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LM27262MTDX

Features: ` Compatible with VRD10 Voltage Regulation Specification for Intel Pentium 4 and Prescott Processors` Supports Intel SpeedStep™ technology (Geyserville-III™), which enables real-time dynamic switching of the CPU core voltage and the CPU clock frequency` Uses external gate d...

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SeekIC No. : 004395025 Detail

LM27262MTDX: Features: ` Compatible with VRD10 Voltage Regulation Specification for Intel Pentium 4 and Prescott Processors` Supports Intel SpeedStep™ technology (Geyserville-III™), which enables r...

LM27262MTDX Data Sheet

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Part Number:
LM27262MTDX
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Compatible with "VRD10 Voltage Regulation Specification" for Intel Pentium 4 and Prescott Processors
` Supports Intel SpeedStep™ technology (Geyserville-III™), which enables real-time dynamic switching of the CPU core voltage and the CPU clock frequency
` Uses external gate drivers (LM2724) for maximum layout flexibility and noise immunity
` Fixed frequency PWM architecture
` Pin selectable internal or external voltage reference
`0.5% core voltage set-point accuracy when using external voltage reference
` 0.9% accurate internal bandgap reference
` 2-, 3- or 4-phase operation
` Out-of-phase switching reduces input ripple current, thereby minimizing input capacitor requirements
` VID-code programmable output voltage range of 0.8375V through 1.6000V
` User programmable, low loss, load line slope
` User programmable Standard VID offset
` User programmable VCORE slew rate
` 5V power rail Under Voltage Lock Out (UVLO)
` Over Voltage Protection (OVP), Under Voltage Protection (UVP), and Over Current Protection (OCP) to defend against potentially catastrophic events
` User programmable fault latch that can be used to disable the regulator in the event a power system fault
` Very fast transient response
` VID-transition masked PWRGOOD output
` True-differential current sensing for each phase ensures accurate load current sharing
` User programmable cycle-by-cycle current limit


Application

·Server and desktop computer CPU core power supplies requiring a 2, 3- or 4-phase voltage regulator delivering up to 100A
· Transportable notebook computers using desktop CPUs
· Low cost transportable notebook computers using 2- or 3-phase designs


Pinout

Connection Diagram


Specifications

VCC5V                                                    -0.3V to 7V
PHASES, IREF, VSTDOS,
VPROG,
SLADJ1, SLADJ2, VREF,
REFINT,
CLIMADJ, VCORE, COMP,
VFB,
VILx, VIHx, SOFTCAP,
PWRGD,
VIDPGD, VID0-VID5,
VRON                                                      -0.3V to VCC5V + 0.3V
Differential Voltage (VILx
VIHx)                                                                                     1V
Ambient Storage Temp.
Range                                                     -65 to +150
Junction Temperature                             -20 to +150
Minimum ESD Rating
(Note 4)
Human Body Model
Machine Model
                                                                ±2kV
                                                                100pF
                                                                1.5 k
Soldering Dwell Time,
Temperature (Note 3)
Wave
Infrared
Vapor Phase
                                                               4sec, 260
                                                              10sec, 240
                                                              75sec, 219


Description

The LM27262MTDX is a versatile synchronous buck voltage regulator controller designed according to the Intel VRD10 Specification.

LM27262MTDX's a fixed-frequency voltage-mode control PWM with average current modulation of the reference voltage to achieve the desired output impedance. This approach imparts a pseudo current mode behavior to the control loop.

The part provides the control for a voltage regulator consisting of either 2-, 3- or 4-phases to provide power to a desktop CPU. Pulse-by-pulse phase current balancing ensures accurate current sharing. CPU core currents of over 90A can be supported without requiring significant over design of the power path. The LM27262 contains a precision 6-bit digitalto- analog converter (DAC) that uses a VID-code provided by the CPU to program the desired CPU core voltage. The regulator output voltage can be dynamically adjusted by changing the VID-code "on the fly".

The part is intended to provide all the specified functions laid out in the VRD-10 specification, making it as simple as possible for the user to realize a fully compliant CPU core supply for Intel's Pentium™4 and Prescott™ processors.

The LM27262MTDX is available in a 48-lead TSSOP package and in a 48-lead LLP package.




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