ISL81487LIBZ-T

ISL81487LIBZ-T is a voltage‑mode switching regulator controller from Renesas Intersil (ISL). It is designed for multi‑phase buck regulators used in high‑current rails such as CPU/GPU VRMs. The device provides PWM control, reference/oscillator, soft‑start, enable, and protection features (overcurrent, overvoltage, thermal), with configurable feedback and compensation for stable multi‑phase operation. The LIBZ‑T suffix denotes a specific package/temperature/tape‑and‑reel option; check the datasheet for exact pinout and packaging. Typical use involves pairing the controller with MOSFETs, inductors, sense resistor, and feedback network to generate precise output voltages from a higher input. For detailed electrical characteristics, pinout, and application notes, consult the ISL81487 data sheet on Renesas Intersil’s website or distributors. If you share your target application, I can tailor the overview further.

I can’t give direct equivalents without specs. Please share the ISL81487LIBZ-T datasheet or confirm: (1) application (buck/boost/isolated), (2) input/output voltage range, (3) output current, (4) switching frequency, (5) external FETs required or integrated, (6) package/pinout. With that, I’ll propose exact drop-in substitutes from TI/Analog Devices/Intersil or note incompatibilities.

ISL81487LIBZ-T is a dual, multiphase, synchronous buck regulator controller. Key features typically include:
- Two-phase operation for fast transient response
- Wide input voltage range suitable for VRM use
- Programmable switching frequency (and options for spread-spectrum)
- Adjustable output voltage via external feedback network
- Gate-drive for high-side/low-side MOSFETs (synchronous buck)
- Overcurrent/short-circuit protection with fault latching
- Overvoltage and undervoltage protection
- Thermal shutdown and thermal monitoring
- Soft-start and tracking/power-on sequencing
- Enable/disable control and fault/status reporting
- Optional digital control/interface (I2C/SPI) on some variants
- Small package (LIBZ-T) with robust protection features
Note: exact feature set can vary by revision/variant; please consult the datasheet for the precise specifications and capabilities of ISL81487LIBZ-T.

- Pin count: 28 pins (LIBZ-T package).
- Function: Multiphase synchronous buck regulator/VRM controller. It provides PWM gate-drive outputs for high-/low-side FETs, voltage feedback, current sensing, soft-start, and protection features for DC-DC conversion (e.g., CPU core/GPU rails).

- Manufacturer: Intersil (brand now part of Renesas Electronics).
- What kind of company: A global semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits.

ISL81487LIBZ-T is a wide-input, multi-output DC-DC regulator used to generate multiple rails from a single supply. Typical application areas include:
- Automotive electronics (ECUs, infotainment, sensors)
- Industrial automation and motor drives
- Networking/telecom equipment (servers, switches, base stations)
- Computing hardware (CPU/GPU core and memory rails, FPGA/ASIC power)
- Portable or battery-powered systems requiring wide input range and high efficiency
Note: It supports high efficiency, good load/regulation performance, and dynamic response for multi-rail power architectures.

The ISL81487LIBZ-T uses a leadless QFN package (LIBZ family); the “-T” suffix indicates Tape & Reel packaging.