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PDF ISL62773A Data sheet ( Hoja de datos )
| Número de pieza | ISL62773A | |
| Descripción | Multiphase PWM Regulator | |
| Fabricantes | Intersil | |
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DATASHEET
Multiphase PWM Regulator for AMD Fusion™ Mobile
CPUs Using SVI 2.0
ISL62773A
The ISL62773A is fully compliant with AMD Fusion™ SVI 2.0
and provides a complete solution for microprocessor and
graphics processor core power. The ISL62773A controller
supports two Voltage Regulators (VRs) with three integrated
gate drivers and two optional external drivers for maximum
flexibility. The Core VR can be configured for 3-, 2-, or 1-phase
operation while the Northbridge VR supports 2- or 1-phase
configurations. The two VRs share a serial control bus to
communicate with the AMD CPU and achieve lower cost and
smaller board area compared with two-chip solutions.
The PWM modulator is based on Intersil’s Robust Ripple
Regulator R3™ Technology. Compared to traditional
modulators, the R3™ modulator can automatically change
switching frequency for faster transient settling time during
load transients and improved light load efficiency.
The ISL62773A has several other key features. Both outputs
support DCR current sensing with single NTC thermistor for
DCR temperature compensation or accurate resistor current
sensing. Both outputs utilize remote voltage sense, adjustable
switching frequency, OC protection and power-good.
Applications
• AMD Fusion CPU/GPU core power
• Notebook computers
Features
• Supports AMD SVI 2.0 serial data bus interface
- Serial VID clock frequency range 100kHz to 25MHz
• Dual output controller with integrated drivers
- Two dedicated core drivers
- One programmable driver for either Core or Northbridge
• Precision voltage regulation
- 0.5% system accuracy over-temperature
- 0.5V to 1.55V in 6.25mV steps
- Enhanced load line accuracy
• Supports multiple current sensing methods
- Lossless inductor DCR current sensing
- Precision resistor current sensing
• Programmable 1-, 2- or 3-phase for the core output and 1- or
2-phase for the Northbridge output
• Adaptive body diode conduction time reduction
• Superior noise immunity and transient response
• Output current and voltage telemetry
• Differential remote voltage sensing
• High efficiency across entire load range
• Programmable slew rate
• Programmable VID offset and droop on both outputs
• Programmable switching frequency for both outputs
• Excellent dynamic current balance between phases
• Protection: OCP/WOC, OVP, PGOOD and thermal monitor
• Small footprint 48 Ld 6x6 QFN package
- Pb-free (RoHS compliant)
Core Performance
100
90
80
70
60
50
40
30
20
10
0
0
VIN = 8V
VIN = 12V
VIN = 19V
VOUT CORE = 1.1V
5 10 15 20 25 30 35 40 45 50 55
IOUT (A)
FIGURE 1. EFFICIENCY vs LOAD
1.12
1.10
1.08
1.06
1.04
1.02
VIN = 12V
VIN = 8V
1.00
VIN = 19V
0.98
VOUT CORE = 1.1V
0.96 0 5 10 15 20 25 30 35 40 45 50 55
IOUT (A)
FIGURE 2. VOUT vs LOAD
November 19, 2015
FN8410.1
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, 2013, 2015. 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.
1 page  
ISL62773A
Simplified Application Circuit for Mid-Power CPUs [2+1 Configuration]
* Resistor required or ISEN1_NB
will pull HIGH if left open and
disable Channel 1.
