ISL68223IRAZ-T

ISL68223IRAZ-T is a multi‑phase PWM controller from Intersil/Renesas used to build CPU/GPU core VRMs. It drives external N‑channel MOSFETs in interleaved buck configurations (typically 2‑ or 4‑phase) to deliver high current with reduced ripple. Key ideas: programmable switching frequency, adjustable output voltage via feedback network, soft‑start and enable/Power‑Good, and protection features (overcurrent, over/under‑voltage, thermal shutdown). It relies on external FETs and passive components for the power stage and sense/feedback. The IR AZ‑T suffix denotes a tape‑and‑reel packaging variant. Designed for VRMs in motherboards, graphics cards, and telecom power supplies. For exact electrical specs, pinout, and application notes, refer to the ISL68223 datasheet.

ISL68223IRAZ-T is a multi-rail, multi‑phase PWM controller for VRMs. Key features:
- Multi-rail, multi-phase interleaved operation for reduced ripple and smaller components
- Synchronous buck architecture using external MOSFETs
- Programmable switching frequency
- Adjustable output voltages via external resistor dividers; supports tracking/sequencing
- Enable input, soft-start, and ramp control
- Remote sense/feedback capability
- Protections: undervoltage lockout, overvoltage protection, overcurrent protection, thermal shutdown
- Fault reporting and latch, with PGOOD (power-good) signaling
- Suitable for Tier-1 CPU/GPU and other high‑current applications
- Packaging: Tape & Reel (IRAZ‑T), RoHS-compliant
Note: exact pinout, timing, and electrical specs are in the datasheet; use it for detailed design.

- Pin count: 28 pins (28-pin package).
- Function: Intersil ISL68223IRAZ-T is a multi‑phase PWM controller for voltage regulator modules (VRMs). It generates the PWM signals to drive external MOSFETs in a multi‑phase buck regulator to produce a stable CPU core (Vcore) or similar DC supply, and includes features such as oscillator, error amplifier, enable, power‑good, and protection functions.

Manufacturer: Intersil (now a subsidiary of Renesas Electronics Corporation).
What kind of company: A semiconductor company specializing in analog, mixed-signal, and power-management ICs.

- Multiphase VRM for CPU core (Vcore) and GPU power delivery in desktop/workstation/server systems
- FPGA/ASIC power regulation requiring high current and tight regulation
- Motherboard VRMs and high‑end gaming rigs
- Data-center, telecom and networking equipment DC‑DC conversion needing high efficiency
- Embedded/portable computing systems with compact, high‑current VRMs
- General high‑current, low‑noise DC‑DC applications from 12V to low rails in advanced power architectures

Leadless QFN package (32-pin, QFN-32); tape-and-reel shipping (-T).