Take your interleaved DC-DC buck converter designs to market faster with groundbreaking XPhase®
architecture from International Rectifier. The XPhase® chip set consists of the control IC,
containing all the one-per-converter circuitry, and a scalable array of phase converters, each using a single
phase IC with all the one-per-phase circuitry.
Support both VR11 & 8bit VID and extended VR10 7bit VID Code
Support VR11 7bit VID, VR10 7bit extended VID and Opteron™/Athlon 64 5bit VID Code
5-bit AMD Opteron™ compatible VID
Programmable dynamic VID slew rate. No discharge of output capacitors during dynamic VID step-down (can be disabled) Programmable 150kHz to 1MHz oscillator
Programmable voltage positioning
Programmable softstart
Programmable hiccup over-current protection with delay to prevent false triggering
Simplified powergood provides indication of proper operation and avoids false triggering
Operates from 12V input with 9.5V undervoltage lockout
6.8V/5mA bias regulator provides system reference voltage
Offers unprecedented flexibility and scalability to support one-to-X phase operation.
Incorporates unique body braking to achieve dramatic improvements in transient response time while improving efficiency.
Implements novel control and average output inductor current sensing to accomplish very accurate current sharing with support for 100% duty cycle and over-lapping phases. In addition, it supports single cycle transient response.
Best load line performance. Exceeds Intel’s VR 10 load line tolerance specifications.
Higher integration enables a compact solution by reducing part count.
Phase ICs (IR3086A, IR3087, IR3088A):
2.5A average gate drive current
Loss-less inductor current sense
Internal inductor DCR temperature compensation
Programmable phase delay
Programmable feed-forward voltage mode PWM Ramp
1MHz per-phase operation
Current sense amplifier drives a single wire average current share bus
Current share amplifier reduces PWM ramp slope to ensure sharing between phases
Body braking disables synchronous MOSFET for improved transient response and prevents negative output voltage at converter turn-off
OVP comparator with 100ns response (not included in IR3088)
- The Next Generation Multiphase Architecture
