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PDF ISL6398 Data sheet ( Hoja de datos )
| Número de pieza | ISL6398 | |
| Descripción | Advanced Linear EAPP Digital 6-Phase Green PWM Controller | |
| Fabricantes | Intersil | |
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DATASHEET
Advanced Linear EAPP Digital 6-Phase Green PWM Controller for
Digital Power Management with NVM and AUTO Phase Shedding
ISL6398
The ISL6398 is a smart and smallest 6-Phase Green PWM
controller, designed for networking, datacenter, and POL
applications. It includes programmable functions and
telemetries for easy use and system flexibility using SMBus,
PMBus, or I2C interface, which is designed to program NVM
banks up to 8 different compensations and system
parameters. This minimizes external components and
significantly reduces design complexity and PCB area, and
simplifies the manufacturing process.
The ISL6398 utilizes Intersil’s proprietary Advanced Linear EAPP
(Enhanced Active Pulse Positioning) Digital control scheme to
achieve the extremely fast linear transient response with fewer
output capacitors and overcomes many hurdles of traditional
digital approach, which uses non-linear, discrete control method
for both voltage loop and current balance loop and runs into beat
frequency oscillation and non-linear response. The ISL6398
accurately monitors the load current via the IMON pin and
reports this information via the READ_IOUT register for power
management. The ISL6398 features auto-phase shedding. In low
power operation, the magnetic core and switching losses are
significantly reduced with lower phase count operation, yielding
high efficiency at light load. When APA is triggered, the dropped
phase(s) are added back to sustain heavy load transient
response and efficiency. It optimizes the efficiency from light to
full load for Greener Environment without sacrificing the transient
performance.
The ISL6398 senses the output current continuously by a
dedicated current sense resistor or the DCR of the output
inductor. The sensed current flows through a digitally
programmable 1% droop resistor for precision load line control.
Current sensing circuits also provide the needed signals for
channel-current balancing, average overcurrent protection and
individual phase current limiting. The TM pin senses an NTC
thermistor’s temperature, which is internally digitized for thermal
monitoring and for integrated thermal compensation of the
current sense elements of the regulator.
The ISL6398 features remote voltage sensing and completely
eliminates any potential difference between remote and local
grounds. This improves regulation and protection accuracy. The
threshold-sensitive enable input is available to accurately
coordinate the start-up of the ISL6398 with other voltage rails.
Features
• SMBus/PMBus/I2C Compatible
- Programmable IMAX, TMAX, BOOT, and address
- Programmable soft-start rate and DVID rate
- Up to 1.5MHz
- NVM to store up to 8 Configurations with programmable
frequency, droop, auto, faults (OCP, UVP, CFP), etc.
- No firmware requirement and hassle
• Advanced Linear EAPP Digital control scheme (patented)
- Digitally programmable compensation
- Auto phase shedding option for greener environment
- Variable frequency control during load transients to
reduce beat frequency oscillation
- Linear control with evenly distributed PWM pulses for
better phase current balance during load transients
- Voltage feed-forward and ramp adjustable options
- High frequency compensation option
- Active phase adding and dropping for enhanced light load
efficiency
• Phase doubler and coupled-inductor compatibility
• Differential remote voltage sensing with ±0.5% accuracy
• Programmable minimum phase count operation
• Programmable slew rate of dynamic VID with dynamic VID
compensation (DVC)
• Support 3-state 5V or 3.3V PWM DrMOS and driver
• Zero current shutdown with ISL6627
• Precision resistor or DCR differential current sensing
- Accurate load-line (Droop) programming and control
- Accurate current monitoring and channel-current
balancing with calibration capability
