Rainbow-electronics MAX17409 Bedienungsanleitung PDF herunterladen

General Description

The MAX17409 is a 1-phase Quick-PWM™ step-down

VID power-supply controller for high-performance graph-

ics processors. The Quick-PWM control provides instan-

taneous response to fast-load current steps. Active

voltage positioning reduces power dissipation and bulk

output capacitance requirements and allows ideal posi-

tioning compensation for tantalum, polymer, or ceramic

bulk output capacitors.

The MAX17409 is intended for two different notebook

processor core applications: either bucking down the bat-

tery directly to create the core voltage, or bucking down

the +5V system supply. The single-stage conversion

method allows this device to directly step down high-volt-

age batteries for the highest possible efficiency.

Alternatively, 2-stage conversion (stepping down the +5V

system supply instead of the battery) at higher switching

frequency provides the minimum possible physical size.

A slew-rate controller allows controlled transitions

between VID codes. A thermistor-based temperature

sensor provides programmable thermal protection.

The MAX17409 is available in a 28-pin, 4mm x 4mm

TQFN package.

Applications

Graphics Core (GPU) Power Supplies

Voltage-Positioned Step-Down Converters

2-to-4 Li+ Cells Battery to Processor Core

Supply Converters

Notebooks/Desktops/Servers

Features

o 1-Phase Quick-PWM Controller

o ±6mV V

OUT

Accuracy Over Line, Load, and

Temperature

o 6-Bit Graphics DAC (12.5mV LSB)

o Active Voltage Positioning with Adjustable Gain

o Accurate Droop and Current Limit

o Remote Output and Ground Sense

o Buffered 2V Reference Output for Offsets

o Power-Good Window Comparator

o Temperature Comparator

o Drives Large Synchronous Rectifier FETs

o 2V to 26V Power Input Range

o Adjustable Switching Frequency (600kHz max)

o Output Overvoltage and Undervoltage Protection

o Soft-Startup and Soft-Shutdown

o Internal Boost Diodes

MAX17409

1-Phase Quick-PWM GPU Controller

________________________________________________________________

Maxim Integrated Products

GNDS/OFSP

CSN

CSP

SKIP

THRM

IMON

BST

PGND

REF

4567

2021 19 17 16 15

ILIM

SHDN

PWRGD

MAX17409

PAD

GND

CCV

TON

VRHOT

GND

THIN QFN

TOP VIEW

Pin Configuration

Ordering Information

19-4590; Rev 1; 7/09

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.

EVALUATION KIT

AVAILABLE

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

EP = Exposed pad.

PART TEMP RANGE PIN-PACKAGE

MAX17409GTI+ -40°C to +105°C 28 TQFN-EP*

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

1 2 3 4 5 6 ... 31 32

MAX17409 1

Inhaltsverzeichnis

Seite 1 - MAX17409

General DescriptionThe MAX17409 is a 1-phase Quick-PWM™ step-downVID power-supply controller for high-performance graph-ics processors. The Quick-PWM

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MAX174091-Phase Quick-PWM GPU Controller10 ______________________________________________________________________________________Pin DescriptionPIN NA

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 11Pin Description (cont

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MAX174091-Phase Quick-PWM GPU Controller12 ______________________________________________________________________________________Pin Description (cont

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 13OUTPUTSENSEGROUNDSENS

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MAX174091-Phase Quick-PWM GPU Controller14 ______________________________________________________________________________________SRQRSQTRIGQONE-SHOTPG

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 15DESIGN PARAMETERS 14A

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MAX174091-Phase Quick-PWM GPU Controller16 ______________________________________________________________________________________Detailed DescriptionF

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 17on-time by a period e

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MAX174091-Phase Quick-PWM GPU Controller18 ______________________________________________________________________________________SENSE RESISTORLMAX174

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 19(Figure 2), allowing

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MAX174091-Phase Quick-PWM GPU Controller2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATI

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MAX174091-Phase Quick-PWM GPU Controller20 ______________________________________________________________________________________G5 G4 G3 G2 G1 G0 OUT

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 21Output-Voltage Transi

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MAX174091-Phase Quick-PWM GPU Controller22 ______________________________________________________________________________________Forced-PWM Operation

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 23Power-Up Sequence (PO

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MAX174091-Phase Quick-PWM GPU Controller24 ______________________________________________________________________________________ShutdownWhen SHDN goe

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 25MOSFET Gate DriversTh

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MAX174091-Phase Quick-PWM GPU Controller26 ______________________________________________________________________________________capacitor selection,

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 27where:where RSENSE is

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MAX174091-Phase Quick-PWM GPU Controller28 ______________________________________________________________________________________In applications that

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 29driver can supply suf

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MAX174091-Phase Quick-PWM GPU Controller_______________________________________________________________________________________ 3PARAMETER SYMBOL CON

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MAX174091-Phase Quick-PWM GPU Controller30 ______________________________________________________________________________________Applications Informat

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MAX174091-Phase Quick-PWM GPU Controller______________________________________________________________________________________ 31Package InformationFo

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MAX174091-Phase Quick-PWM GPU ControllerMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim

Seite 27

ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= 12V, VDD= VCC= 5V, SHDN = ILIM = VCC, SKIP = GNDS = PGND = GND, VFB= VCSP= VCSN= 1.05

Seite 28

ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= 12V, VDD= VCC= 5V, SHDN = ILIM = VCC, SKIP = GNDS = PGND = GND, VFB= VCSP= VCSN= 1.05

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MAX174091-Phase Quick-PWM GPU Controller6 _______________________________________________________________________________________ELECTRICAL CHARACTERI

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MAX174091-Phase Quick-PWM GPU Controller_______________________________________________________________________________________ 7ELECTRICAL CHARACTERI

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MAX174091-Phase Quick-PWM GPU Controller8 _______________________________________________________________________________________0.9V OUTPUT EFFICIENC

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MAX174091-Phase Quick-PWM GPU Controller_______________________________________________________________________________________9Gm(IMON) TRANSCONDUCTA

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Rainbow-electronics MAX17409 Bedienungsanleitung

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