Rainbow-electronics MAX17480 Manual do Utilizador descarregar pdf

General Description

The MAX17480 is a triple-output, step-down, fixed-

frequency controller for AMD’s serial VID interface (SVI)

CPU and northbridge (NB) core supplies. The MAX17480

consists of two high-current SMPSs for the CPU cores

and one 4A internal switch SMPS for the NB core. The

two CPU core SMPSs run 180° out-of-phase for true

interleaved operation, minimizing input capacitance.

The 4A internal switch SMPS runs at twice the switching

frequency of the core SMPS, reducing the size of the

external components.

The MAX17480 is fully AMD SVI compliant. Output volt-

ages are dynamically changed through a 2-wire SVI,

allowing the SMPSs to be individually programmed to

different voltages. A slew-rate controller allows con-

trolled transitions between VID codes and controlled

soft-start. SVI also allows each SMPS to be individually

set into a low-power pulse-skipping state.

Transient phase repeat improves the response of the

fixed-frequency architecture, reducing the total output

capacitance for the CPU core. A thermistor-based tem-

perature sensor provides a programmable thermal-fault

output (VRHOT).

The MAX17480 includes output overvoltage protection

(OVP), undervoltage protection (UVP), and thermal pro-

tection. When any of these protection features detect a

fault, the controller shuts down. True differential current

sensing improves current limit and load-line accuracy.

The MAX17480 has an adjustable switching frequency,

allowing 100kHz to 600kHz operation per core SMPS,

and twice that for the NB SMPS.

Applications

Mobile AMD SVI Core Supplies

Multiphase CPU Core Supplies

Voltage-Positioned, Step-Down Converters

Notebook/Desktop Computers

Features

o Dual-Output Fixed-Frequency Core Supply

Controller

Split or Combinable Outputs Detected at

Power-Up

Dynamic Phase Selection Optimizes

Active/Sleep Efficiency

Transient Phase Repeat Reduces Output

Capacitance

True Out-of-Phase Operation Reduces Input

Capacitance

Programmable AC and DC Droop

Accurate Current Balance and Current Limit

Integrated Drivers for Large Synchronous-

Rectifier MOSFETs

Programmable 100kHz to 600kHz Switching

Frequency

4V to 26V Battery Input Voltage Range

o 4A Internal Switch Northbridge SMPS

2.7V to 5.5V Input Voltage Range

2x Programmable Switching Frequency

75mΩ/40mΩ Power Switches

o ±0.5% V

OUT

Accuracy over Line, Load, and

Temperature

o AMD SVI-Compliant Serial Interface with

Switchable Address

o 7-Bit On-Board DAC: 0 to +1.550V Output Adjust

Range

o Integrated Boost Switches

o Adjustable Slew-Rate Control

o Power-Good (PWRGD) and Thermal-Fault

(VRHOT) Outputs

o System Power-OK (PGD_IN) Input

o Overvoltage, Undervoltage, and Thermal-Fault

Protection

o Voltage Soft-Startup and Passive Shutdown

o < 1µA Typical Shutdown Current

MAX17480

AMD 2-/3-Output Mobile Serial

VID Controller

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4443; Rev 0; 2/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX17480GTL+ -40°C to +105°C 40 TQFN-EP*

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

Pin Configuration appears at end of data sheet.

1 2 3 4 5 6 ... 47 48

Resumo do Conteúdo

Página 1 - VID Controller

General DescriptionThe MAX17480 is a triple-output, step-down, fixed-frequency controller for AMD’s serial VID interface (SVI)CPU and northbridge (NB)

Página 2

MAX17480AMD 2-/3-Output Mobile SerialVID Controller10 ______________________________________________________________________________________ELECTRICAL

Página 3

MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 11Typical Op

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller12 ______________________________________________________________________________________Typical Op

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 13Typical Op

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CORE SMPS 1-PHASE TRANSIENTPHASE REPEATMAX17480 toc202µs/div1.2V1.5A13.5A12V0VOUT150mV/divILX110A/divLX110V/divVIN = 12V ILOAD1 = 1.5A TO 13.5A TO 1.5

Página 7

Typical Operating Characteristics (continued)(Circuit of Figure 2, VIN = 12V, VDD= VCC= 5V, VDDIO= 2.5V, TA = +25°C, unless otherwise noted.)CORE SMPS

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller16 ______________________________________________________________________________________Pin Descri

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 17Pin Descri

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller18 ______________________________________________________________________________________Pin Descri

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 19Pin Descri

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller2 _______________________________________________________________________________________ABSOLUTE M

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller20 ______________________________________________________________________________________Pin Descri

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 21COMPONENTV

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller22 ______________________________________________________________________________________MAX17480NL

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 23MAX17480NL

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller24 ______________________________________________________________________________________DAC1UVLORE

Página 18

MAX17480Detailed DescriptionThe MAX17480 consists of a dual fixed-frequency PWMcontroller with external switches that generate the sup-ply voltage for

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller26 ______________________________________________________________________________________Transient

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 27where VCS=

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller28 ______________________________________________________________________________________Nominal Ou

Página 22

MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 29of a downw

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller_______________________________________________________________________________________ 3PARAMETER

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller30 ______________________________________________________________________________________depending

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 31When using

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller32 ______________________________________________________________________________________where LESL

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 33Combined-M

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller34 ______________________________________________________________________________________For automa

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 35ShutdownWh

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller36 ______________________________________________________________________________________Fault Prot

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 37Adaptive d

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller38 ______________________________________________________________________________________Offset and

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 39Core SMPS

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller4 _______________________________________________________________________________________ELECTRICAL

Página 35

MAX17480AMD 2-/3-Output Mobile SerialVID Controller40 ______________________________________________________________________________________When using

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 41Core Power

Página 37

MAX17480AMD 2-/3-Output Mobile SerialVID Controller42 ______________________________________________________________________________________select the

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 43The capaci

Página 39

MAX17480AMD 2-/3-Output Mobile SerialVID Controller44 ______________________________________________________________________________________Bus Not Bu

Página 40

MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 45Command By

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller46 ______________________________________________________________________________________Maximum In

Página 42

MAX17480AMD 2-/3-Output Mobile SerialVID Controller______________________________________________________________________________________ 475) Make th

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MAX17480AMD 2-/3-Output Mobile SerialVID ControllerMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller_______________________________________________________________________________________ 5ELECTRICAL

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MAX17480AMD 2-/3-Output Mobile SerialVID Controller6 _______________________________________________________________________________________ELECTRICAL

Página 46 - Layout Procedure

MAX17480AMD 2-/3-Output Mobile SerialVID Controller_______________________________________________________________________________________ 7ELECTRICAL

Página 47 - Figure 15. PCB Layout Example

MAX17480AMD 2-/3-Output Mobile SerialVID Controller8 _______________________________________________________________________________________ELECTRICAL

Página 48

MAX17480AMD 2-/3-Output Mobile SerialVID Controller_______________________________________________________________________________________ 9ELECTRICAL

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Rainbow-electronics MAX17480 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX17480. Rainbow Electronics MAX17480 User Manual Manual do Utilizador

Resumo do Conteúdo

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