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PDF ISL95820 Data sheet ( Hoja de datos )
| Número de pieza | ISL95820 | |
| Descripción | Green Hybrid Digital Four Phase PWM Controller | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISL95820 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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Green Hybrid Digital Four Phase PWM Controller for
Intel VR12.5™ CPUs
ISL95820
The ISL95820 Pulse Width Modulation (PWM) controller IC
provides a complete low-cost solution for Intel VR12.5™
compliant microprocessor core power supplies. It provides the
control and protection for a Voltage Regulator (VR). The VR
incorporates 3 integrated drivers and can operate in 4-, 3-, 2-
or 1-phase configurations. The VR uses a serial control bus to
communicate with the CPU and achieve lower cost and smaller
board area.
The VR utilizes Intersil’s Robust Ripple Regulator R3
Technology™. The R3™ modulator has many advantages
compared to traditional modulators, including faster transient
response, variable switching frequency in response to load
transients, and improved light load efficiency due to diode
emulation mode with load-dependent low switching frequency.
The ISL95820 has several other key features. It supports
either DCR current sensing with a single NTC thermistor for
DCR temperature compensation, or more precise resistor
current sensing if desired. The output comes with remote
voltage sense, programmable VBOOT voltage, IMAX, voltage
transition slew rate and switching frequency, adjustable
overcurrent protection and Power-Good signal.
Features
• Serial data bus
• SMBus/PMBus/I2C interface with SVID conflict free
• Configurable 4-, 3-, 2- or 1-phase for the output using three
integrated gate drivers
• Green Hybrid Digital R3™ modulator
- Excellent transient response
- Phase shedding with power state selection
- Diode emulation in single-phase for high light-load
efficiency
• 0.5% system accuracy over-temperature
• Supports multiple current sensing methods
- Lossless inductor DCR current sensing
- Precision resistor current sensing
• Differential remote voltage sensing
• Programmable VBOOT voltage at start-up
• Resistor programmable IMAX, load line, diode emulation,
slope compensation, and switching frequency
• Adaptive body diode conduction time reduction
Applications
• Intel VR12.5 desktop computers
INTERSIL
DRIVER
VIN
PHASE4
VIN
PHASE3
VCORE
ISL95820
VIN
PHASE2
VIN
PHASE1
February 4, 2013
FN8318.0
1
FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT
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 2013. All Rights Reserved
Intersil (and design) and R3 Technology are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Free Datasheet http://www.datasheet4u.net/
1 page  
ISL95820
Pin Descriptions (Continued)
PIN #
SYMBOL
DESCRIPTION
26 LGATE2 Output of Phase 2 low-side MOSFET gate driver. Connect the LGATE2 pin to the gate of Phase 2 low-side MOSFET.
27 LGATE3 Output of Phase 3 low-side MOSFET gate driver. Connect the LGATE3 pin to the gate of Phase 3 low-side MOSFET.
28 PHASE3 Current return path for Phase 3 high-side MOSFET gate driver. Connect the PHASE3 pin to the node consisting of the
high-side MOSFET source, the low-side MOSFET drain, and the output inductor of Phase 3.
29 UGATE3 Output of Phase 3 high-side MOSFET gate driver. Connect the UGATE3 pin to the gate of Phase 3 high-side MOSFET.
30 BOOT3 Phase 3 internal gate driver high-side MOSFET bootstrap capacitor connection. Connect an MLCC capacitor between the
BOOT3 and the PHASE3 pins. The boot capacitor is charged through an internal boot diode connected from the VCCP pin
to the BOOT3 pin, each time the PHASE3 pin drops below VCCP minus the voltage dropped across the internal boot diode.
31 PWM4 PWM output for Phase 4. Phase 4 requires an external gate driver device. The Intersil ISL6625A driver is recommended.
32 VIN Input supply voltage, used for feed-forward. Connect this pin to the input voltage of the output drive stages.
33 PROG3 A resistor from the PROG3 pin to GND programs the internal modulator slope compensation and switching frequency.
34 PROG2 A resistor from the PROG2 pin to GND programs the initial power-up voltage (VBOOT), enables/disables the DC loadline
(droop) function, and enables/disables diode emulation mode (DEM) in Power States 2 and 3 (PS2 and PS3).
35
36, 37
PROG1
A resistor from PROG1 pin to GND programs IMAX, the designed nominal maximum load current of the VR. The value of
IMAX establishes the scaling of the reported VR output current, which can be read via the SVID or PMBus interfaces. The
PROG1 resistor is chosen such that the reported IMAX current is FFh when the output current is equal to the maximum
load current.
I2DATA, I2CLK Interface of SMBus/PMBus/I2C. Tie to VCC with 4.7kΩ pull-up resistor when not used.
38, 39, 40
SDA,
SVID communication bus between the CPU and the VR.
ALERT#, SCLK,
5 FN8318.0
February 4, 2013
Free Datasheet http://www.datasheet4u.net/
5 Page 
ISL95820
Electrical Specifications Operating Conditions: VDD = 5V, TA = 0°C to +70°C (ISL95820CRTZ), TA = -40°C to +85°C
(ISL95820IRTZ), fSW = 300kHz, unless otherwise noted. Boldface limits apply over the operating temperature ranges. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN MAX
(Note 7) TYP (Note 7)
VR_ON Leakage Current
IVR_ON
VR_ON = 0V
VR_ON = 1V
-1 0
3.5 6
SCLK Maximum Speed
42
SCLK Minimum Speed
13
SCLK, SDA Leakage
VR_ON = 0V, SCLK and SDA = 0V and 1V
-1
1
VR_ON = 1V, SCLK and SDA = 1V
-2
1
VR_ON = 1V, SDA = 0V
-26 −21 −16
VR_ON = 1V, SCLK= 0V
-52 −42 −32
SDA Low Resistance
I2CLK Maximum Speed
I2CLK Minimum Speed
I2C Timeout
I2DATA Low Resistance
I2CLK, I2DATA Leakage
ISDA = 10mA
7
400
12
50
25 30 35
II2DATA = 4mA
VR_ON = 0V, I2CLK and I2DATA = 0V and 1V
VR_ON = 1V, I2CLK and I2DATA = 1V
VR_ON = 1V, I2DATA = 0V
VR_ON = 1V, I2CLK= 0V
-1
-2
-1
-1
28 40
1
1
1
1
NOTE:
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
UNITS
µA
µA
MHz
MHz
µA
µA
µA
µA
Ω
kHz
kHz
ms
Ω
µA
µA
µA
µA
11
FN8318.0
February 4, 2013
Free Datasheet http://www.datasheet4u.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL95820.PDF ] | |
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