ISL6328A

• Product introduction

Key features

Converter processor core voltage via integrated multiphase power
Configuration flexibility
1 or 2 phase operation with internal drive
3 or 4 stages of operation with external PWM driver
PSI_L support
To improve efficiency, it falls off at light loads
Diode simulation in PSI mode
Gate voltage optimization
Precision core voltage regulation
Differential voltage remote sensing
± 0.6% system accuracy overheats
Optimize transient response of processor core voltage
Adaptive Phase Calibration (APA)
Active pulse positioning modulation
Fully differential continuous DCR current sensing
Precise load line programming
Precision channel current balancing
Temperature compensation
The serial VID interface handles clock rates up to 3.4MHz
Two-level overcurrent protection allows high current throttling (I DD_SPIKE)
Multi-level overvoltage protection
Selectable switching frequencies up to 1MHz
Simultaneous digital soft-start of both outputs
description

The ISL6328A dual PWM controller provides two synchronous buck DC/DC conversion efficiencies and is tightly regulated. The ISL6328A supports AMD processors, which are power controlled from a serial VID interface (SVI). The dual-output ISL6328A features a multiphase controller to support core voltage (VDD) and single-phase controller power supply northbridge (VDDNB). The precision core voltage regulation system consists of one to four phase PWM voltage regulator (VR) controllers. The integrated layout of the two power MOSFET drivers increases flexibility and reduces the number of external components in the multi-stage section. A single-phase PWM controller integrates a driver that provides a second precision voltage regulation system for the northbridge portion of the processor. This monolithic, dual-controller integrated driver solution provides a cost and space-saving power management solution. To reduce the number of bulk output capacitive load line programming applications, the ISL6328A has a temperature-compensated output voltage drop. The multi-stage section also includes advanced controls for optimal transient response, loading applications and removing loop functions. One of these features is highly accurate, sufficiently poor, continuous DCR current load line programming and channel current equalization induction. Dual edge modulation is another unique feature that allows for faster initial response to high di/dt load transients. The ISL6328A supports power-down mode when the number of PSI_L bits is set to a stage when the number of bits decreases.