The ISL6324A dual PWM controller delivers high efficiency and tight regulation from two synchronous buck DC/DC converters. The ISL6324A supports hybrid power control of AMD processors which operate from either a 6-bit parallel VID interface (PVI) or a serial VID interface (SVI). The dual output ISL6324A features a multi-phase controller to support uniplane VDD core voltage and a single phase controller to power the Northbridge (VDDNB) in SVI mode. Only the multi-phase controller is active in PVI mode to support uniplane VDD only processors. A precision uniplane core voltage regulation system is provided by a 2-to-4-phase PWM voltage regulator (VR) controller. The integration of two power MOSFET drivers, adding flexibility in layout, reduce the number of external components in the multi- phase section. A single phase PWM controller with integrated driver provides a second precision voltage regulation system for the North Bridge portion of the processor. This monolithic, dual controller with integrated driver solution provides a cost and space saving power management solution. For applications which benefit from load line programming to reduce bulk output capacitors, the ISL6324A features output voltage droop. The multi-phase portion also includes advanced control loop features for optimal transient response to load application and removal
The ISL6324A is a monolithic dual PWM hybrid controller that powers AMD SVI and PVI split‑plane processors. It integrates two synchronous buck converters, each with its own MOSFET driver, and supports load‑line programming, droop control, and dual‑edge modulation for fast transient response.
The document includes electrical specifications, absolute maximum ratings, recommended operating conditions, pin‑out diagrams, typical application circuits for both SVI and PVI modes, and a detailed package outline for the 48‑lead QFN package.
| Switching Frequency (selectable) | up to 1 MHz |
|---|---|
| Package | 48‑lead QFN 7 × 7 mm (L48.7x7) |
| Gate Drive Bias Range | 5 V to 12 V |
The selectable switching frequency can be set up to 1 MHz.
The device is offered in a 48‑lead QFN package measuring 7 mm × 7 mm (part numbers ISL6324ACRZ and ISL6324AIRZ).