MAX17009GTL+【PDF 1/45 页】IC CTLR VIDEO SERIAL DUAL 40TQFN

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19-0814; Rev 0; 5/07

ATION

EVALU

AVAILA

KIT

BLE

AMD Mobile Serial VID Dual-Phase

Fixed-Frequency Controller

General Description

The MAX17009 is a 2-phase, step-down interleaved,

fixed-frequency controller for AMD’s ? serial VID inter-

face (SVI) CPU core supplies. Power-on detection of

the CPU configures the MAX17009 as two independent

single-phase regulators for a dual CPU core applica-

tion, or one high-current, dual-phase, combined-output

regulator for a unified core application. A reference

buffer output (NBV_BUF) sets the voltage-regulation

level for a North Bridge (NB) regulator, completing the

total CPU cores and NB power requirements.

The MAX17009 is fully AMD SVI compliant. Output volt-

ages are dynamically changed through a 2-wire serial

interface, allowing the switching regulator and the refe-

rence buffer to be individually programmed to different

voltages. A programmable slew-rate controller enables

controlled transitions between VID codes, soft-start limits

the inrush current, and soft-shutdown brings the output

voltage back down to zero without any negative ring.

Transient phase repeat improves the response of the

fixed-frequency architecture. Independently program-

mable AC and DC droop and selectable offset improve

stability and reduce the total output-capacitance

requirement. A thermistor-based temperature sensor

allows for a programmable thermal-fault output

( VRHOT ). The MAX17009 includes thermal-fault protec-

tion, undervoltage protection (UVP), and selectable out-

put overvoltage protection (OVP). When any of these

protection features detect a fault, the controller shuts

down. True differential current sensing improves cur-

rent limit, load-line accuracy, and current balance when

operating in combined mode. The MAX17009 has an

adjustable switching frequency, allowing 100kHz to

1.2MHz per-phase operation.

Applications

Mobile AMD SVI Core Supply

Multiphase CPU Core Supply

Voltage-Positioned, Step-Down Converters

Notebook/Desktop Computers

Features

o Dual-Output, Fixed-Frequency, Core Supply

Controller

o Separate or Combinable Outputs Detected at

Power-Up

o Reference Buffer Output for NB Controller

o ±0.4% V OUT Accuracy Over Line, Load, and

Temperature

o AMD SVI-Compliant Serial Interface

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

Range

o Dynamic Phase Selection Optimizes Active/Sleep

Efficiency

o Transient Phase Repeat Reduces Output

Capacitance

o True Out-of-Phase Operation Reduces Input

Capacitance

o Integrated Boost Switches

o Programmable AC and DC Droop

o Programmable 100kHz to 1.2MHz Switching

Frequency

o Accurate Current Balance and Current Limit

o Adjustable Slew-Rate Control

o Power-Good (PWRGD) and Thermal-Fault

( VRHOT ) Outputs

o System Power-OK (PGD_IN) Input

o Drives Large Synchronous-Rectifier MOSFETs

o 4V to 26V Battery Input-Voltage Range

o Overvoltage, Undervoltage, and Thermal-Fault

Protection

o Power Sequencing and Timing

o Soft-Startup and Soft-Shutdown

o < 1μA Typical Shutdown Current

Ordering Information

PART

MAX17009GTL+

TEMP RANGE

-40°C to +105°C

PIN-

PACKAGE

40 TQFN-EP*,

5mm x 5mm

PKG

CODE

T4055-1

Pin Configuration appears at end of data sheet.

+Denotes a lead-free package.

*EP = Exposed pad.

AMD is a registered trademark of Advanced Micro Devices, Inc.

________________________________________________________________ Maxim Integrated Products

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.

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