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| Multiphase PWM Controller with Precision Rds, On or DCR Current Sensing |
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| Ordering Information |
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 iBuy direct from Intersil
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 iBuy direct - out of stock
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 Request samples
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 Check distributor inventory
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Available in RoHS/Pb-Free
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL6561CRZ |
Active |
Comm |
40 Ld QFN |
3 |
2.39 |
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| ISL6561CRZ-T |
Active |
Comm |
40 Ld QFN T+R |
3 |
2.39 |
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| ISL6561CRZ-TK |
Active |
Comm |
40 Ld QFN T+R |
3 |
2.39 |
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| ISL6561CRZA |
Active |
Comm |
40 Ld QFN |
3 |
2.39 |
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| ISL6561CRZA-T |
Active |
Comm |
40 Ld QFN T+R |
3 |
2.39 |
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| ISL6561IRZ |
Active |
Ind |
40 Ld QFN T+R |
3 |
2.49 |
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| ISL6561IRZ-T |
Active |
Ind |
40 Ld QFN T+R |
3 |
2.49 |
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| ISL6561CR |
InActive |
Comm |
40 Ld QFN |
2 |
N/A |
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| ISL6561IR |
InActive |
Ind |
40 Ld QFN |
2 |
N/A |
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| ISL6561IR-T |
InActive |
Ind |
40 Ld QFN T+R |
2 |
N/A |
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| ISL6561CR-T |
To Be
Discontinued |
Comm |
40 Ld QFN T+R |
2 |
2.39 |
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| The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice. |
| MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020 |
| SMD = Standard Microcircuit Drawing |
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 Description |
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The ISL6561 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. 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 ISL6561 features a high bandwidth control loop and ripple frequencies of >4MHz to provide optimal response to the transients.
Today's microprocessors require a tightly regulated output voltage position versus load current (droop). The ISL6561 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 the lower MOSFET conduction intervals. Current sensing provides the needed signals for precision droop, channel-current balancing, and over-current protection.
The accuracy of the current-sensing metho
d is enhanced by the ISL6561's temperature compensation function. Droop accuracy can be affected by increasing rDS(ON) or DCR with elevated temperature. The ISL6561 uses an internal temperature-sensing element to provide programmable temperature compensation. Correctly applied, temperature compensation can completely nullify the effect of rDS(ON) or DCR temperature sensitivity.
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 ISL6561 with any other voltage rail. Dynamic-VID™ technology allows seamless on-the-fly VID changes. The offset pin allows accurate voltage offset settings that are independent of VID setting. The ISL6561 uses 5V bias and has a built-in shunt regulator to allow 12V bias using only a small external limiting resistor. |
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 Key Features |
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Precision Multiphase Core Voltage Regulation
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Differential Remote Voltage Sensing
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±0.5% System Accuracy Over Life, Load, Line and Temperature
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Adjustable Reference-Voltage Offset
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Precision rDS(ON) or DCR Current Sensing
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Integrated Programmable Temperature Compensation
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Accurate Load-Line Programming
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Accurate Channel-Current Balancing
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Differential Current Sense
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Low-Cost, Lossless Current Sensing
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Internal Shunt Regulator for 5V or 12V Biasing
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Microprocessor Voltage Identification Input
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Dynamic VID™ technology
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6-Bit VID Input
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0.8375V to 1.600V in 12.5mV Steps
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Threshold-Sensitive Enable Function for synchronizing with driver POR
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Over Current Protection
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Over-Voltage Protection
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No Additional External Components Needed
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OVP Pin to drive opitional Crowbar Device
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2, 3, or 4 Phase Operation
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Greater Than 1MHz Operation (> 4MHz Ripple)
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Pb-free Available
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QFN Package Option
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QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Product Outline
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QFN Near Chip Scale Package Footprint; Improves PCB Efficiency, Thinner in Profile
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| Related Documentation |
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 Datasheet(s): |
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 Parametric Data |
| | VIN (min) (V) | | 3 | | | VIN (max) (V) | | 12 | | | VOUT (min) (V) | | .8375 | | | VOUT (max) (V) | | 1.65 | | | IOUT (max) (A) | | ≥120 | | | VBIAS (V) | | 5, 12 | | | Applications | | VR10 | |
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 Application Block Diagrams |
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| | ISL6316 | | Enhanced 4-Phase PWM Controller with 6-Bit VID Code Capable of Precision RDS(on) or DCR Differential Current Sensing for VR10 Application | | | ISL6556A | | Optimized Multiphase PWM Controller with 6-Bit DAC for VR10.X Application | | | ISL6556B | | Optimized Multiphase PWM Controller with 6-Bit DAC and Programmable Internal Temperature Compensation for VR10.X Application | | | ISL6563 | | Two-Phase Multiphase Buck PWM Controller with Integrated MOSFET Drivers | | | ISL6565A | | Multiphase PWM Controller with Precision rDS(ON) or DCR Current Sensing for VR10.X Application | | | ISL6565B | | Multiphase PWM Controller with Precision rDS(ON) or DCR Current Sensing for VR10.X Application | | | ISL6566 | | Three-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications | | | ISL6566A | | Three-Phase Buck PWM Controller with Two Integrated MOSFET Drivers and One External Driver Signal | | | ISL6568 | | Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications | |
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