ISL6564A Multiphase PWM Controller with Linear 6-Bit DAC Capable of Precision rDS(ON) or DCR Differential Current Sensing

VIN (min) (V)	3
VIN (max) (V)	12
VOUT (min) (V)	0.525
VOUT (max) (V)	1.3
IOUT (max) (A)	>120

The ISL6564A is a Multiphase PWM controller which controls microprocessor core voltage regulation by driving up to 4 synchronous-rectified buck channels. It features a high bandwidth control loop to provide optimal response to the load transients. With switching frequency up to 1.5MHz per phase, the ISL6564A based voltage regulator requires minimum components and PCB area in DC/DC converter application.

The ISL6564A senses current by utilizing patented techniques to measure the voltage across the on resistance, rDS(ON), of the lower MOSFETs or DCR of the output inductor during their conduction intervals. Current sensing provides the needed signals for precision droop, channelcurrent balancing, and overcurrent protection.

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 thresholdsensitive enable input is available to accurately coordinate the start up of the ISL6564A 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. The ISL6564A uses a 5V bias and has a built-in shunt regulator to allow 12V bias using only a small external limiting resistor.

ISL6564A 特点

Precision Multiphase Core Voltage Regulation
- Differential Remote Voltage Sensing
- ±0.5% System Accuracy
- Adjustable Reference-Voltage Offset
Precision rDS(ON) or DCR Current Sensing
- Accurate Load-Line Programming
- Accurate Channel-Current Balancing
- Differential Current Sense
- Low-Cost, Lossless Current Sensing
Internal Shunt Regulator for 5V or 12V Biasing
Microprocessor Voltage Identification Input
- Self Clocked Dynamic VIDTM Control Technology
- 6-Bit VID Input
- 0.525V to 1.300V in 12.5mV Steps
Threshold-Sensitive Enable Function for Power Sequencing Control
Overcurrent Protection
Overvoltage Protection
- No Additional External Components Needed
- OVP Pin to Drive Crowbar Device
1, 2, 3, or 4 Phase Operation
Up to 1.5MHz Per Phase Operation (>6MHz Ripple)
QFN Package
- 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 Plus Anneal Available (RoHS Compliant)

ISL6564A 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 $
ISL6564ACRZ	量产	民用级	40 Ld QFN	2	6.21
ISL6564ACRZ-T	量产	民用级	40 Ld QFN T+R	2	6.21
ISL6564AIRZ	量产	工业级	40 Ld QFN	2	7.11
ISL6564AIRZ-T	量产	工业级	40 Ld QFN T+R	2	7.11