ISL6556B Optimized Multiphase PWM Controller with 6-Bit DAC and Programmable Internal Temperature Compensation for VR10.X Application

VIN (min) (V)	3
VIN (max) (V)	12
VOUT (min) (V)	0.8375
VOUT (max) (V)	1.65
IOUT (max) (A)	>120

The ISL6556B controls microprocessor core voltage regulation by driving up to 4 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.

The ISL6556B utilizes rDS(ON) current sensing in each phase for adaptive voltage positioning (droop), channelcurrent balancing, and overcurrent protection. To ensure the accuracy of droop, a programmable internal temperature compensation function is implemented to nullify the effect of rDS(ON) temperature sensitivity.

A unity gain, differential amplifier is provided for remote voltage sensing. Any potential difference between remote and local grounds can be eliminated using the remote-sense amplifier. The precision threshold-sensitive enable input is available to accurately coordinate the startup of the ISL6556B with Intersil MOSFET driver IC. Dynamic-VIDTM technology allows seamless on-the-fly VID changes. The offset pin allows accurate voltage offset settings that are independent of VID setting. The ISL6556B uses 5V bias and has a built-in shunt regulator to allow 12V bias using only a small external limiting resistor.

ISL6556B 特点

Precision Multiphase Core Voltage Regulation
- Differential Remote Voltage Sensing
- ±0.5% System Accuracy Over Temperature and Life
- Adjustable Reference-Voltage Offset
Precision rDS(ON) Current Sensing
- Integrated Programmable Temperature Compensation
- Accurate Load-Line Programming
- Accurate Channel-Current Balancing
- Low-Cost, Lossless Current Sensing
Internal Shunt Regulator for 5V or 12V Biasing
Microprocessor Voltage Identification Input
- Dynamic VIDTM Technology
- 6-Bit VID Input
- 0.8375V to 1.600V in 12.5mV Steps
Threshold Enable Function for Precision Sequencing
Overcurrent Protection
Overvoltage Protection
- No Additional External Components Needed
- OVP Pin to drive optional Crowbar Device
2, 3, or 4 Phase Operation up to 1.5MHz per Phase
QFN 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 Available (RoHS Compliant)

ISL6556B 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 $
ISL6556BCBZ	量产	民用级	28 Ld SOIC	3	2.21
ISL6556BCBZ-T	量产	民用级	28 Ld SOIC T+R	3	2.21
ISL6556BCRZ	量产	民用级	32 Ld QFN	3	2.26
ISL6556BCRZ-T	量产	民用级	32 Ld QFN T+R	3	2.26
ISL6556BCB	停产	民用级	28 Ld SOIC	1	N/A
ISL6556BCBZA-T	停产	民用级	28 Ld SOIC T+R	3	N/A
ISL6556BCR	停产	民用级	32 Ld QFN	1	N/A
ISL6556BCB-T	To Be Discontinued	民用级	28 Ld SOIC T+R	1	2.65
ISL6556BCR-T	To Be Discontinued	民用级	32 Ld QFN T+R	1	2.26