DATASHEET
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Single-Phase Core Controller for VR12.6
ISL95813
Features
The ISL95813 single-phase controller provides a fully compliant
VR12.6 power supply solution for Intel™ microprocessors. It
provides a tightly regulated output voltage that is programmed
through a high speed serial bus interface with the CPU. This
interface also allows the CPU to acquire real-time information
from the voltage regulator (VR), which includes load current and
VR temperature.
• Full VR12.6 specification compliance
Based on Intersil's Robust Ripple Regulator R3™ Technology, the
PWM modulator provides faster transient response and settling
time when compared against traditional modulation schemes.
Its variable frequency topology also allows for natural period
stretching Discontinuous Conduction Mode (DCM) for increased
efficiency and power savings in light load situations.
• Digitally selectable switching frequency:
- 425kHz, 550kHz, 700kHz with ECO and PRO options
The ISL95813 has several other key features that include: DCR
current sensing with single NTC thermal compensation; discrete
resistor current sensing; differential remote voltage feedback;
and user-programmable boot voltage, IMAX, TMAX, voltage
transition slew rate and switching frequency.
• Enable and power-good monitor
• Wide input voltage range: 4.6V to 25V
• R3™ control architecture delivers excellent transient response
and power state mode transitions
• Current monitor (IMON) with temperature compensation
• VRHOT# indicator for CPU protection
• Enhanced light-load efficiency discontinuous conduction mode
operation
• Ultra small 20 Ld 3mmx4mm QFN package
Applications
• Notebook computers
• Tablets, ultrabooks and AIO
Related Literature
AN1846 Designer’s Guide to the ISL95813 Evaluation Board
20
VR_ON
2200pF
PGOOD
IMON
470k (NTC) 3.83k NTC
27.4k
PRGM1
1
16
2
15
3
VRHOT#
VIN
{4.6V TO 25V}
17
14
ISL95813
20 Ld 3x4 QFN
4
13
LG
BSC052N03LS
LOUT
PHASE
0.15µH
UG
BOOT
COUT
VR12.6
CPU
14x22µF
CERAMIC
0.22µF
BSC011N03LS
VCC
5
COMP
5.9k
12
E-PAD
(GND)
6
7
FB
6800pF
8
9
11
10
PGRM2
124k
1.82k
3.65k
2.61k
0.056µF
82pF
1µF
ISUMP
499
18
ISUMN
VTT
19
RTN
113k
SDA
SCLK
ALERT#
205k
11k
549
10k (NTC)
FIGURE 1. TYPICAL 40AMAX, 12.6, APPLICATION DIAGRAM
January 29, 2015
FN8449.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL95813
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FN8449.2
January 29, 2015