ISL6264 Two-Phase Core Controller for AMD Mobile Turion CPUs

VIN (min) (V)	5
VIN (max) (V)	24
VOUT (min) (V)	0.375
VOUT (max) (V)	1.55
IOUT (max) (A)	60

The ISL6264 is a two-phase buck controller with embedded gate drivers. The two-phase buck controller uses two interleaved channels to effectively double the output voltage ripple frequency and thereby reduce output voltage ripple amplitude with fewer components, lower component cost, reduced power dissipation, and smaller real estate area. ISL6264 can also be configured as single-phase controller for low power CPU applications.

The heart of the ISL6264 is the patented R3 TechnologyTM, Intersil's Robust Ripple Regulator modulator. Compared with the traditional multi-phase buck regulator, the R3 TechnologyTM has the fastest transient response. This is due to the R3 modulator commanding variable switching frequency during a load transient.

To boost battery life, the ISL6264 supports PSI_L for deeper sleep mode via automatically enabling different operation modes. At heavy load operation of the active mode, the regulator commands the two phase continuous conduction mode (CCM) operation. While the PSI_L is asserted during the deeper sleep mode, the ISL6264 smoothly disables one phase and operates in a one-phase diode emulation mode (DE) to maximize the efficiency at light load.

A 6-bit digital-to-analog converter (DAC) allows dynamic adjustment of the core output voltage from 0.375V to 1.55V. A 0.5% system accuracy of the core output voltage over temperature at active mode is achieved by the ISL6264.

A unity-gain differential amplifier is provided for remote CPU die sensing. This allows the voltage on the CPU die to be accurately measured and regulated per AMD mobile CPU specifications. Current sensing can be realized using either lossless inductor DCR sensing or precision resistor sensing. A single NTC thermistor network thermally compensates the gain and the time constant of the DCR variations.

ISL6264 特点

Precision Two-phase Core Voltage Regulator
- 0.5% System Accuracy Over-temperature
Voltage Positioning with Adjustable Load Line and Offset
Internal Gate Driver with 2A Driving Capability
Dynamic Phase Adding/Dropping
Differential Current Sensing: DCR or Resistor
Microprocessor Voltage Identification Input
- 6-Bit VID Input
- 0.775V to 1.55V in 25mV Steps
- 0.375V to 0.7625V in 12.5mV Steps
Adjustable Reference-Voltage Offset
Audio Filter Enable/Disable
User Programmable Switching Frequency
Differential Remote CPU Die Voltage Sensing
Static and Dynamic Current Sharing
Overvoltage, Undervoltage, and Overcurrent Protection
Pb-Free (RoHS Compliant)

ISL6264 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ISL6264CRZ	量产	民用级	40 Ld QFN	3	3.81
ISL6264CRZ-T	量产	民用级	40 Ld QFN T+R	3	3.81
ISL6264EVAL1Z	Coming Soon	工业级	评估板	评估板	价格录入中