems requiring several rails
- FPGA/ASIC motherboards and other complex digital platforms
It is chosen for high efficiency, compact size, and the ability to supply multiple rails from a single controller.

ISL83491IBZ-T is in an 8‑pin QFN (leadless) package, 3×3 mm, shipped in tape‑and‑reel (-T).