10kΩ*
NBN
NBP
+5V
Ri
NTC
Cn
ISEN1_NB
ISEN2_NB
ISUMN_NB
ISUMP_NB
PWM_Y
FCCM_NB
PWM2_NB OPEN
VIN
VNB
NBP NBN
**
*OPTIONAL
VNB_SENSE
**
*OPTIONAL
VCORE_SENSE
VP1
VP2
VN1
VN2
µP
+5V
Ri
Cn NTC
COMP_NB
FB_NB
IMON_NB
NTC_NB
VSEN_NB
PWROK
SVT
SVD
SVC
VDDIO
BOOTX
UGATEX
PHASEX
LGATEX
VR_HOT_L
IMON
COMP
ISL62773A
NTC
FB2
FB
VSEN
RTN
ISEN1
ISEN2
ISEN3
BOOT2
UGATE2
PHASE2
LGATE2
BOOT1
ISUMN
UGATE1
PHASE1
OPEN
OPEN
OPEN
OPEN
THERMAL INDICATOR
VIN
VP2
VIN
VN2
ISUMP
LGATE1
VP1 VN1
VCORE
FIGURE 5. TYPICAL APPLICATION CIRCUIT USING RESISTOR SENSING
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FN8410.1
November 19, 2015
5 Page 
ISL62773A
Absolute Maximum Ratings
Supply Voltage, VDD, VDDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7V
Battery Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +28V
Boot Voltage (BOOT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +33V
Boot to Phase Voltage (BOOT-PHASE) . . . . . . . . . . . . . . . . -0.3V to +7V (DC)
-0.3V to +9V (<10ns)
Phase Voltage (PHASE) . . . . . . . . . . . . . . . . -7V (<20ns Pulse Width, 10µJ)
UGATE Voltage (UGATE) . . . . . . . . . .PHASE - 0.3V (DC) to BOOTPHASE - 5V
(<20ns Pulse Width, 10µJ) to BOOT LGATE Voltage
-2.5V (<20ns Pulse Width, 5µJ) to VDD + 0.3V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VDD + 0.3V)
Open-Drain Outputs, PGOOD, PGOOD_NB, VR_HOT_L. . . . . . . -0.3V to +7V
Thermal Information
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
48 Ld QFN Package (Notes 4, 5) . . . . . . . .
29
3.5
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+150°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±5%
Battery Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 25V
Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . HRZ, -10°C to +100°C
IRZ, -40°C to +100°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +125°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
5. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Operating Conditions: VDD = 5V, TA = -10°C to +100°C (HRZ), TA = -40°C to +100°C (IRZ), fSW = 300kHz,
unless otherwise noted. Boldface limits apply across the operating temperature range, -40°C to +100°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
(Note 6)
MAX
TYP (Note 6))
UNIT
INPUT POWER SUPPLY
+5V Supply Current
IVDD
ENABLE = 1V
ENABLE = 0V
8 11 mA
1 µA
Battery Supply Current
VIN Input Resistance
POWER-ON-RESET THRESHOLDS
IVIN
RVIN
ENABLE = 0V
ENABLE = 1V
1
620
µA
kΩ
VDD POR Threshold
SYSTEM AND REFERENCES
VDD_PORr
VDD_PORf
VDD rising
VDD falling
4.00
4.35
4.15
4.50
V
V
System Accuracy
HRZ
%Error (VOUT)
No load; closed loop, active mode range,
VID = 0.75V to 1.55V
VID = 0.25V to 0.74375V
-0.5
-10
+0.5
+10
%
mV
IRZ
%Error (VOUT)
No load; closed loop, active mode range,
VID = 0.75V to 1.55V
VID = 0.25V to 0.74375V
-0.8
-12
+0.8
+12
%
mV
Maximum Output Voltage
Minimum Output Voltage
CHANNEL FREQUENCY
VOUT(max)
VOUT(min)
VID = [00000000]
VID = [11111111]
1.55
0
V
V
Nominal Channel Frequency
Adjustment Range
fSW(nom)
280 300 320
300 450
kHz
kHz
AMPLIFIERS
Current-Sense Amplifier Input Offset
Error Amp DC Gain
Error Amp Gain-Bandwidth Product
HRZ
IRZ
Av0
GBW
IFB = 0A
IFB = 0A
CL = 20pF
-0.15
-0.20
+0.15
+0.20
119
17
mV
mV
dB
MHz
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL62773A.PDF ] | |
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