ISL95813 Datasheet, PDF (1/24 Pages) Intersil Corporation – Single Phase Core Controller for VR12.6

Single Phase Core Controller for VR12.6
ISL95813
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.
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.
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, I_MAX, T_MAX, voltage transition
slew rate, and switching frequency.
Features
• Full VR12.6 specification compliance
• 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
• Digitally selectable switching frequency:
- 425kHz, 550kHz, 700kHz with ECO and PRO options
• Enhanced light-load efficiency discontinuous conduction mode
operation
• Ultra-small 20 lead 3mmx4mm QFN package
• Enable and power-good monitor
Applications
• Notebook Computers
• Tablets, Ultrabooks™, and AIO
Related Literature
• AN1846 Designer’s Guide to the ISL95813 Evaluation Board
205kΩ
113kΩ
2200pF
VR_ON
1
PGOOD ₂
VTT
499Ω
IMON
3
VRHOT# ₄
470kΩ (NTC) 3.83kΩ _NTC
5
27.4kΩ
COMP ₆
5.9kΩ
6800pF
20 19 18 17
ISL95813
20 Ld 3x4 QFN
E-PAD
(GND)
7
8
9 10
VIN
{4.6V TO 25V}
16 ^LG
BSC052N03LS
15 ^PHASE
LOUT
0.15µH
14 ^UG
0.22µF
BOOT
13
BSC011N03LS
VCC
12
PGRM2
11
124kΩ
1µF
3.65kΩ
COUT
VR12.6
CPU
14x22µF
CERAMIC
82pF _1.82kΩ
549Ω
0.056µF
11kΩ
2.61kΩ
10kΩ (NTC)
FIGURE 1. TYPICAL 40Amax, 12.6, APPLICATION DIAGRAM
May 15, 2013
FN8449.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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