ISL6327A Enhanced 6-Phase PWM Controller with 8-Bit VID Code and Differential Inductor DCR or Resistor Current Sensing

VIN (min) (V)	3
VIN (max) (V)	12
VOUT (min) (V)	0.5
VOUT (max) (V)	1.6
IOUT (max) (A)	>200

The ISL6327A controls microprocessor core voltage regulation by driving up to 6 synchronous-rectified buck channels in parallel. Multiphase buck converter architecture uses interleaved timing to multiply channel ripple frequency and reduce input and output ripple currents. Lower ripple results in fewer components, lower component cost, reduced power dissipation, and smaller implementation area.

Microprocessor loads can generate load transients with extremely fast edge rates. The ISL6327A utilizes Intersil's proprietary Active Pulse Positioning (APP) and Adaptive Phase Alignment (APA) modulation scheme to achieve the extremely fast transient response with fewer output capacitors.

Today's microprocessors require a tightly regulated output voltage position versus load current (droop). The ISL6327A senses the output current continuously by utilizing patented techniques to measure the voltage across the dedicated current sense resistor or the DCR of the output inductor. Current sensing provides the needed signals for precision droop, channel-current balancing, and overcurrent protection. A programmable integrated temperature compensation function is implemented to effectively compensate the temperature variation of the current sense element. The current limit function provides the overcurrent protection for the individual phase.

A unity gain, differential amplifier is provided for remote voltage sensing. Any potential difference between remote and local grounds can be completely eliminated using the remote-sense amplifier. Eliminating ground differences improves regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start-up of the ISL6327A with any other voltage rail. Dynamic-VIDTM technology allows seamless on-the-fly VID changes. The offset pin allows accurate voltage offset settings that are independent of VID setting.

ISL6327A 特点

Proprietary Active Pulse Positioning and Adaptive Phase Alignment Modulation Scheme
Precision Multiphase Core Voltage Regulation
- Differential Remote Voltage Sensing
- ±0.5% System Accuracy Over Life, Load, Line and Temperature
- Adjustable Precision Reference-Voltage Offset
Precision Resistor or DCR Current Sensing
- Accurate Load-Line Programming, Channel-Current Balancing, Differential Current Sense
Microprocessor Voltage Identification Input
- Dynamic VIDTM Technology
- 8-Bit VID Input with Selectable VR11 code and Extended VR10 Code at 6.25mV Per Bit
- 0.5V to 1.600V Operation Range
Monotonic Output Voltage Soft-start
Thermal Monitoring
Integrated Programmable Temperature Compensation
Overcurrent Protection and Channel Current Limit
Overvoltage Protection with OVP Output Indication
2-, 3-, 4-, 5- or 6-Phase Operation
Adjustable Switching Frequency up to 1MHz Per Phase
Package Option
- QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Product Outline
- QFN Near Chip Scale Package Footprint; Improves PCB Efficiency, Thinner in Profile
Pb-Free (RoHS Compliant)

ISL6327A 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 $
ISL6327ACRZ	量产	民用级	48 Ld QFN	3	5.51
ISL6327ACRZ-T	量产	民用级	48 Ld QFN T +R	3	5.51
ISL6327AIRZ	量产	工业级	48 Ld QFN	3	6.61
ISL6327AIRZ-T	量产	工业级	48 Ld QFN T +R	3	6.61