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PDF ISL6377 Data sheet ( Hoja de datos )
| Número de pieza | ISL6377 | |
| Descripción | Multiphase PWM Regulator | |
| Fabricantes | Intersil | |
| Logotipo |  |
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DATASHEET
Multiphase PWM Regulator for AMD Fusion™ Desktop
CPUs Using SVI 2.0
ISL6377
The ISL6377 is fully compliant with AMD Fusion™ SVI 2.0 and
provides a complete solution for microprocessor and graphics
processor core power. The ISL6377 controller supports two
Voltage Regulators (VRs) with three integrated gate drivers and
three optional external drivers for maximum flexibility. The Core
VR can be configured for 4-, 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 ISL6377 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
• Desktop 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-, 3- or 4-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 = 12V
VIN = 8V
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
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 2, 2015
FN8336.1
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 Inc. 2012, 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  
ISL6377
Simplified Application Circuit for Mid-Power CPUs [3+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
COMP_NB
PWM_Y
FCCM_NB
PWM2_NB
IMON_NB
OPEN
NTC_NB
+12V
VNB
NBP NBN
**
*OPTIONAL
VNB_SENSE
FB_NB
VSEN_NB
VR_HOT_L
IMON
NTC
THERMAL INDICATOR
**
*OPTIONAL
VCORE_SENSE
VP1
VP2
VP3
VN1
VN2
VN3
µP
+5V
Ri
Cn
NTC
PWROK
SVT
SVD
SVC
VDDIO
COMP
ISL6377
PWM4
BOOTX
UGATEX
PHASEX
LGATEX
OPEN
FB
VSEN
RTN
ISEN1
ISEN2
ISEN3
ISEN4
ISUMN
ISUMP
BOOT2
UGATE2
PHASE2
LGATE2
BOOT1
UGATE1
PHASE1
LGATE1
+12V
VP3 VN3
+12V
VP2 VN2
+12V
VCORE
VP1 VN1
FIGURE 5. TYPICAL APPLICATION CIRCUIT USING RESISTOR SENSING
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5
FN8336.1
November 2, 2015
5 Page 
ISL6377
Electrical Specifications Operating Conditions: VDD = 5V, TA = -10°C to +100°C (HRZ), TA = -40°C to +85°C (IRZ), fSW = 300kHz, unless
otherwise noted. Boldface limits apply across the operating temperature range, -40°C to +100°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN MAX
(Note 6) TYP (Note 6) UNIT
POWER-GOOD (PGOOD AND PGOOD_NB) AND PROTECTION MONITORS
PGOOD Low Voltage
PGOOD Leakage Current
PWROK High Threshold
VOL IPGOOD = 4mA
IOH PGOOD = 3.3V
0.4 V
-1 1 µA
750 mV
VR_HOT_L Pull-Down
11 Ω
PWROK Leakage Current
1 µA
VR_HOT_L Leakage Current
1 µA
GATE DRIVER
UGATE Pull-Up Resistance
UGATE Source Current
UGATE Sink Resistance
UGATE Sink Current
LGATE Pull-Up Resistance
LGATE Source Current
LGATE Sink Resistance
LGATE Sink Current
UGATE to LGATE Dead Time
LGATE to UGATE Dead Time
PROTECTION
RUGPU
IUGSRC
RUGPD
IUGSNK
RLGPU
ILGSRC
RLGPD
ILGSNK
tUGFLGR
tLGFUGR
200mA Source Current
UGATE - PHASE = 2.5V
250mA Sink Current
UGATE - PHASE = 2.5V
250mA Source Current
LGATE - VSSP = 2.5V
250mA Sink Current
LGATE - VSSP = 2.5V
UGATE falling to LGATE rising, no load
LGATE falling to UGATE rising, no load
1 1.5
2
1 1.5
2
1 1.5
2
0.5 0.9
4
23
28
Ω
A
Ω
A
Ω
A
Ω
A
ns
ns
Overvoltage Threshold
Undervoltage Threshold
Current Imbalance Threshold
OVH VSEN rising above setpoint for >1µs
275 325 375
mV
OVH VSEN falls below setpoint for >1µs
275 325 375
mV
One ISEN above another ISEN for >1.2ms 9 mV
Way Overcurrent Trip Threshold
[IMONx Current Based Detection]
IMONxWOC All states, IDROOP = 60µA, RIMON = 135kΩ
15
µA
Overcurrent Trip Threshold
[IMONx Voltage Based Detection]
LOGIC THRESHOLDS
VIMONx_OCP
All states, IDROOP = 45µA,
IIMONx = 11.25µA, RIMON = 135kΩ
1.485
1.51
1.535
V
ENABLE Input Low
ENABLE Input High
ENABLE Leakage Current
VIL
VIH
VIH
IENABLE
HRZ
IRZ
ENABLE = 0V
ENABLE = 1V
1.6
1.65
-1
0
18
1
1
35
V
V
V
µA
µA
SVT Impedance
50 Ω
SVC, SVD Input Low
SVC, SVD Input High
SVC, SVD Leakage
VIL % of VDDIO
VIH % of VDDIO
ENABLE = 0V, SVC, SVD = 0V and 1V
70
-1
30 %
%
1 µA
ENABLE = 1V, SVC, SVD = 1V
-5 1 µA
ENABLE = 1V, SVC, SVD = 0V
-35 -20
-5
µA
PWM
PWM Output Low
PWM Output High
PWM Tri-State Leakage
V0L Sinking 5mA
V0H Sourcing 5mA
PWM = 2.5V
1.0 V
3.5 V
0.5 µA
THERMAL MONITOR
NTC Source Current
NTC = 0.6V
27 30 33
µA
NTC Thermal Warning Voltage
600 640 680
mV
Submit Document Feedback 11
FN8336.1
November 2, 2015
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL6377.PDF ] | |
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