onsemi NCP81535 Eight + One Phase Output Controller
onsemi NCP81535 Eight + One Phase Output Controller is a dual rail, eight plus one phase buck solution optimized for Intel’s IMVP9.2 CPUs. The multi-phase rail control system combines dual-edge pulse-width modulation (PWM) with direct current resistance (DCR) current sensing. This combination provides an ultra-fast initial response to dynamic load events and reduced system cost. The onsemi NCP81535 features an ultra-low offset current monitor amplifier with programmable offset compensation for high-accuracy current monitoring.
Features
- VIN range of 4.5V to 21V
- Startup into pre-charged loads while avoiding false OVP
- Digital soft start ramp
- Adjustable Vboot
- High impedance differential output voltage amplifier
- Dual VID table support to be compatible with IMVP9.2
- Supports high-current extensions
- Dynamic reference injection
- Programmable output voltage slew rates
- Dynamic VID feed-forward
- Differential current sense amplifiers for each phase
- Programmable Adaptive Voltage Positioning (AVP)
- Adjustable switching frequency range
- Digitally stabilized switching frequency
- Ultrasonic operation
- Supports the acoustic noise mitigation function
- PSYS input monitor (SVID address 0D)
- Support for VCCIN_AUX IMON input
- Meets Intel’s IMVP9.2 specifications
- Current mode dual edge modulation for fast initial response to transient loading
- Lead-free device
Applications
- High-Performance Computing (HPC)
- Gaming and enthusiast PCs
- Laptops and ultrabooks
- Enterprise and data center equipment
- Embedded systems
Internal Block Diagram
Published: 2025-05-20
| Updated: 2025-06-19