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What is ISL6277A?

This electronic component, produced by the manufacturer "Intersil", performs the same function as "Multiphase PWM Regulator".


ISL6277A Datasheet PDF - Intersil

Part Number ISL6277A
Description Multiphase PWM Regulator
Manufacturers Intersil 
Logo Intersil Logo 


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DATASHEET
Multiphase PWM Regulator for AMD Fusion™ Mobile
CPUs Using SVI 2.0
ISL6277A
The ISL6277A is fully compliant with AMD Fusion SVI 2.0 and
provides a complete solution for microprocessor and graphics
processor core power. The ISL6277A 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 ISL6277A 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
December 4, 2015
FN8322.2
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. 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.

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ISL6277A equivalent
ISL6277A
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
ISL6277A
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
Submit Document Feedback
5
FN8322.2
December 4, 2015


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ISL6277A electronic component.


Information Total 30 Pages
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