• True input current sensing for catastrophic failure protection
• Average overcurrent protection and channel current limiting
• High common mode current sense input (VCC-1.5V)
• Open sensing and single point of loop failure protection
• Thermal monitoring and integrated compensation
• 1- to 6-Phase option and up to 2MHz per phase
• Start-up into precharged load
• Pb-free (RoHS Compliant)
• 40 Ld 5x5 Plastic Package
Applications
• High efficiency and high density digital power
• High performance multi-phase POL and network
• Cloud Computing, Router, Data Center and Storage
• General processor power
August 13, 2015
FN8575.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2014, 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6398
ISL6398 Internal Block Diagram
RSET
ISEN1+
ISEN1-
ISEN2+
ISEN2-
ISEN3+
ISEN3-
ISEN4+
ISEN4-
ISEN5+
ISEN5-
ISEN6+
ISEN6-
RGND
VSEN
VSEN_OVP
ISENIN+
ISENIN-
TM_EN_OTP
VCC
EN_PWR_CFP
SM_PM_I2CLK
SM_PM_ALERT#
SM_PM_I2DATA
HIGH SPEED AND
HIGH FREQUENCY
BALANCE
TEMPERATURE
COMPENSATION
CHANNEL
CURRENT
SENSE
AVERAGE
OVERCURRENT AND
CYCLE-BY-CYCLE
CURRENT LIMITING
PROTECTION
OUTPUT VOLTAGE
SENSE
LINEAR CONTROL
EAPP PWM
MODULATOR
DIGITAL
COMPENSATION:
DROOP, DVID,
PSICOMP, AUTO,
THERMAL COMP
FEEDFORWARD
CLOCK AND RAMP
CONTROL
INPUT I/V
SENSE
TEMP SENSE
POWER-ON
RESET (POR)
PMBus
DAC (VID AND OFFSET)
AND SOFT-START
STATE MACHINE
INTERFACES
CONTROL, MONITOR
REGISTERS, TELEMETRY
AND CALIBRATION
NVM
ADC
PWM
DRIVERS
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PROTECTION
REAL-TIME AND
HIGH-SPEED
FAULT LOGIC
VR_RDY
VR_HOT#
AUTO PHASE
CONTROL
CORE/MEMORY
ADDRESS AND
NVM
BANKS CONTROL
IMON
AUTO
VRSEL_ADDR
NVM_BANKS_BT
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5
FN8575.1
August 13, 2015
5 Page 
ISL6398
Electrical Specifications Recommended Operating Conditions, VCC = 5V, Unless Otherwise specified. Boldface limits apply across the
operating temperature range. (Continued)
PARAMETER
TEST CONDITIONS
MIN MAX
(Note 7) TYP (Note 7) UNITS
OSCILLATORS
Accuracy of Switching Frequency Setting
390kHz, F3[2:0] = 0h = Original, ISL6398HRTZ
390kHz, F3[2:0] = 0h = Original, ISL6398IRTZ
355 390 425
348 390 425
kHz
kHz
Maximum Switching Frequency
- 2.025 -
MHz
Minimum Switching Frequency
- 0.120 -
MHz
DVID = 0.3125mV/µs, Minimum
0.3125 -
- mV/µs
Soft-start Ramp Rate
DVID = 2.5mV/µs
DVID = 5.0mV/µs
2.5 3.0 3.4 mV/µs
5.0 6.0 7.0 mV/µs
DVID = 13.25mV/µs, Maximum
13.25 -
- mV/µs
Minimum Dynamic VID Slew Rate
DVID = 0.3125mV/µs, Minimum
0.3125 -
- mV/µs
Maximum Dynamic VID Slew Rate
DVID = 13.25mV/µs, Maximum
13.25 -
- mV/µs
Maximum Duty Cycle Per PWM
390kHz
95 98 99
%
PWM GENERATOR
Sawtooth Amplitude
BUFFERED COMP AMPLIFIER
VRRAMP_ADJ = 0.7V, ISENIN+ = 12V
VRRAMP_ADJ = 1.0V, ISENIN+ = 12V
VRRAMP_ADJ = 1.2V, ISENIN+ = 12V
VRRAMP_ADJ = 1.5V, ISENIN+ = 12V
- 0.7 -
- 1.0 -
- 1.2 -
- 1.5 -
V
V
V
V
Open-Loop Gain
Open-Loop Bandwidth
RL = 10k to ground
- 96 - dB
- 20 - MHz
Maximum Output Voltage
No Load
3.6 4.0
-
V
Output High Voltage
1mA Load
3.4 3.9
-
V
Output Low Voltage
1mA Load
1.88
1.99
V
PWM OUTPUT (PWM[6:1])
PWM = Low with 1mA Load, for Fast Transition
- 80 -
PWM[6:1] Sink Impedance
PWM = Low with 1mA Load, ISL6398HRTZ
170 285 425
PWM = Low with 1mA Load, ISL6398IRTZ
170 285 400
PWM[6:1] Source Impedance
PWM = High, Forced to 3.7V
60 125 210
PWM Mid-Level
0.4mA Load, 5V PWM
36 40 44 %VCC
PWM Mid-Level
0.4mA Load, 3.3V PWM
24 28 31 %VCC
CURRENT SENSE AND OVERCURRENT PROTECTION
Sensed Current Tolerance
CS Offset and Mirror Error Included,
RSET = 12.8k
(TJ = 0°C to +70°C)
(TJ = -40°C to +100°C, HRTZ, IRTZ)
Average OC Trip Level at Normal CCM PWM Mode (TJ = 0°C to +70°C)
CS Offset and Mirror Error Included,
RSET = 12.8k
(TJ = -40°C to +100°C, HRTZ, IRTZ)
Average Overcurrent Trip Level at PSI1/2/3 Mode (TJ = 0°C to +70°C)
CS Offset and Mirror Error Included,
RSET = 12.8k
(TJ = -40°C to +100°C, HRTZ, IRTZ)
73 78 82.5 µA
72 78 83
µA
96 103 111
95 103 112
µA
µA
92 107 122
90 125 124
µA
µA
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FN8575.1
August 13, 2015
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL6398.PDF ] | |
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